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Delft University of Technology
1.
De Bruin, C.G.M.
Linear avo inversion by prestack depth migration: Imaging angle dependent reflectivity as a tool for litho-stratigraphic inversion.
Degree: 1992, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe 
;
urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe
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urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe
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http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe
Subjects/Keywords: seismology; lithology
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APA (6th Edition):
De Bruin, C. G. M. (1992). Linear avo inversion by prestack depth migration: Imaging angle dependent reflectivity as a tool for litho-stratigraphic inversion. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe
Chicago Manual of Style (16th Edition):
De Bruin, C G M. “Linear avo inversion by prestack depth migration: Imaging angle dependent reflectivity as a tool for litho-stratigraphic inversion.” 1992. Doctoral Dissertation, Delft University of Technology. Accessed April 11, 2021.
http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe.
MLA Handbook (7th Edition):
De Bruin, C G M. “Linear avo inversion by prestack depth migration: Imaging angle dependent reflectivity as a tool for litho-stratigraphic inversion.” 1992. Web. 11 Apr 2021.
Vancouver:
De Bruin CGM. Linear avo inversion by prestack depth migration: Imaging angle dependent reflectivity as a tool for litho-stratigraphic inversion. [Internet] [Doctoral dissertation]. Delft University of Technology; 1992. [cited 2021 Apr 11].
Available from: http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe.
Council of Science Editors:
De Bruin CGM. Linear avo inversion by prestack depth migration: Imaging angle dependent reflectivity as a tool for litho-stratigraphic inversion. [Doctoral Dissertation]. Delft University of Technology; 1992. Available from: http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; urn:NBN:nl:ui:24-uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe ; http://resolver.tudelft.nl/uuid:1b7ad6be-b31e-4b08-88cd-201049bbf8fe
Delft University of Technology
2.
Omar, Mamdouh (author).
Fuzzy clustering for the compilation of pseudo-lithology maps and the exploration of zones of mineralization in Karasjok, northern Norway.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:f5d0f191-ff10-449b-87c2-98ff210d60f0
► Northern Norway has an extensive geological variation compared to other parts of Norway. It is home to major ore deposits containing base and precious metals.…
(more)
▼ Northern Norway has an extensive geological variation compared to other parts of Norway. It is home to major ore deposits containing base and precious metals. It is located within Fennoscandia, which has been identified as a significant metal-producing region in Europe. Recently, Northern Norway has extensively been surveyed using several geophysical techniques, which led to coverage improvement of basic geological information relevant to the assessment of its mineral potential. The study area, in the vicinity of Karasjok, is located on the Karasjok Greenstone Belt and comprises mainly Palaeoproterozoic rocks. This terrane is located on the same Palaeoproterozoic greenstone terrane of northern Finland, in which the detected gold deposits showed, with a few exceptions, similar characteristics to gold occurrences in Palaeoproterozoic greenstone belts in other parts of the world. Also, economic mineral deposits, e.g. Ni-Cu-PGE-Au mineralization, are largely restricted to events that occurred during the Palaeoproterozoic era. However, the study area for this study still remains largely under-explored and previous research and field work of the Karasjok Greenstone Belt have proven unsuccessful to locate significant mineral deposits. This area contains very few outcrops and traditional methods to map such areas are challenging. A large number of different geophysical data sets exist for Norway. While individual data sets cannot provide direct information about the
lithology of the mapped area, a combination of multiple data sets makes it possible to delineate and interpret characteristic regions of potentially similar
lithology. This is of particular interest where the geological map may be unreliable or that geological mapping itself is difficult, for example, due to difficult accessibility or large vegetation coverage. In this study, three fuzzy clustering algorithms, i.e. the fuzzy c-means algorithm, the Gustafson-Kessel algorithm, and the possibilistic fuzzy c-means algorithm, have been applied to compile pseudo-
lithology maps and to characterize zones of mineralization by integrating recently acquired high-resolution airborne geophysical data sets of Karasjok. These algorithms have been applied for the integration of long-wavelength data sets, i.e. gravity and magnetic data reflecting deep geological features, the integration of short-wavelength data sets, i.e. gravity and magnetic data reflecting shallow geological features, and the integration of three near-surface data sets, i.e. the two short-wavelength data sets and a potassium data set. Analyzing the interrelationship of the data sets and pre-processing the data sets, have shown to be necessary steps in order to determine what kind of geological differentiation of the study area will be obtained when applying the clustering algorithms. The application of the fuzzy clustering algorithms for the compilation of pseudo-
lithology maps have shown promising results. While the long-wavelength data sets indicated different, likely deeper, geological…
Advisors/Committee Members: van der Wal, Wouter (mentor), Gradmann, Sofie (mentor), Brönner, Marco (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Clustering; Geophysics; pseudo-lithology; mineralization
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APA (6th Edition):
Omar, M. (. (2019). Fuzzy clustering for the compilation of pseudo-lithology maps and the exploration of zones of mineralization in Karasjok, northern Norway. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f5d0f191-ff10-449b-87c2-98ff210d60f0
Chicago Manual of Style (16th Edition):
Omar, Mamdouh (author). “Fuzzy clustering for the compilation of pseudo-lithology maps and the exploration of zones of mineralization in Karasjok, northern Norway.” 2019. Masters Thesis, Delft University of Technology. Accessed April 11, 2021.
http://resolver.tudelft.nl/uuid:f5d0f191-ff10-449b-87c2-98ff210d60f0.
MLA Handbook (7th Edition):
Omar, Mamdouh (author). “Fuzzy clustering for the compilation of pseudo-lithology maps and the exploration of zones of mineralization in Karasjok, northern Norway.” 2019. Web. 11 Apr 2021.
Vancouver:
Omar M(. Fuzzy clustering for the compilation of pseudo-lithology maps and the exploration of zones of mineralization in Karasjok, northern Norway. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 11].
Available from: http://resolver.tudelft.nl/uuid:f5d0f191-ff10-449b-87c2-98ff210d60f0.
Council of Science Editors:
Omar M(. Fuzzy clustering for the compilation of pseudo-lithology maps and the exploration of zones of mineralization in Karasjok, northern Norway. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:f5d0f191-ff10-449b-87c2-98ff210d60f0
3.
Longjam Kabita Chanu.
Geochemistry and petrogenesis of Precambrian khairagarh
mafic magmatic suite of rocks: constraints on precambrian crustal
evolution in central India; -.
Degree: Geology, 2012, University of Delhi
URL: http://shodhganga.inflibnet.ac.in/handle/10603/9164
► The Khairagarh Group (study area) is one of the Proterozoic volcano sedimentary sequences exposed in the north western part of the Bastar Craton, having close…
(more)
▼ The Khairagarh Group (study area) is one of the
Proterozoic volcano sedimentary sequences exposed in the north
western part of the Bastar Craton, having close chemical affinity
with islandand#8208;arc magmas and Andeanand#8208;type rift
tectonic setting.In this area the basement comprises of the
Archaean Amgaon gneisses which is uncomformably overlain by the
Dongargarh supergroup rocks, which further branches out into the
volcanic group (Nandgaon group) and the volcano-sedimentary group
(Khairagarh group). From the detailed petrographic studies and on
the basis of mineralogical compositions, the Khairagarh volcanic
has been divided into: Low-Ti volcanic Intermediate-Ti volcanics
High-Ti volcanic and High Magnesium Andesite (HMA). The basic
volcanic sample ranges from basalt to basaltic-andesite. The other
volcanic HMA sample ranges from basaltic-andesite to andesitic
field. Enriched nature of LREEs and other incompatible elements
from the overall data probably indicates continental tholeiites or
P-type MORB characteristics. Variable depletion of HREE probably
indicates a shallow garnet free to garnet bearing sources for the
observed large compositional variation. Depletion of Eu is an
indicative of plagioclase fractionation. The depleted mantle model
ages for the Khairagarh volcanic vary from 2489 to 2984 Ma. The aim
of the study is to characterize the volcanic sand to put
constraints on their genesis, source characteristics and tectonic
environment. Based on the Nd model ages of these rocks, we also
explore the possibility of understanding the connection between the
Khairagarh volcanoand#8208;sedimentary sequences and the
Precambrian Supercontinents Ur and Columbia, as the evolution of
the Khairagarh rocks are contemporaneous with these
supercontinents.
References p.73-85, Appendices
p.86-96
Advisors/Committee Members: Talat Ahmad.
Subjects/Keywords: Geology; Indian Peninsular Shield; Lithology; Geochemistry
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APA (6th Edition):
Chanu, L. K. (2012). Geochemistry and petrogenesis of Precambrian khairagarh
mafic magmatic suite of rocks: constraints on precambrian crustal
evolution in central India; -. (Thesis). University of Delhi. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chanu, Longjam Kabita. “Geochemistry and petrogenesis of Precambrian khairagarh
mafic magmatic suite of rocks: constraints on precambrian crustal
evolution in central India; -.” 2012. Thesis, University of Delhi. Accessed April 11, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/9164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chanu, Longjam Kabita. “Geochemistry and petrogenesis of Precambrian khairagarh
mafic magmatic suite of rocks: constraints on precambrian crustal
evolution in central India; -.” 2012. Web. 11 Apr 2021.
Vancouver:
Chanu LK. Geochemistry and petrogenesis of Precambrian khairagarh
mafic magmatic suite of rocks: constraints on precambrian crustal
evolution in central India; -. [Internet] [Thesis]. University of Delhi; 2012. [cited 2021 Apr 11].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chanu LK. Geochemistry and petrogenesis of Precambrian khairagarh
mafic magmatic suite of rocks: constraints on precambrian crustal
evolution in central India; -. [Thesis]. University of Delhi; 2012. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Montana Tech
4.
Brickl, Melissa A.
Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana.
Degree: MS, 2012, Montana Tech
URL: https://scholarworks.umt.edu/etd/361
► In the South Fork watershed of the Flathead River the two main determinants of electrical conductivity appear to be lithology and structure (faults). Limestone…
(more)
▼ In the South Fork watershed of the Flathead River the two main determinants of electrical conductivity appear to be lithology and structure (faults). Limestone and dolomite produce high electrical conductivities (150 to 300 mS•cm-1), shale medium conductivities (70-150 mS•cm-1) and quartz, siltite, argillite low conductivities (0 to 70 mS•cm-1). Conductivity measurements from tributaries of the South Fork ranged from 40 to 290 mS•cm-1. South Fork River conductivity values ranged from 132 to 198 mS•cm-1. Longitudinally, the South Fork Rivers’ electrical conductivity values exhibited diurnal fluxes, but overall decreased with distance from the headwaters. In general, electrical conductivity was greater (> 150 mS•cm-1) east of the South Fork Fault, which runs parallel with the east bank of the South Fork River. The geology that covers the greatest percentage of a watershed may determine the drainages’ conductivity, however all geologies and their percent of cover should be considered when no one geology appears to dominate. This study generally assessed surface groundwater interactions in the South Fork watershed and in doing so, demonstrated how electrical conductivity, lithology and structure can be used to simplify our understanding of complex hydrologic systems. Electrical conductance data and spatial patterns identified in this study provide resource managers clues as to where aquatic biota might and do thrive.
Subjects/Keywords: faults; specific electrical conductivity; Flathead River; lithology
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APA (6th Edition):
Brickl, M. A. (2012). Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana. (Masters Thesis). Montana Tech. Retrieved from https://scholarworks.umt.edu/etd/361
Chicago Manual of Style (16th Edition):
Brickl, Melissa A. “Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana.” 2012. Masters Thesis, Montana Tech. Accessed April 11, 2021.
https://scholarworks.umt.edu/etd/361.
MLA Handbook (7th Edition):
Brickl, Melissa A. “Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana.” 2012. Web. 11 Apr 2021.
Vancouver:
Brickl MA. Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana. [Internet] [Masters thesis]. Montana Tech; 2012. [cited 2021 Apr 11].
Available from: https://scholarworks.umt.edu/etd/361.
Council of Science Editors:
Brickl MA. Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana. [Masters Thesis]. Montana Tech; 2012. Available from: https://scholarworks.umt.edu/etd/361
San Jose State University
5.
Johnson, Brittany Danielle.
Lithologic controls on knickpoint formation in Sierra Nevada bedrock channels.
Degree: MS, Geology, 2015, San Jose State University
URL: https://doi.org/10.31979/etd.36yj-4qzk
;
https://scholarworks.sjsu.edu/etd_theses/4641
► In the Sierra Nevada Mountains, the distribution of knickpoints in bedrock channels is often used as evidence to argue that the mountain range has…
(more)
▼ In the Sierra Nevada Mountains, the distribution of knickpoints in bedrock channels is often used as evidence to argue that the mountain range has been recently uplifted. The assumption that bedrock channel knickpoints are transient features responding to a recent pulse of uplift contributes to the ongoing debate about the range’s geomorphic and tectonic evolution. Determining how knickpoints form in heterogeneous granitic landscapes remains fundamental in understanding the lithologic, tectonic, and climatic controls on bedrock incision. Defining the controls on knickpoint formation may limit how knickpoints are used to infer the tectonic history of the Sierra Nevada. In this study, tributaries of the North Fork Feather and Merced Rivers are examined because they are underlain by a variety of rock types, thereby providing an opportunity to investigate the relationship between lithologic diversity and knickpoint formation. In these tributaries, bedrock above knickpoints is often finer grained with a higher percentage of quartz than bedrock below the knickpoint. The differences in bedrock grain size and quartz content are found to be statistically significant. This study argues that variations in rock hardness predispose lithologically heterogeneous bedrock channels to express transitions in a channel’s resistance to erosion as knickpoints. Thus, knickpoints in Sierra Nevada bedrock channels may have formed by differential erosion rather than uplift-driven incision, and using Sierra Nevada bedrock channel knickpoints as a tool to interpret tectonic activity is arguably inappropriate.
Subjects/Keywords: Bedrock channel; Geomorphology; Granitic geomorphology; Knickpoint; Lithology; Sierra Nevada
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APA (6th Edition):
Johnson, B. D. (2015). Lithologic controls on knickpoint formation in Sierra Nevada bedrock channels. (Masters Thesis). San Jose State University. Retrieved from https://doi.org/10.31979/etd.36yj-4qzk ; https://scholarworks.sjsu.edu/etd_theses/4641
Chicago Manual of Style (16th Edition):
Johnson, Brittany Danielle. “Lithologic controls on knickpoint formation in Sierra Nevada bedrock channels.” 2015. Masters Thesis, San Jose State University. Accessed April 11, 2021.
https://doi.org/10.31979/etd.36yj-4qzk ; https://scholarworks.sjsu.edu/etd_theses/4641.
MLA Handbook (7th Edition):
Johnson, Brittany Danielle. “Lithologic controls on knickpoint formation in Sierra Nevada bedrock channels.” 2015. Web. 11 Apr 2021.
Vancouver:
Johnson BD. Lithologic controls on knickpoint formation in Sierra Nevada bedrock channels. [Internet] [Masters thesis]. San Jose State University; 2015. [cited 2021 Apr 11].
Available from: https://doi.org/10.31979/etd.36yj-4qzk ; https://scholarworks.sjsu.edu/etd_theses/4641.
Council of Science Editors:
Johnson BD. Lithologic controls on knickpoint formation in Sierra Nevada bedrock channels. [Masters Thesis]. San Jose State University; 2015. Available from: https://doi.org/10.31979/etd.36yj-4qzk ; https://scholarworks.sjsu.edu/etd_theses/4641
Vanderbilt University
6.
Copeland, Marja Antoinell.
Stream-Channel Morphology in a Mixed-Bedrock Valley: The Harpeth River Watershed, Middle Tennessee.
Degree: MS, Earth and Environmental Sciences, 2014, Vanderbilt University
URL: http://hdl.handle.net/1803/13964
► Factors such as lithology, tectonics and climate have been identified as exerting control on the form of stream channels and on the evolution of watersheds.…
(more)
▼ Factors such as
lithology, tectonics and climate have been identified as exerting control on the form of stream channels and on the evolution of watersheds. The degree to which these factors interact to influence landscape erosion and its evolution has been an area of extensive research. Here, we use Digital Elevation Models to extract metrics of basin morphology to determine the form and the controls on river long profiles in the Harpeth River Watershed, which drains the Paleozoic carbonate bedrock of the Nashville Basin and the Western Highland Rim. We use the integral approach, which transforms the horizontal coordinate by integrating drainage area over flow distance to produce the transformed horizontal coordinate, χ, along with river long profiles to determine the relative influence of
lithology on the form of the river profiles. The results show that drainage area, a proxy for water discharge, exerts the greatest influence on channel geometry in the Harpeth River Watershed as is indicated by m/n values that center around 0.5. Deviations from the linear, χ-transformed elevation profiles that are produced at m/n = 0.50±0.05 were found to be as a result of local differences in bedrock
lithology that affect erodibility and sediment production.
Advisors/Committee Members: David Furbish (committee member), Molly Miller (committee member), Steven L. Goodbred, Jr. (Committee Chair).
Subjects/Keywords: fluvial geomorphology; bedrock lithology; middle Tennessee; landscape evolution
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APA ·
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APA (6th Edition):
Copeland, M. A. (2014). Stream-Channel Morphology in a Mixed-Bedrock Valley: The Harpeth River Watershed, Middle Tennessee. (Thesis). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13964
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Copeland, Marja Antoinell. “Stream-Channel Morphology in a Mixed-Bedrock Valley: The Harpeth River Watershed, Middle Tennessee.” 2014. Thesis, Vanderbilt University. Accessed April 11, 2021.
http://hdl.handle.net/1803/13964.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Copeland, Marja Antoinell. “Stream-Channel Morphology in a Mixed-Bedrock Valley: The Harpeth River Watershed, Middle Tennessee.” 2014. Web. 11 Apr 2021.
Vancouver:
Copeland MA. Stream-Channel Morphology in a Mixed-Bedrock Valley: The Harpeth River Watershed, Middle Tennessee. [Internet] [Thesis]. Vanderbilt University; 2014. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1803/13964.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Copeland MA. Stream-Channel Morphology in a Mixed-Bedrock Valley: The Harpeth River Watershed, Middle Tennessee. [Thesis]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/13964
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Stellenbosch University
7.
Indongo, Jason Linekela.
The Lithological and Structural Characterisation of the Sperlingputs Shear Zone in Southern Namibia.
Degree: MSc, Earth Sciences, 2017, Stellenbosch University
URL: http://hdl.handle.net/10019.1/102936
► ENGLISH ABSTRACT: The Richtersveld Magmatic Arc (RMA) forms a major ~200km wide Palaeoproterozoic block within the Mesoproterozoic Namaqua Metamorphic Province (NMP). The RMA consist of…
(more)
▼ ENGLISH ABSTRACT: The Richtersveld Magmatic Arc (RMA) forms a major ~200km wide Palaeoproterozoic block within the Mesoproterozoic Namaqua Metamorphic Province (NMP). The RMA consist of rafts of Orange River Group volcanic rocks intruded by voluminous coeval Vioolsdrif Suite granitoids (1905-1865 Ma, [1]). The RMA is further subdivided into two domains with equivalent stratigraphic units but different metamorphic grade and deformation. In the west are low grade greenschist-facies rocks affected only by D1 which have been termed the Vioolsdrif Domain. These rocks are separated by a km wide tectonic zone termed the Southern Namaqua Front from the amphibolite-facies Pella Domain in the NE. The Pella Domain is strongly transposed by the main ductile D2 phase of the Namaqua Orogeny at ~1215Ma. As part of a regional scale mapping program by the Namibian Geological Survey and the Council for Geoscience, the Southern Namaqua Front has been re-examined and redefined. The Southern Namaqua Front in fact coincides with the northern margin of a ~15 km deformation zone termed the Sperlingputs Shear Zone System (SPSZS). The SPSZS consists of three main WNW-trending, steeply dipping shear zones that cross-cut the Vioolsdrif Domain and truncate the Haib porphyry Cu deposit. Collectively the SPSZS represents an anastomosing zone of deformation that mainly follows the less competent Orange River Group volcanic rocks that are sheared into fissile cataclasites and mylonites and wrap around largely unsheared blocks of bedded lava and, more often, granitoids of the Vioolsdrif Suite. The northernmost shear zone termed Fontal-SPSZS reworks the Southern Namaqua Front and cross-cuts the penetrative Pella Domain fabrics and structures, and thus post-dates D2. The rocks on the north of the F-SPSZS have a gneissic and schistose texture, with an overall mid to upper amphibolite-facies mineral assemblage, whilst those on the south of the F-SPSZS, are weakly deformed with a lower greenschist-facies mineral assemblage. The dominant steeply south plunging lineation along with various shear sense indicators suggest a significant a dextral sense of movement, which is the transpression regime. However, in some areas, the shear zones are accompanied by the development of vertical lineation with a suggesting a vertical component to the shear with an overall top to the south sense of movement. The SPSZS is intruded by pegmatite dykes and large plugs, both deformed and undeformed, which suggests intrusion during and soon after shearing - a relationship similar to that in other large shear zones in the area (Marshall Rocks-Pofadder Shear Zone (MRPSZ), Eureka shear Zone(ESZ)). Assuming that these pegmatites are equivalent to those in other parts of the Pella Domain (MRPSZ and ESZ), the SPSZS developed during the late Namaqua D4-dextral shearing event between ca. 1005 and 950 Ma, together with the also NW-trending Marshall Rocks-Pofadder and Eureka Shear Zones.
AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar
Advisors/Committee Members: Miller, Jodie A., Macey, Paul, Stellenbosch University. Faculty of Science. Dept. of Earth Sciences..
Subjects/Keywords: Lithology – Southern Namibia; Shear zone(Geology) – Namibia; UCTD
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APA ·
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Manager
APA (6th Edition):
Indongo, J. L. (2017). The Lithological and Structural Characterisation of the Sperlingputs Shear Zone in Southern Namibia. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/102936
Chicago Manual of Style (16th Edition):
Indongo, Jason Linekela. “The Lithological and Structural Characterisation of the Sperlingputs Shear Zone in Southern Namibia.” 2017. Masters Thesis, Stellenbosch University. Accessed April 11, 2021.
http://hdl.handle.net/10019.1/102936.
MLA Handbook (7th Edition):
Indongo, Jason Linekela. “The Lithological and Structural Characterisation of the Sperlingputs Shear Zone in Southern Namibia.” 2017. Web. 11 Apr 2021.
Vancouver:
Indongo JL. The Lithological and Structural Characterisation of the Sperlingputs Shear Zone in Southern Namibia. [Internet] [Masters thesis]. Stellenbosch University; 2017. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/10019.1/102936.
Council of Science Editors:
Indongo JL. The Lithological and Structural Characterisation of the Sperlingputs Shear Zone in Southern Namibia. [Masters Thesis]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/102936
Texas A&M University
8.
Yang, Mei.
Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology.
Degree: MS, Petroleum Engineering, 2011, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9808
► Hydraulic Fracturing is a technique to accelerate production and enhance ultimate recovery of oil and gas while fracture geometry is an important aspect in hydraulic…
(more)
▼ Hydraulic Fracturing is a technique to accelerate production and enhance ultimate recovery of oil and gas while fracture geometry is an important aspect in hydraulic fracturing design and optimization. Systematic design procedures are available based on the so-called two-dimensional models (2D) focus on the optimization of fracture length and width, assuming one can estimate a value for fracture height, while so-called pseudo three dimensional (p-3D) models suitable for multi-layered reservoirs aim to maximize well production by optimizing fracture geometry, including fracture height, half-length and width at the end of the stimulation treatment.
The proposed p-3D approach to design integrates four parts: 1) containment layers discretization to allow for a range of plausible fracture heights, 2) the Unified Fracture Design (UFD) model to calculate the fracture half-length and width, 3) the PKN or KGD models to predict hydraulic fracture geometry and the associated net pressure and other treatment parameters, and, finally, 4) Linear Elastic Fracture Mechanics (LEFM) to calculate fracture height. The aim is to find convergence of fracture height and net pressure.
Net pressure distribution plays an important role when the fracture is propagating in the reservoir. In multi-layered reservoirs, the net pressure of each layer varies as a result of different rock properties. This study considers the contributions of all layers to the stress intensity factor at the fracture tips to find the final equilibrium height defined by the condition where the fracture toughness equals the calculated stress intensity factor based on LEFM.
Other than maximizing production, another obvious application of this research is to prevent the fracture from propagating into unintended layers (i.e. gas cap and/or aquifer).
Therefore, this study can aid fracture design by pointing out: (1) Treating pressure needed to optimize fracture geometry, (2) The containment top and bottom layers of a multi-layered reservoir, (3) The upwards and downwards growth of the fracture tip from the crack center.
Advisors/Committee Members: Valko, Peter p. (advisor), Ehlig-Economides, Christine E. (committee member), Lazarov, Raytcho (committee member).
Subjects/Keywords: Pseudo-3D; Multi-layered Lithology; Hydraulic Fracture Optimization model
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APA (6th Edition):
Yang, M. (2011). Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9808
Chicago Manual of Style (16th Edition):
Yang, Mei. “Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology.” 2011. Masters Thesis, Texas A&M University. Accessed April 11, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9808.
MLA Handbook (7th Edition):
Yang, Mei. “Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology.” 2011. Web. 11 Apr 2021.
Vancouver:
Yang M. Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9808.
Council of Science Editors:
Yang M. Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9808
Penn State University
9.
Ward, Jessie J.
A comparison of oak seedling survival and growth across three geologic formations in Pennsylvania.
Degree: 2016, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/13544jjw366
► Shifts in forest composition have led to challenges in the regeneration of commercially and ecologically important tree species. Therefore, in the eastern U.S.A., the identification…
(more)
▼ Shifts in forest composition have led to challenges in the regeneration of commercially and ecologically important tree species. Therefore, in the eastern U.S.A., the identification of factors leading to successful oak regeneration is an area of considerable interest. Site quality, which is largely determined by soils, is known to affect regeneration, but the specific reasons are unclear. Oaks are found in forest canopies across the site quality range; however, the greatest overall growth is found on high quality sites. We investigated if survival and growth of northern red oak seedlings is influenced by
lithology by comparing sites with different soil properties. To do so, experimental plantings, were established on soils that vary in both chemical and structural properties having derived from three different geologic formations: sandstone (Tuscarora), shale (Juniata), and shale/sandstone colluvium (Clinton) in Pennsylvania’s Ridge and Valley physiographic province. Over a four-year period, we monitored seedling survival, height, ground-line diameter, and number of leaves. When compared to seedlings growing on sandstone and sandstone/shale colluvium-derived soils seedlings on shale-derived soils had higher survival; however survival over the measurement period declined similarly (p=0.832). Repeated measures analysis indicated that seedlings on sandstone soils were taller than those on shale after four years (p=0.003), while diameter of stems at ground level was similar (p=0.235). Growth of seedlings on sandstone was consistently greater than growth on shale and shale/sandstone colluvium soils for height, diameter, and number of leaves. Higher root electrolyte leakage on these sites may have been due to low base cation to aluminum ratios on shale and shale/sandstone colluvium soils and resulted in stress of seedlings. The shale and shale/sandstone derived sites in this study were expected to have more ideal establishment conditions for oak seedlings, however, aluminum toxicity may actually be limiting seedling establishment on these sites.
Advisors/Committee Members: Aaron David Stottlemyer, Thesis Advisor/Co-Advisor, David Eissenstat, Committee Member, Margot Wilkinson Kaye, Committee Member.
Subjects/Keywords: geologic formation; oak regeneration; northern red oak; lithology; root electrolyte leakage
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APA (6th Edition):
Ward, J. J. (2016). A comparison of oak seedling survival and growth across three geologic formations in Pennsylvania. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13544jjw366
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ward, Jessie J. “A comparison of oak seedling survival and growth across three geologic formations in Pennsylvania.” 2016. Thesis, Penn State University. Accessed April 11, 2021.
https://submit-etda.libraries.psu.edu/catalog/13544jjw366.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ward, Jessie J. “A comparison of oak seedling survival and growth across three geologic formations in Pennsylvania.” 2016. Web. 11 Apr 2021.
Vancouver:
Ward JJ. A comparison of oak seedling survival and growth across three geologic formations in Pennsylvania. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Apr 11].
Available from: https://submit-etda.libraries.psu.edu/catalog/13544jjw366.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ward JJ. A comparison of oak seedling survival and growth across three geologic formations in Pennsylvania. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/13544jjw366
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
10.
Hill, Lillian Z.
Lithological Controls on Soil Properties of Temperate Forest Ecosystems in Central Pennsylvania.
Degree: 2017, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/13586lzh157
► Shale and sandstone are the most common lithologies of the forested ridges throughout the Appalachian Mountains. The overall goal of this thesis was to determine…
(more)
▼ Shale and sandstone are the most common lithologies of the forested ridges throughout the Appalachian Mountains. The overall goal of this thesis was to determine whether these two rock types impart distinct biogeochemical properties to soils and plants. The effects of rock type (
lithology) on soil gas concentration, nutrient concentration and nutrient limitation were studied in the Ridge and Valley province of central Pennsylvania. To increase understanding of lithological controls on soil gases (Chapter 1), we monitored the depth distribution of soil CO2 and O2 concentrations in central Pennsylvania in two watersheds on different lithologies. We deployed gas monitoring instrumentation on two catena transects that included four topographical positions, one located on sandstone and the other on shale. As expected, with increasing soil depth O2 concentrations decreased while pCO2 increased. CO2 and O2 concentrations varied more with topographical position than with
lithology, as the valley floor positions in both catenas had the highest pCO2 for a given depth. Both manual sampling from gas access tubes throughout the soil profile and continuous sampling by buried sensors documented these patterns. Adjacent forests underlain by shale and sandstone lithologies are prevalent throughout the Appalachian Mountains and may have differences in nutrient concentrations and limitation due to the lithologies and subsequent weathering. Nutrient limitation in temperate forest ecosystems often regulates plant productivity, and contemporary conceptual models emphasize nitrogen (N) as the main limiting nutrient. However, with increased global fossil fuel emissions and subsequent deposition of nitrogen, this assumption may not hold. In ecosystems that are receiving high N inputs, the availability of phosphorus (P) and cations, such as calcium (Ca) and magnesium (Mg), may become a key determinant of plant growth. In many conceptual models, plant-soil interactions are depicted; however,
lithology is often not incorporated. We use five sites located on shale
lithology and five of sandstone
lithology to investigate nutrient pools in the mineral soil and the foliage of two tree species (Chapter 2). Our results show that shale and sandstone weather to form different nutrient availability signatures, with higher availability of most rock-derived nutrients on shale. However, extractable P and inorganic N concentrations were higher in the sandstone-derived soils. Furthermore, trees grown on the sandstone sites had higher foliar P concentrations and lower P resorption at senescence. These results suggest that relative to shale, soils developing on sandstone ridges have more P available in soil and less P limitation to plants, despite lower P concentrations in the underlying rock. We hypothesize that higher P availability on sandstone ridges is not from in situ weathering of sandstone, but rather, a possible result of periglacial loess deposits. In conclusion, our studies showed that 1) lower landscape positions have more soil CO2 and could…
Advisors/Committee Members: Jason Philip Kaye, Thesis Advisor/Co-Advisor, Roman Alexander Dibiase, Committee Member, David Eissenstat, Committee Member, Patrick Joseph Drohan, Committee Member.
Subjects/Keywords: Lithology; Nutrient Cycles; Critical Zone; Soil Gas; Soil Properties; Temperate Forest
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APA (6th Edition):
Hill, L. Z. (2017). Lithological Controls on Soil Properties of Temperate Forest Ecosystems in Central Pennsylvania. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13586lzh157
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hill, Lillian Z. “Lithological Controls on Soil Properties of Temperate Forest Ecosystems in Central Pennsylvania.” 2017. Thesis, Penn State University. Accessed April 11, 2021.
https://submit-etda.libraries.psu.edu/catalog/13586lzh157.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hill, Lillian Z. “Lithological Controls on Soil Properties of Temperate Forest Ecosystems in Central Pennsylvania.” 2017. Web. 11 Apr 2021.
Vancouver:
Hill LZ. Lithological Controls on Soil Properties of Temperate Forest Ecosystems in Central Pennsylvania. [Internet] [Thesis]. Penn State University; 2017. [cited 2021 Apr 11].
Available from: https://submit-etda.libraries.psu.edu/catalog/13586lzh157.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hill LZ. Lithological Controls on Soil Properties of Temperate Forest Ecosystems in Central Pennsylvania. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/13586lzh157
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Du Toit, Mattheus Casparus.
Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal.
Degree: 2015, University of Johannesburg
URL: http://hdl.handle.net/10210/15044
► PhD. (Geology)
The lithology, stratigraphy, metamorphism and structure of the rocks in a highly deformed and metamorphosed terrain, some 5 000 km 2 in extent,…
(more)
▼ PhD. (Geology)
The lithology, stratigraphy, metamorphism and structure of the rocks in a highly deformed and metamorphosed terrain, some 5 000 km 2 in extent, south of the Soutpansberg in the Northern Transvaal, are described. The Bandelierkop Formation, which is comprised of Ultramafic-, Mafic- and Pelitic gneisses occur as deformed and metamorphosed remnants in tonalitic grey granitoids known as the Baviaanskloof Gneiss. The Ultramafic- and Mafic gneisses of the Bandelierkop Formation, in which granulite grade mineral assemblages exist, are chemically equivalent to peridotitic and basaltic komatiites and basaltic tholeiites of Archaean greenstone terrains. The greenstone origin for the gneisses is also indicated by the Hout River traverse in which material, at the lower to middle amphibolite facies, becomes progressively metamorphosed and deformed over a distance of 10 km to the granulite grade of metamorphism. The Pelitic gneiss of the Bandelierkop. Formation is chemically similar to greywackes and shales of the Fig Tree Group and Belvue Road Formations of the Swaziland sequence. The area of investigation is divided into two high-grade metamorphic zones separated by an eastnortheast trending Orthopyroxene isograd. The rocks of the Orthopyroxene zone to the north of the isograd were subjected to two events of regional metamorphism (M 1 and M2 ). The area south of the isograd, known as the Orthoamphibole zone, is characterised by the presence of silverygrey anthophyllite blades in Pelitic gneiss which formed during the M3 event. The southern limit of the Orthoamphibole zone, in the south-eastern portion of the area is poorly exposed and thus less well defined.
Subjects/Keywords: Geology; Stratigraphy; Lithology
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APA (6th Edition):
Du Toit, M. C. (2015). Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/15044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Du Toit, Mattheus Casparus. “Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal.” 2015. Thesis, University of Johannesburg. Accessed April 11, 2021.
http://hdl.handle.net/10210/15044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Du Toit, Mattheus Casparus. “Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal.” 2015. Web. 11 Apr 2021.
Vancouver:
Du Toit MC. Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal. [Internet] [Thesis]. University of Johannesburg; 2015. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/10210/15044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Du Toit MC. Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal. [Thesis]. University of Johannesburg; 2015. Available from: http://hdl.handle.net/10210/15044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Nairobi
12.
Mogaka, Daniel N.
Geophysical characterization of the lithology and structure of the Olobanita Well Field, Lower Lake Baringo Basin, Kenya Rift: Implication on Groundwater occurrence
.
Degree: 2010, University of Nairobi
URL: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9883
► The task of the research project is the use of geophysical technologies for the characterization of the lithology and structure beneath the Olobanita well field,…
(more)
▼ The task of the research project is the use of geophysical technologies for the characterization of
the lithology and structure beneath the Olobanita well field, and determine their implications on
the groundwater drilling operations in the basin. Development of the aquifer since the 2000’s to
date by the government agencies and its development partners through drilling, has resulted in
generation over time of data and information on its water resources. Consequently, borehole
collapse problems have been reported that have resulted from the drilling activities. This has
been used by my research as a guide to the study of the subsurface of the well field. Geophysical
techniques employed includes electrical resistivity (vertical electrical sounding (VES) and
electrical resistivity tomography (ERT)), magnetics and geospatial techniques like geographical
information systems (GIS) and global positioning system (GPS) for development of maps.
The Olobanita Basin with an area of 625km2, a volcano-sedimentary basin is located in the
Central Kenya Rift, Nakuru district of Rift Valley Province. It is located between latitudes 0000’N
and 0015’ S and longitudes 36000’ and 36015’ E. For the study, establishments on the subsurface
geology of the wellfield were made from; borehole geologic logs, vertical electrical sounding
interpreted data, electrical resistivity tomographic interpreted data and magnetic data analysis
results and reports by other researchers.
The vertical electrical sounding and the 2-Dimension (2D) Resistivity imaging allowed a
distinction to be made between very high resistive volcanic sands, the moderately high resistivity
freshwater saturated zone and the very low resistive clays in localised areas. The geological
interpretation of the surveys correlated very well with the borehole data. Vertical faults have
resulted in minor down-throwing of blocks in areas close to the rift wall on the east and some
few metres to the west margins of the VES grid area. It is concluded that the well-field lies in a
volcano-sedimentary basin, where the results from the analysis shows that there exists volcanic
sand and silt formation to a depth of about 40 metres underlain by volcanic ashes and fragments
to a depth of about 80 metres with intercalations of hard rock formations mainly; welded tuffs
and trachyte. These loose unconsolidated geologic materials are vulnerable to collapsing by any
chance of disturbance. To the depth beyond 80 metres to about 300 metres exists loose
sediments with rounded fragments; thus, contributes to the borehole blockage and collapsing
challanges.
Subjects/Keywords: lithology;
Olobanita Well Field;
Lower Lake Baringo Basin;
Groundwater
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APA (6th Edition):
Mogaka, D. N. (2010). Geophysical characterization of the lithology and structure of the Olobanita Well Field, Lower Lake Baringo Basin, Kenya Rift: Implication on Groundwater occurrence
. (Thesis). University of Nairobi. Retrieved from http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9883
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mogaka, Daniel N. “Geophysical characterization of the lithology and structure of the Olobanita Well Field, Lower Lake Baringo Basin, Kenya Rift: Implication on Groundwater occurrence
.” 2010. Thesis, University of Nairobi. Accessed April 11, 2021.
http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9883.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mogaka, Daniel N. “Geophysical characterization of the lithology and structure of the Olobanita Well Field, Lower Lake Baringo Basin, Kenya Rift: Implication on Groundwater occurrence
.” 2010. Web. 11 Apr 2021.
Vancouver:
Mogaka DN. Geophysical characterization of the lithology and structure of the Olobanita Well Field, Lower Lake Baringo Basin, Kenya Rift: Implication on Groundwater occurrence
. [Internet] [Thesis]. University of Nairobi; 2010. [cited 2021 Apr 11].
Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9883.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mogaka DN. Geophysical characterization of the lithology and structure of the Olobanita Well Field, Lower Lake Baringo Basin, Kenya Rift: Implication on Groundwater occurrence
. [Thesis]. University of Nairobi; 2010. Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9883
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Nairobi
13.
OGEU, ONYANGO EDWIN.
Geometry and lithology of the subsurface responsible for collapsing of boreholes in Olobanita well-field, Kenya- Rift
.
Degree: 2011, University of Nairobi
URL: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9987
► This project describes the analysis carried out in the Olobanita well-field, Nakuru county, Kenya, using geophysical surveys and geologic logs with an aim of investigating…
(more)
▼ This project describes the analysis carried out in the Olobanita well-field, Nakuru county,
Kenya, using geophysical surveys and geologic logs with an aim of investigating the
geometry and lithology responsible for collapsing of boreholes in the Olobanita well field.
This has been a major setback in an effort to provide water from the ground water rich basin.
In this case therefore, the project employ geophysical surveys and geologic logs to
explicitly investigate and characterize the subsurface responsible for the drilling menace
recently encountered by Zhonghao Overseas Construction Engineering Company Ltd.
Geophysical surveys used include, Vertical electrical sounding (VES), Electrical resistivity
imaging (ERI) and ground magnetic measurements. The vertical electrical sounding was done
using the SYSCAL R2 equipment in the Schlumberger electrode configuration, electrical
resistivity imaging involved the SYSCAL R1 switch 72 resistivity equipment and magnetic
measurements utilized the proton precession magnetometer.
Results obtained from the geophysical survey were then analysed and related to borehole
log information of Olobanita well-field, this has revealed some correspondence between
lithostratigraphic units and resistivity values.
From the results obtained it is true that the prominent fault systems within the basin
alongside the heterogeneity of the ground coupled with the soft loose volcano-sediments are
greatly responsible for the collapsing of freshly drilled boreholes in the area. Finally several
recommendations are made to reduce or to completely avoid caving in of boreholes during
and after drilling
Subjects/Keywords: Geometry;
lithology;
boreholes;
Olobanita well-field, Kenya- Rift
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APA ·
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Export
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APA (6th Edition):
OGEU, O. E. (2011). Geometry and lithology of the subsurface responsible for collapsing of boreholes in Olobanita well-field, Kenya- Rift
. (Thesis). University of Nairobi. Retrieved from http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
OGEU, ONYANGO EDWIN. “Geometry and lithology of the subsurface responsible for collapsing of boreholes in Olobanita well-field, Kenya- Rift
.” 2011. Thesis, University of Nairobi. Accessed April 11, 2021.
http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
OGEU, ONYANGO EDWIN. “Geometry and lithology of the subsurface responsible for collapsing of boreholes in Olobanita well-field, Kenya- Rift
.” 2011. Web. 11 Apr 2021.
Vancouver:
OGEU OE. Geometry and lithology of the subsurface responsible for collapsing of boreholes in Olobanita well-field, Kenya- Rift
. [Internet] [Thesis]. University of Nairobi; 2011. [cited 2021 Apr 11].
Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
OGEU OE. Geometry and lithology of the subsurface responsible for collapsing of boreholes in Olobanita well-field, Kenya- Rift
. [Thesis]. University of Nairobi; 2011. Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/9987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
14.
Lörtzer, G.J.M.
An integrated approach to lithological inversion: Bayesian inversion of seismic velocities and density in terms of rock and pore parameters.
Degree: 1990, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a
;
urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a
;
urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a
;
http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a
Subjects/Keywords: Seismology; lithology; Bayesian inversion
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APA ·
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Export
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Manager
APA (6th Edition):
Lörtzer, G. J. M. (1990). An integrated approach to lithological inversion: Bayesian inversion of seismic velocities and density in terms of rock and pore parameters. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a
Chicago Manual of Style (16th Edition):
Lörtzer, G J M. “An integrated approach to lithological inversion: Bayesian inversion of seismic velocities and density in terms of rock and pore parameters.” 1990. Doctoral Dissertation, Delft University of Technology. Accessed April 11, 2021.
http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a.
MLA Handbook (7th Edition):
Lörtzer, G J M. “An integrated approach to lithological inversion: Bayesian inversion of seismic velocities and density in terms of rock and pore parameters.” 1990. Web. 11 Apr 2021.
Vancouver:
Lörtzer GJM. An integrated approach to lithological inversion: Bayesian inversion of seismic velocities and density in terms of rock and pore parameters. [Internet] [Doctoral dissertation]. Delft University of Technology; 1990. [cited 2021 Apr 11].
Available from: http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a.
Council of Science Editors:
Lörtzer GJM. An integrated approach to lithological inversion: Bayesian inversion of seismic velocities and density in terms of rock and pore parameters. [Doctoral Dissertation]. Delft University of Technology; 1990. Available from: http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; urn:NBN:nl:ui:24-uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a ; http://resolver.tudelft.nl/uuid:5cf42977-25cc-4e99-bd5c-8a760469ac1a
University of New Mexico
15.
Milazzo, Damien M.
RADIONUCLIDES IN RAINWATER AND THEIR IMPACT ON BACKGROUND RADIATION.
Degree: Department of Earth and Planetary Sciences, 2018, University of New Mexico
URL: https://digitalrepository.unm.edu/eps_etds/247
► Radioactive waste has accrued throughout the continental United States and in the Oceans surrounding the country. Significant quantities of the waste are poorly documented…
(more)
▼ Radioactive waste has accrued throughout the continental United States and in the Oceans surrounding the country. Significant quantities of the waste are poorly documented regarding their location and the radioisotopes contained in the waste. Locating the waste is not an easy matter, as its locations are not well documented, and its method of disposal may be covered with plants, soils, and sediments. A common tool used to locate the waste is a gamma spectrometer, which measure the gamma emissions spectrum of radionuclides. The effectiveness of this tool when utilized to locate gamma emitting waste may be reduced due to the presence of various waters. Of the types of waters that may be present, including groundwater, rivers, floodwaters, rainwater, etc., rainwater may present the most significant obstacle. While all waters cause a degree of attenuation, rainwater will also introduce additional radionuclides into the area, increasing the quantity of gamma emissions present, and obscuring the signal that the wastes emit. Rainwater has been found to increase the quantity of gamma emissions by as much as 20% over the emissions present in the absence of rainwater. Depending on the radionuclides present in the waste, this may present a significant obstacle to accurately locating the waste.
Advisors/Committee Members: Louis Scuderi, Gary S. Weissman, Jonathan Dowell.
Subjects/Keywords: gamma radiation spectrometer rain new mexico lithology; Geology
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APA (6th Edition):
Milazzo, D. M. (2018). RADIONUCLIDES IN RAINWATER AND THEIR IMPACT ON BACKGROUND RADIATION. (Masters Thesis). University of New Mexico. Retrieved from https://digitalrepository.unm.edu/eps_etds/247
Chicago Manual of Style (16th Edition):
Milazzo, Damien M. “RADIONUCLIDES IN RAINWATER AND THEIR IMPACT ON BACKGROUND RADIATION.” 2018. Masters Thesis, University of New Mexico. Accessed April 11, 2021.
https://digitalrepository.unm.edu/eps_etds/247.
MLA Handbook (7th Edition):
Milazzo, Damien M. “RADIONUCLIDES IN RAINWATER AND THEIR IMPACT ON BACKGROUND RADIATION.” 2018. Web. 11 Apr 2021.
Vancouver:
Milazzo DM. RADIONUCLIDES IN RAINWATER AND THEIR IMPACT ON BACKGROUND RADIATION. [Internet] [Masters thesis]. University of New Mexico; 2018. [cited 2021 Apr 11].
Available from: https://digitalrepository.unm.edu/eps_etds/247.
Council of Science Editors:
Milazzo DM. RADIONUCLIDES IN RAINWATER AND THEIR IMPACT ON BACKGROUND RADIATION. [Masters Thesis]. University of New Mexico; 2018. Available from: https://digitalrepository.unm.edu/eps_etds/247
16.
Marino, Emily Bradshaw.
Isolating lithologic controls on landscape morphology in the Guadalupe Mountains, New Mexico and Texas.
Degree: MSin Geological Sciences, Geological sciences, 2017, University of Texas – Austin
URL: http://hdl.handle.net/2152/61568
► In many geomorphic studies, lithologic contrasts are often acknowledged as important for landscape form, but are otherwise ignored in attempts to infer tectonic forcing or…
(more)
▼ In many geomorphic studies, lithologic contrasts are often acknowledged as important for landscape form, but are otherwise ignored in attempts to infer tectonic forcing or climatic control from topography. It remains difficult to separate the effects of tectonics, climate, and
lithology due to the limitations of commonly used landscape evolution models. Tectonic inactivity and relatively little spatial variability in climate make the Guadalupe Mountains of Texas and New Mexico an ideal site to isolate and investigate the effects of
lithology on topography. To assess the control of
lithology, I compared topographic metrics including channel steepness index, channel concavity, and topographic relief in different mapped lithologic units across the region. Topographic metrics were calculated using elevation data extracted from USGS 10m Digital Elevation Models. These metrics were grouped spatially based on 23 regionally mapped lithologic units, including abundant limestone and dolomite with some evaporites, sandstone, and shale. To better evaluate the different rock units, I used published unit descriptions to develop a simple, semi-quantitative system to estimate the relative durability rating (RDR) of each rock unit. This rating system accounts for rock type and other rock properties such as relative bed thicknesses or spatial heterogeneity. RDR values were found to be correlated with unit-averaged channel steepness for each of the 23 lithologies in the region. Channel steepness shows a moderate correlation with RDR (R² = 0.44; Kendall’s 𝜏 = 0.52), demonstrating quantifiable control on landscape form. However, concavity does not show a significant correlation (R² = 0.016; Kendall’s 𝜏 = 0.13). Stratigraphic relationships among units suggest that thick, resistant reef deposits exert the main lithologic control on overall channel forms in the region. Less resistant units stratigraphically below these reef deposits generally have higher than expected steepness given their RDR. Units at the bottom typically have high concavity values as well. The opposite is true for weaker units stratigraphically above the resistant reef formations, which have lower steepness and higher convexity. The contrasting influence of strong units above or below weaker units and their observed effects on channel form should improve our ability to infer rock properties from topography, and to predict the evolution of landscapes with lithologic variability.
Advisors/Committee Members: Johnson, Joel P. (advisor).
Subjects/Keywords: Geomorphology; Lithology; Guadalupe Mountains
…97
ix
List of Tables
Table 1:
Lithology of the Guadalupe Mountians and Relative… …Figure 6:
Map of Lithology… …43
Figure 19:
(a) Map of Lithology and ksn in Southern Reef Rim… …47
Figure 20:
(a) Map of Lithology and ksn in North-Central Reef Rim… …50
Figure 21:
(a) Map of Lithology and ksn in The Algerita Escarpment
xi
and…
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APA (6th Edition):
Marino, E. B. (2017). Isolating lithologic controls on landscape morphology in the Guadalupe Mountains, New Mexico and Texas. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/61568
Chicago Manual of Style (16th Edition):
Marino, Emily Bradshaw. “Isolating lithologic controls on landscape morphology in the Guadalupe Mountains, New Mexico and Texas.” 2017. Masters Thesis, University of Texas – Austin. Accessed April 11, 2021.
http://hdl.handle.net/2152/61568.
MLA Handbook (7th Edition):
Marino, Emily Bradshaw. “Isolating lithologic controls on landscape morphology in the Guadalupe Mountains, New Mexico and Texas.” 2017. Web. 11 Apr 2021.
Vancouver:
Marino EB. Isolating lithologic controls on landscape morphology in the Guadalupe Mountains, New Mexico and Texas. [Internet] [Masters thesis]. University of Texas – Austin; 2017. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/2152/61568.
Council of Science Editors:
Marino EB. Isolating lithologic controls on landscape morphology in the Guadalupe Mountains, New Mexico and Texas. [Masters Thesis]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/61568
Western Kentucky University
17.
Creech, Zachary Dalton.
Lithological Character and Sequence Stratigraphy of the Ste. Genevieve Limestone in Western Kentucky.
Degree: MS, Department of Geography and Geology, 2019, Western Kentucky University
URL: https://digitalcommons.wku.edu/theses/3469
► The Ste. Genevieve Limestone is a Mississippian-aged, carbonate-dominated stratigraphic unit that is a prominent hydrocarbon producer in the Illinois Basin, and is widely distributed…
(more)
▼ The Ste. Genevieve Limestone is a Mississippian-aged, carbonate-dominated stratigraphic unit that is a prominent hydrocarbon producer in the Illinois Basin, and is widely distributed in states such as Missouri, Kentucky, Indiana, and Illinois. There has been relatively limited study focused on characterizing the Ste. Genevieve Limestone in terms of lithofacies, stacking patterns, and sequence stratigraphic context via analysis of roadcut exposures of the unit in western Kentucky.
The focus of this study is to use lithologic data collected from roadcuts and draft these data into cross sections for presentation of detailed stratigraphic columns that are locally correlative. Seven roadcuts were used in the study, five in Warren County Kentucky and two in Barren County Kentucky. The goal of this study is to characterize the lithofacies, stacking patterns, and sequence stratigraphy of the Ste. Genevieve Limestone. Another goal is to identify intervals in the unit that have a high potential to be hydrocarbon reservoirs and by extension, determine associated rocks that may function as seals or traps for reservoirs.
The results of this study show that the characteristics of the Ste. Genevieve Limestone in western Kentucky are:
Roadcut consists of three stratigraphically distinct stacking patterns: 1) alternating coarse-grained units and fine-grained units, 2) a backstepping, retrogradational,shoal-building pattern, and 3) static, thick coarse-grained intervals.
The roadcuts are dominated by limestone units, with coarse intervals consisting of mainly skeletal-ooid grainstones and fine-grained intervals representative of mudstones and wackestones.
Dolomitized limestone is present, with dolomitized mudstone making up the majority of dolomitic units and fine-grain units in general.
Oolitic and skeletal units are the most ideal hydrocarbon reservoir rocks in the roadcuts with paleokarst intervals such as brecciated limestone also being viable potential reservoirs.
The presence of thick skeletal and skeletal-ooid grainstones are indicative of High Stand System Tracts (HSTs), which make up the majority of roadcut exposures and brecciated limestone in contrast, is indicative of a Falling Stage System Tract (FSST).
Overall, the rocks exposed in the roadcuts are representative of shoal or shoaling upward environments yet possess localized partitioning of units based on identification of depositional and diagenetic facies changes.
Advisors/Committee Members: Michael T. May (DIrector), Patricia Kambesis, Fredrick D. Siewers.
Subjects/Keywords: sedimentology geology lithology; Geology; Oil, Gas, and Energy; Sedimentology; Stratigraphy
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APA (6th Edition):
Creech, Z. D. (2019). Lithological Character and Sequence Stratigraphy of the Ste. Genevieve Limestone in Western Kentucky. (Masters Thesis). Western Kentucky University. Retrieved from https://digitalcommons.wku.edu/theses/3469
Chicago Manual of Style (16th Edition):
Creech, Zachary Dalton. “Lithological Character and Sequence Stratigraphy of the Ste. Genevieve Limestone in Western Kentucky.” 2019. Masters Thesis, Western Kentucky University. Accessed April 11, 2021.
https://digitalcommons.wku.edu/theses/3469.
MLA Handbook (7th Edition):
Creech, Zachary Dalton. “Lithological Character and Sequence Stratigraphy of the Ste. Genevieve Limestone in Western Kentucky.” 2019. Web. 11 Apr 2021.
Vancouver:
Creech ZD. Lithological Character and Sequence Stratigraphy of the Ste. Genevieve Limestone in Western Kentucky. [Internet] [Masters thesis]. Western Kentucky University; 2019. [cited 2021 Apr 11].
Available from: https://digitalcommons.wku.edu/theses/3469.
Council of Science Editors:
Creech ZD. Lithological Character and Sequence Stratigraphy of the Ste. Genevieve Limestone in Western Kentucky. [Masters Thesis]. Western Kentucky University; 2019. Available from: https://digitalcommons.wku.edu/theses/3469
University of Sydney
18.
Fuentes, Ignacio.
Potential for a Managed Aquifer Recharge (MAR) project in the Namoi basin, Australia
.
Degree: 2020, University of Sydney
URL: http://hdl.handle.net/2123/23016
► This thesis evaluated the potential for managed aquifer recharge (MAR) in the Namoi basin. The catchment was hydrologically characterised. Several studies combining remote sensing and…
(more)
▼ This thesis evaluated the potential for managed aquifer recharge (MAR) in the Namoi basin. The catchment was hydrologically characterised. Several studies combining remote sensing and hydrologic information were carried out. The first study sought to study the open water evaporation at the catchment scale, and the long-term changes in rainfall, temperatures, humidity, and reference evapotranspiration. These present evidence of a general intensification on the water cycle and a reduction in the frequency of surface water, leading to less lumped evaporation, but increasing evaporation per unit surface. This justifies the implementation of alternative water storage methods, such as MAR. Likewise, spatiotemporal patterns of flooding in the catchment and their frequency were studied considering the water surplus from those events as a key aspect for the development of a MAR project. Thus, algorithms for water volume quantification during floods and the frequency of such events were also evaluated. The groundwater flow medium was studied using natural language processing (NLP). An NLP model specific for geosciences was developed. This demonstrated to be more effective than general domain models in characterising the multidimensional space between concepts of a specific domain. Using this model, lithological descriptions from boreholes were classified and interpolated to build 3D lithological models. These allowed characterising the hydrogeological setting in the region. Lastly, suitability areas for MAR projects were mapped using hydrological, hydrogeological, and lithological characteristics in the catchment. These maps were validated through the study of groundwater recharge in an area of interest selected by its high suitability. However, the potential for the development of such projects is ultimately limited by current water regulations and water entitlements.
Subjects/Keywords: Managed aquifer recharge;
Hydrology;
Water management;
Remote sensing;
Lithology
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APA (6th Edition):
Fuentes, I. (2020). Potential for a Managed Aquifer Recharge (MAR) project in the Namoi basin, Australia
. (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/23016
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fuentes, Ignacio. “Potential for a Managed Aquifer Recharge (MAR) project in the Namoi basin, Australia
.” 2020. Thesis, University of Sydney. Accessed April 11, 2021.
http://hdl.handle.net/2123/23016.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fuentes, Ignacio. “Potential for a Managed Aquifer Recharge (MAR) project in the Namoi basin, Australia
.” 2020. Web. 11 Apr 2021.
Vancouver:
Fuentes I. Potential for a Managed Aquifer Recharge (MAR) project in the Namoi basin, Australia
. [Internet] [Thesis]. University of Sydney; 2020. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/2123/23016.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fuentes I. Potential for a Managed Aquifer Recharge (MAR) project in the Namoi basin, Australia
. [Thesis]. University of Sydney; 2020. Available from: http://hdl.handle.net/2123/23016
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universiteit Utrecht
19.
Bekkers, M.N.
Geomorphological development of Zakynthos, Greece
Relating geomorphology and artefact distribution.
Degree: 2011, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/204637
► This study was conducted within an archaeology project and was done to provide some insights to the relation between artefact distribution/ origin and geomorphological development…
(more)
▼ This study was conducted within an archaeology project and was done to provide some insights to
the relation between artefact distribution/ origin and geomorphological development during the late
Pleistocene and Holocene. Geological, lithological and geomorphological research showed several
distinguishable landscape units. In the western part of the study area a swamp is present that used
to be a lake, which can be seen as a favorable location for ancient human settlement. Besides this
geomorphology focused research, also archaeological surveys have been done around this swamp
and at some main locations of interest north of the swamp (e.g. Kamaroti hill). This study concluded
that the artefact distribution along Kamaroti hill can be related with a former marine environment that
was implicated by lithological research. However, the headward erosion of the walls of the highly
abundant agricultural terraces in the study area caused exposure of artefacts through time. This is
one of the reasons for the archaeologically complexity of the scattering of artefact distribution. Thick
accumulations of terra rossa between a relative isolated region between the mountains in the western
part of the study area were related with ancient soil erosion on the mountain slopes and the subsequent
colluvial transport to these sediment catches.
Advisors/Committee Members: Sterk, G..
Subjects/Keywords: Geowetenschappen; archaeology, Zakynthos, erosion, sedimentation, uplift, coastal terrace, corings, swamp, Holocene, lithology
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APA (6th Edition):
Bekkers, M. N. (2011). Geomorphological development of Zakynthos, Greece
Relating geomorphology and artefact distribution. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/204637
Chicago Manual of Style (16th Edition):
Bekkers, M N. “Geomorphological development of Zakynthos, Greece
Relating geomorphology and artefact distribution.” 2011. Masters Thesis, Universiteit Utrecht. Accessed April 11, 2021.
http://dspace.library.uu.nl:8080/handle/1874/204637.
MLA Handbook (7th Edition):
Bekkers, M N. “Geomorphological development of Zakynthos, Greece
Relating geomorphology and artefact distribution.” 2011. Web. 11 Apr 2021.
Vancouver:
Bekkers MN. Geomorphological development of Zakynthos, Greece
Relating geomorphology and artefact distribution. [Internet] [Masters thesis]. Universiteit Utrecht; 2011. [cited 2021 Apr 11].
Available from: http://dspace.library.uu.nl:8080/handle/1874/204637.
Council of Science Editors:
Bekkers MN. Geomorphological development of Zakynthos, Greece
Relating geomorphology and artefact distribution. [Masters Thesis]. Universiteit Utrecht; 2011. Available from: http://dspace.library.uu.nl:8080/handle/1874/204637
University of Manchester
20.
Ashton, Nicola Jane.
Holistic characterisation of soils developed on contrasting lithologies, in a temperate climate.
Degree: PhD, 2014, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/holistic-characterisation-of-soils-developed-on-contrasting-lithologies-in-a-temperate-climate(3e0b006c-60f5-4814-8f2a-101c2b9c7bba).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.626971
► The influence of parent lithology on the development of soil biogeochemical environments and their microbial diversity is explored by characterising soil profiles with respect to…
(more)
▼ The influence of parent lithology on the development of soil biogeochemical environments and their microbial diversity is explored by characterising soil profiles with respect to their mineral, solution and organic chemistry. Soil profiles were collected from a total of 17 sites, above basalt, granodiorite, shale, sandstone and limestone, across Northern Ireland. The soil system developed above basalt was examined to assess the development of soil bio-physicochemical properties and microbial diversity through the profile. These basalt soils showed two distinct horizons have developed in the previous 15’000 years, where soils from the top 20 cm of the profile were highly influenced by the interactions of soil minerals with soil organic and biological processes. In line with the observed differences in soil properties the microbial community structure varied; in the surface soils the community composition was dominated by root-associated bacteria. However the relative abundance of phyla affiliated with nutrient-limited conditions increased in samples from the base of the profile. Detailed examination of the soil profiles above granodiorite, shale, sandstone and limestone revealed large variations in soil geochemistry between profiles, reflecting the mineral geochemistry of the parent rock. Molecular analysis of SOM revealed compositional changes with depth were comparable between profiles; however TOC concentrations were consistently higher in the soil profiles above basalt suggesting greater stabilisation of SOM in these soils. The chemistry of the soil waters was not reflective of the parent rocks; however variations in soil texture, specifically the abundance of less reactive residual minerals in the sandstone and limestone soils, led to higher concentrations of soluble elements in these soils. Soil pH and DOC were found to have a large control on buffering the release of free Al, Cr and Fe ions into solution. The microbial communities in near-surface soils were similar to each other, regardless of lithology, and were dominated by Proteobacteria, Actinobacteria, and Acidobacteria. However microbial diversity shifted with depth; the abundance of Actinobacteria decreased and Nitrospirae increased, and between rock types where soils next to the basalt, shale and granodiorite bedrock contained sequences affiliated with novel Candidate Phyla AD3 and GAL15. In these soils differences in SOM composition were the main driver of the observed variation with depth, however where labile SOM was depleted, mineral and solution geochemistry may have a larger control on the community composition. To assess the influence of parent lithology on selenium mobility, soils above basalt and granodiorite were amended with sodium selenate. Under anaerobic conditions, the proportion of soluble selenate removed varied (39-77 %) depending on the sample through a combination of abiotic and microbial reduction processes. However, under aerobic conditions, larger concentrations of selenate remained in solution (79-100%).
Subjects/Keywords: 551.9; Soil; Soil Geochemistry; Soil Parent Lithology; Soil Organic Matter; Microbial Diversity; Soil Waters; Selenium
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APA ·
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APA (6th Edition):
Ashton, N. J. (2014). Holistic characterisation of soils developed on contrasting lithologies, in a temperate climate. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/holistic-characterisation-of-soils-developed-on-contrasting-lithologies-in-a-temperate-climate(3e0b006c-60f5-4814-8f2a-101c2b9c7bba).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.626971
Chicago Manual of Style (16th Edition):
Ashton, Nicola Jane. “Holistic characterisation of soils developed on contrasting lithologies, in a temperate climate.” 2014. Doctoral Dissertation, University of Manchester. Accessed April 11, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/holistic-characterisation-of-soils-developed-on-contrasting-lithologies-in-a-temperate-climate(3e0b006c-60f5-4814-8f2a-101c2b9c7bba).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.626971.
MLA Handbook (7th Edition):
Ashton, Nicola Jane. “Holistic characterisation of soils developed on contrasting lithologies, in a temperate climate.” 2014. Web. 11 Apr 2021.
Vancouver:
Ashton NJ. Holistic characterisation of soils developed on contrasting lithologies, in a temperate climate. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Apr 11].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/holistic-characterisation-of-soils-developed-on-contrasting-lithologies-in-a-temperate-climate(3e0b006c-60f5-4814-8f2a-101c2b9c7bba).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.626971.
Council of Science Editors:
Ashton NJ. Holistic characterisation of soils developed on contrasting lithologies, in a temperate climate. [Doctoral Dissertation]. University of Manchester; 2014. Available from: https://www.research.manchester.ac.uk/portal/en/theses/holistic-characterisation-of-soils-developed-on-contrasting-lithologies-in-a-temperate-climate(3e0b006c-60f5-4814-8f2a-101c2b9c7bba).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.626971
University of Edinburgh
21.
Harries, Rebekah Maud.
Geomorphic complexity in the stratigraphic record : the importance of sediment storage and recycling in real landscapes.
Degree: PhD, 2019, University of Edinburgh
URL: http://hdl.handle.net/1842/35535
► The sedimentary record preserves a history of erosion in upland catchments. It is the refore key to deciphering the topographic evolution of the Earth's surface…
(more)
▼ The sedimentary record preserves a history of erosion in upland catchments. It is the refore key to deciphering the topographic evolution of the Earth's surface in response to climatic and tectonic change. However, an ability to make sensitive inversions of landscape evolution from this record is currently limited as we do not yet understand how the geomorphic evolution of depositional systems impacts their long term mass balance at geological timescales. Physical parameters such as grain size and composition, which are frequently used to reconstruct the evolution of landscapes, are deposited by dynamic river systems that have highly non-linear responses to external forcing at geomorphic timescales. This thesis explores the complexity of sediment dynamics in active source to sink systems and evaluate the extent to which sediment grain size and composition records tectonic, climatic and autogenic forcing. The research focuses on three large catchment alluvial fan systems within the arid south-central Argentine Andes, a landscape dominated by physical transport processes. To characterise the sediment exported from the Frontal Cordillera and to map the spatial distribution of sediment in the Iglesia basin, the size and composition of clasts deposited along the length of three alluvial fans was measured. These datasets are used to investigate three key questions: (1) What controls sorting on alluvial fans? (2) Are downstream grain size fining trends on alluvial fans sensitive to their catchment sediment flux and basin structure? (3) Do riverbed gravels provide a spatially integrated sample of erosional processes in their upstream mountain catchments?
Subjects/Keywords: alluvial fan; Andes; bedload transport; gravel; stratigraphy; grain size fining; climate; tectonics; lithology; rivers
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APA (6th Edition):
Harries, R. M. (2019). Geomorphic complexity in the stratigraphic record : the importance of sediment storage and recycling in real landscapes. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/35535
Chicago Manual of Style (16th Edition):
Harries, Rebekah Maud. “Geomorphic complexity in the stratigraphic record : the importance of sediment storage and recycling in real landscapes.” 2019. Doctoral Dissertation, University of Edinburgh. Accessed April 11, 2021.
http://hdl.handle.net/1842/35535.
MLA Handbook (7th Edition):
Harries, Rebekah Maud. “Geomorphic complexity in the stratigraphic record : the importance of sediment storage and recycling in real landscapes.” 2019. Web. 11 Apr 2021.
Vancouver:
Harries RM. Geomorphic complexity in the stratigraphic record : the importance of sediment storage and recycling in real landscapes. [Internet] [Doctoral dissertation]. University of Edinburgh; 2019. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1842/35535.
Council of Science Editors:
Harries RM. Geomorphic complexity in the stratigraphic record : the importance of sediment storage and recycling in real landscapes. [Doctoral Dissertation]. University of Edinburgh; 2019. Available from: http://hdl.handle.net/1842/35535
Delft University of Technology
22.
Feng, R.
Reservoir lithology determination from seismic inversion results using markov processes.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
;
urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
;
f6d01dfc-9267-4a21-8432-8a6a1eb30daa
;
10.4233/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
;
urn:isbn:978-94-6186-864-0
;
urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
;
http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
► For reservoir characterization, the subsurface heterogeneity needs to be qualified in which the distribution of lithologies is an essential part since it determines the location…
(more)
▼ For reservoir characterization, the subsurface heterogeneity needs to be qualified in which the distribution of lithologies is an essential part since it determines the location and migration paths of hydrocarbons. Preliminary analysis of well-log data could help to identify various lithologies in a one-dimensional direction (depth), while the lateral information is missing because of the sparse locations. On the other hand, a larger areal coverage of the target reservoir could be provided by seismic data, and from the inversion thereof, inferences of lithologies could be made. However, just like other geophysical inversions, translation of seismic inversion results to these categorical variables (lithologies) is a non-unique problem, which means that different lithologies could produce the same, or similar, property responses. In order to mitigate this problem, geological prior information should be introduced in the sense of Bayes’ theorem. Thus, the main motivation for this thesis is to investigate the usage of geological prior information in the classification of reservoir lithologies from properties obtained from seismic inversion. Different methods have been tried in this process in order to fully understand their performances and to make comparisons.
Advisors/Committee Members: Luthi, S.M., Drijkoningen, G.G., Delft University of Technology.
Subjects/Keywords: seismic inversion; Markov processes; reservoir lithology
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APA (6th Edition):
Feng, R. (2017). Reservoir lithology determination from seismic inversion results using markov processes. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; 10.4233/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:isbn:978-94-6186-864-0 ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
Chicago Manual of Style (16th Edition):
Feng, R. “Reservoir lithology determination from seismic inversion results using markov processes.” 2017. Doctoral Dissertation, Delft University of Technology. Accessed April 11, 2021.
http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; 10.4233/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:isbn:978-94-6186-864-0 ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa.
MLA Handbook (7th Edition):
Feng, R. “Reservoir lithology determination from seismic inversion results using markov processes.” 2017. Web. 11 Apr 2021.
Vancouver:
Feng R. Reservoir lithology determination from seismic inversion results using markov processes. [Internet] [Doctoral dissertation]. Delft University of Technology; 2017. [cited 2021 Apr 11].
Available from: http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; 10.4233/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:isbn:978-94-6186-864-0 ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa.
Council of Science Editors:
Feng R. Reservoir lithology determination from seismic inversion results using markov processes. [Doctoral Dissertation]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; 10.4233/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; urn:isbn:978-94-6186-864-0 ; urn:NBN:nl:ui:24-uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa ; http://resolver.tudelft.nl/uuid:f6d01dfc-9267-4a21-8432-8a6a1eb30daa
University of Texas – Austin
23.
-6479-2199.
Sedimentology and reservoir characterization of the Upper Pennsylvanian Cline Shale, Midland Basin, Texas.
Degree: MSin Geological Sciences, Geological sciences, 2016, University of Texas – Austin
URL: http://hdl.handle.net/2152/44423
► The Cline Shale, an organic rich mudrock comprising the Canyon and Cisco Groups in the Midland Basin, has recently become an exploration target and production…
(more)
▼ The Cline Shale, an organic rich mudrock comprising the Canyon and Cisco Groups in the Midland Basin, has recently become an exploration target and production interval. The Cline is a basin-restricted facies specific to the Midland Basin, and is interpreted to have been deposited in a deep water environment by hemipelagic suspension and mass transport debris flow and turbidity flow. Based on core description, thin section observation, and bulk compositional XRD data carried out on seven cores, seven lithofacies have been identified including various types of clay-rich mudstone, carbonate and sandstone. Regional stratigraphic sections show that the Cline structurally dips towards the Central Basin Platform and ranges from 117 ft to 530 ft in thickness.
Gamma-ray log patterns can indicate vertical changes in
lithology by responding to clay content and organic matter. Two types of cycles in the Midland Basin are identified by upward-increasing and upward-decreasing gamma ray patterns. Cycles in the Midland Basin are correlated to those on the shelf, and are interpreted to correspond to sea level changes on the shelf. Fifteen stratigraphic cycles have been distinguished from a typical basin center core, where eight are in the Lower Cline and seven are in the Upper Cline. These cycles are laterally continuous across the Midland Basin. More stratigraphic cycles can be recognized near the toe of slope, because not all the depositions occurred within a cycle extend across the basin floor. It is inferred from correlation of gamma ray patterns that high-frequency sea-level fluctuation affected depositional processes on the platform and controlled sediment deposition in the basin.
Wireline logs are a crucial tool for providing a quantitative evaluation of reservoir quality. The Cline pay zone is defined based on (1) Gamma ray>110 API, (2) Density porosity (DPHI)>3.4%, (3) TOC>2.0 wt.%. The possible exploration target is located in northern Glasscock, western Howard and southern Martin counties. The pay zone thickness varies from 50 ft to 100 ft. The average TOC of pay zones is greater than 2.5 wt.% and the average dry helium porosity is greater than 5.0%.
Advisors/Committee Members: Fisher, W. L. (William Lawrence), 1932- (advisor), Fu, Qilong (advisor), Kerans, Charles (committee member), Hamlin, H. Scott (committee member).
Subjects/Keywords: Cline Shale; Wolfcampian D shale; Midland Basin; Texas; Stratigraphy; Lithology; Depositional environment; Reservoir characteristization
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APA (6th Edition):
-6479-2199. (2016). Sedimentology and reservoir characterization of the Upper Pennsylvanian Cline Shale, Midland Basin, Texas. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/44423
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-6479-2199. “Sedimentology and reservoir characterization of the Upper Pennsylvanian Cline Shale, Midland Basin, Texas.” 2016. Masters Thesis, University of Texas – Austin. Accessed April 11, 2021.
http://hdl.handle.net/2152/44423.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-6479-2199. “Sedimentology and reservoir characterization of the Upper Pennsylvanian Cline Shale, Midland Basin, Texas.” 2016. Web. 11 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-6479-2199. Sedimentology and reservoir characterization of the Upper Pennsylvanian Cline Shale, Midland Basin, Texas. [Internet] [Masters thesis]. University of Texas – Austin; 2016. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/2152/44423.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-6479-2199. Sedimentology and reservoir characterization of the Upper Pennsylvanian Cline Shale, Midland Basin, Texas. [Masters Thesis]. University of Texas – Austin; 2016. Available from: http://hdl.handle.net/2152/44423
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
24.
Graciolli, Vinicius Medeiros.
A novel classification method applied to well log data calibrated by ontology based core descriptions.
Degree: 2018, Brazil
URL: http://hdl.handle.net/10183/174993
► Um método para a detecção automática de tipos litológicos e contato entre camadas foi desenvolvido através de uma combinação de análise estatística de um conjunto…
(more)
▼ Um método para a detecção automática de tipos litológicos e contato entre camadas foi desenvolvido através de uma combinação de análise estatística de um conjunto de perfis geofísicos de poços convencionais, calibrado por descrições sistemáticas de testemunhos. O objetivo deste projeto é permitir a integração de dados de rocha em modelos de reservatório. Os testemunhos são descritos com o suporte de um sistema de nomenclatura baseado em ontologias que formaliza extensamente uma grande gama de atributos de rocha. As descrições são armazenadas em um banco de dados relacional junto com dados de perfis de poço convencionais de cada poço analisado. Esta estrutura permite definir protótipos de valores de perfil combinados para cada litologia reconhecida através do cálculo de média e dos valores de variância e covariância dos valores medidos por cada ferramenta de perfilagem para cada litologia descrita nos testemunhos. O algoritmo estatístico é capaz de
aprender com cada novo testemunho e valor de log adicionado ao banco de dados, refinando progressivamente a identificação litológica. A detecção de contatos litológicos é realizada através da suavização de cada um dos perfis através da aplicação de duas médias móveis de diferentes tamanhos em cada um dos perfis. Os resultados de cada par de perfis suavizados são comparados, e as posições onde as linhas se cruzam definem profundidades onde ocorrem mudanças bruscas no valor do perfil, indicando uma potencial mudança de litologia. Os resultados da aplicação desse método em cada um dos perfis são então unificados em uma única avaliação de limites litológicos Os valores de média e variância-covariância derivados da correlação entre testemunhos e perfis são então utilizados na construção de uma distribuição gaussiana n-dimensional para cada uma das litologias reconhecidas. Neste ponto, probabilidades a priori também são calculadas para cada litologia. Estas distribuições são comparadas
contra cada um dos intervalos litológicos previamente detectados por meio de uma função densidade de probabilidade, avaliando o quão perto o intervalo está de cada litologia e permitindo a atribuição de um tipo litológico para cada intervalo. O método desenvolvido foi testado em um grupo de poços da bacia de Sergipe- Alagoas, e a precisão da predição atingida durante os testes mostra-se superior a algoritmos clássicos de reconhecimento de padrões como redes neurais e classificadores KNN. O método desenvolvido foi então combinado com estes métodos clássicos em um sistema multi-agentes. Os resultados mostram um potencial significante para aplicação operacional efetiva na construção de modelos geológicos para a exploração e desenvolvimento de áreas com grande volume de dados de perfil e intervalos testemunhados.
A method for the automatic detection of lithological types and layer contacts was developed through the combined statistical analysis of a suite of conventional wireline
logs, calibrated by the systematic description of cores. The intent of this project is to allow the integration of rock…
Advisors/Committee Members: Abel, Mara.
Subjects/Keywords: Geoinformática; Banco : Dados; Core-log integration; Geophysical log; Core description; Lithology interpretation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Graciolli, V. M. (2018). A novel classification method applied to well log data calibrated by ontology based core descriptions. (Masters Thesis). Brazil. Retrieved from http://hdl.handle.net/10183/174993
Chicago Manual of Style (16th Edition):
Graciolli, Vinicius Medeiros. “A novel classification method applied to well log data calibrated by ontology based core descriptions.” 2018. Masters Thesis, Brazil. Accessed April 11, 2021.
http://hdl.handle.net/10183/174993.
MLA Handbook (7th Edition):
Graciolli, Vinicius Medeiros. “A novel classification method applied to well log data calibrated by ontology based core descriptions.” 2018. Web. 11 Apr 2021.
Vancouver:
Graciolli VM. A novel classification method applied to well log data calibrated by ontology based core descriptions. [Internet] [Masters thesis]. Brazil; 2018. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/10183/174993.
Council of Science Editors:
Graciolli VM. A novel classification method applied to well log data calibrated by ontology based core descriptions. [Masters Thesis]. Brazil; 2018. Available from: http://hdl.handle.net/10183/174993
Addis Ababa University
25.
ABERA, FANTAYE WELDEMARIAM.
MAPPING HYDROTHERMALLY ALTERED ROCKS AND LINEAMENT ANALYSIS THROUGH DIGITAL ENHANCEMENT OF ASTER DATA CASE STUDY: KEMASHI AREA, WESTERN ETHIOPIA
.
Degree: 2012, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/821
► Hydrothermal alteration, structure and geology of the Kemashi area, western Ethiopia have been studied by means of remote sensing techniques and limited field data. Advanced…
(more)
▼ Hydrothermal alteration, structure and geology of the Kemashi area, western Ethiopia
have been studied by means of remote sensing techniques and limited field data.
Advanced Spaceborn Thermal Emission and Reflection Radiometer (ASTER) reflectance
data have been processed and interpreted with the production of geological map,
lineament map and some hydrothermal alteration minerals abundance maps at a scale
of 1:125,000.
Statistically selected and enhanced 3-bands color composite image of raw ASTER data
and images resulted from principal component transformation (PCA) produced
substantial spectral contrast between different
lithology and enable to interpret the
lithological boundaries.
Spatial enhancement of ASTER data using convolution filters and digital elevation
model (DEM) extracted from the Shuttle Radar Topographic Mission (SRTM) have been
used for lineament manual extraction. Hill-shading techniques are applied to SRTM
DEMs to enhance terrain perspective views and to extract morphologically defined
structures. Foliations, folds, different set of fractures are major structural elements
recognized from the image processing and hill-shading techniques.
For regional mapping of some hydrothermal alteration minerals “Feature oriented
Principal Component Analysis (FPCA)” and band rationing and threshold image
processing methods were applied. For both methods application subset of the ASTER
bands were selected according to the position of characteristics spectral features of the
alteration minerals in the VNIR and SWIR portion of the spectrum.
Hydrothermal alteration in the study area mainly consist argillic-altered rocks and iron
oxide/hydroxide altered rocks and mapped across various lithologic units.
The overall result of this study demonstrates the usefulness of remote sensing method
and ASTER multi-spectral data for alteration, structure and lithologic mapping.
Advisors/Committee Members: Dr. Dagnachew Legesse (advisor).
Subjects/Keywords: spectral;
remote sensing;
SRTM;
PCA;
lithology;
lineament;
Kemashi;
hydrothermal;
geology;
Ethiopia;
digital elevation model;
band ratio;
ASTER;
alteration
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
ABERA, F. W. (2012). MAPPING HYDROTHERMALLY ALTERED ROCKS AND LINEAMENT ANALYSIS THROUGH DIGITAL ENHANCEMENT OF ASTER DATA CASE STUDY: KEMASHI AREA, WESTERN ETHIOPIA
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/821
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
ABERA, FANTAYE WELDEMARIAM. “MAPPING HYDROTHERMALLY ALTERED ROCKS AND LINEAMENT ANALYSIS THROUGH DIGITAL ENHANCEMENT OF ASTER DATA CASE STUDY: KEMASHI AREA, WESTERN ETHIOPIA
.” 2012. Thesis, Addis Ababa University. Accessed April 11, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/821.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
ABERA, FANTAYE WELDEMARIAM. “MAPPING HYDROTHERMALLY ALTERED ROCKS AND LINEAMENT ANALYSIS THROUGH DIGITAL ENHANCEMENT OF ASTER DATA CASE STUDY: KEMASHI AREA, WESTERN ETHIOPIA
.” 2012. Web. 11 Apr 2021.
Vancouver:
ABERA FW. MAPPING HYDROTHERMALLY ALTERED ROCKS AND LINEAMENT ANALYSIS THROUGH DIGITAL ENHANCEMENT OF ASTER DATA CASE STUDY: KEMASHI AREA, WESTERN ETHIOPIA
. [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2021 Apr 11].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/821.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
ABERA FW. MAPPING HYDROTHERMALLY ALTERED ROCKS AND LINEAMENT ANALYSIS THROUGH DIGITAL ENHANCEMENT OF ASTER DATA CASE STUDY: KEMASHI AREA, WESTERN ETHIOPIA
. [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/821
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
26.
Pulla, Sandeep.
Structure and Dynamics of a Tropical Dry Forest Plant Community.
Degree: PhD, Faculty of Science, 2018, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/4152
► This thesis is spurred by the overarching question “why is a plant where it is in space and time?”, which, when asked in different global…
(more)
▼ This thesis is spurred by the overarching question “why is a plant where it is in space and time?”, which, when asked in different global communities over the last century or so, has contributed to the development of general theories of plant community ecology and has provided information relevant to understanding, managing, and predicting the future of those communities. The question is asked in the context of a seasonally dry tropical forest (SDTF) plant community in southern India, based on long-term research conducted in a permanent 50-ha sampling plot. We employ a layered approach to answering this question, wherein we deconstruct the structure and dynamics of the plant community by first establishing the spatial structure of soils, topography and
lithology in the plot. Next we assess how this spatial structure, together with temporal variation in precipitation, affects plant abundances in space and time. Next we break up abundance variation into the components of recruitment, mortality and stem radial growth and assess how these respond to variation in environmental factors such as precipitation, temperature, soils, topography and fire, and biotic neighborhoods.
In Chapter 2, we examine the roles of
lithology, topography, vegetation and fire in generating local-scale (<1 km2) soil spatial variability in the 50-ha plot. For this, we mapped soil (available nutrients, Al, total C, pH, moisture and texture in the top 10cm), rock outcrops, topography, all native woody plants ≥1 cm diameter at breast height (DBH), and spatial variation in fire frequency (times burnt during the 17 years preceding soil sampling) in a permanent 50-ha plot. Unlike classic catenas, lower elevation soils had lesser moisture, plant-available Ca, Cu, Mn, Mg, Zn, B, clay and total C. The distribution of plant-available Ca, Cu, Mn and Mg appeared to largely be determined by the whole-rock chemical composition differences between amphibolites and hornblende-biotite gneisses. Amphibolites were associated with summit positions, while gneisses dominated lower elevations, an observation that concurs with other studies in the region which suggest that hillslope-scale topography has been shaped by differential weathering of lithologies. This “inverse catena” pattern is possibly reinforced by topography due to nutrient leaching and clay depletion in the drainage area. Neither NO3 – N nor NH4+-N was explained by the basal area of trees belonging to Fabaceae, a family associated with N-fixing species, and no long-term effects of fire on soil parameters were detected. A strong SW-NE trending P pattern remained unexplained by any of the factors considered. Local-scale lithological variation is an important first-order control over soil variability at the hillslope scale in this SDTF, by both direct influence on nutrient stocks and indirect influence via control of local relief.
The extent to which interspecific niche differences structure plant communities is highly debated, with extreme viewpoints ranging from fine-scaled niche partitioning,…
Advisors/Committee Members: Raman, Sukumar (advisor).
Subjects/Keywords: Soil; Topography; Lithology; Tropical dry-forest community; Research Subject Categories::FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Plant production::Forestry
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Pulla, S. (2018). Structure and Dynamics of a Tropical Dry Forest Plant Community. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/4152
Chicago Manual of Style (16th Edition):
Pulla, Sandeep. “Structure and Dynamics of a Tropical Dry Forest Plant Community.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed April 11, 2021.
http://etd.iisc.ac.in/handle/2005/4152.
MLA Handbook (7th Edition):
Pulla, Sandeep. “Structure and Dynamics of a Tropical Dry Forest Plant Community.” 2018. Web. 11 Apr 2021.
Vancouver:
Pulla S. Structure and Dynamics of a Tropical Dry Forest Plant Community. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Apr 11].
Available from: http://etd.iisc.ac.in/handle/2005/4152.
Council of Science Editors:
Pulla S. Structure and Dynamics of a Tropical Dry Forest Plant Community. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/4152
Universidade dos Açores
27.
Costa, Soraia Raquel Oliveira.
Avaliação de fluoretos na água de consumo do concelho da Praia da Vitória (Ilha Terceira, Açores) e suas consequências a nível da saúde pública.
Degree: 2014, Universidade dos Açores
URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.uac.pt:10400.3/3096
► Dissertação de Mestrado, Engenharia e Gestão de Sistemas de Água, 25 de Junho de 2014, Universidade dos Açores.
Em algumas freguesias do concelho da Praia…
(more)
▼ Dissertação de Mestrado, Engenharia e Gestão de Sistemas de Água, 25 de Junho de 2014, Universidade dos Açores.
Em algumas freguesias do concelho da Praia da Vitória, o teor de fluoretos na água de consumo ultrapassa o valor paramétrico de 1,5 mg/L, estabelecido pelo Decreto-lei 306/2007 de 27 de Agosto. Este valor é igualmente ultrapassado em quatro das nascentes (Frechas, Burra, Gaiteiro, Gaiteiro e Rolo dos Moinhos) que fornecem água para grande parte das zonas de abastecimento do concelho, incluindo essas mesmas freguesias. Foi feito um estudo da variação de fluoretos na água destas nascentes para um período de tempo de 5 anos (2008-2012), acompanhado pelo enquadramento geológico das mesmas e distribuição geográfica consoante o seu teor médio de fluoreto. A influência da precipitação foi avaliada pela comparação entre o teor de fluoreto na água e a precipitação observada, tendo também em conta um tempo de residência hidráulico dos aquíferos, onde se concluiu que o teor de fluoreto nas nascentes é influenciado por um tempo de residência hidráulico de dois a três meses, valor ligeiramente superior a um e dois meses, considerado típico para os Açores. Foram ainda avaliadas as consequências na saúde pública devido à ingestão de um teor de fluoretos acima do valor paramétrico de 1,5 mg/L, situação que se verifica nas freguesias da Agualva, Vila Nova e São Brás. Através de um rastreio de fluorose dentária, realizado na Escola Básica Integrada da Praia da Vitória, foram observadas 56 crianças com idades compreendidas entre os 9 e os 12 anos, pertencentes às referidas freguesias. Os resultados deste rastreio revelaram que 25% das crianças observadas apresentam índices de fluorose dentária e que em 25% das crianças a situação é questionável. Na amostra analisada foram observados todos os estágios da fluorose, desde o severo até ao muito suave, com predominância para este último. O índice médio de fluorose na freguesia da Agualva foi de 0,9, o mais elevado das três freguesias em estudo.
In some administrative areas of the municipality of Praia da Vitória, the fluoride content in drinking water exceeds its legal recommended value of 1,5 mg/L, established by the ordinance 306/2007 of the 27 of August. A study of the fluoride variation in these springs was conducted for a period of 5 years (2008-2012), accompanied by the geological location of the springs and their geographical distribution according to their average fluoride content. The precipitation influence was evaluated by comparing the fluoride content with the observed precipitation, also considering the hydraulic residence time of the aquifers, where it was concluded that the fluoride content in the springs in influenced by a hydraulic residence time of two to three months, which is slightly higher to one and two months, the typical hydraulic residence time considered in the Azores. It was also evaluated the public health consequences due to the ingestion of high fluoride content, above the legal recommended value of 1,5 mg/L, a situation that is verified in…
Advisors/Committee Members: Quadros, Sílvia Alexandra Bettencourt de Sousa, Rodrigues, Francisco Cota.
Subjects/Keywords: Fluoreto; Fluorose Dentária; Saúde Pública; Precipitação; Litologia; Ilha Terceira (Açores); Dental Fluorosis; Fluoride; Public Health; Lithology; Precipitation; Azores
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APA (6th Edition):
Costa, S. R. O. (2014). Avaliação de fluoretos na água de consumo do concelho da Praia da Vitória (Ilha Terceira, Açores) e suas consequências a nível da saúde pública. (Thesis). Universidade dos Açores. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.uac.pt:10400.3/3096
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Costa, Soraia Raquel Oliveira. “Avaliação de fluoretos na água de consumo do concelho da Praia da Vitória (Ilha Terceira, Açores) e suas consequências a nível da saúde pública.” 2014. Thesis, Universidade dos Açores. Accessed April 11, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:repositorio.uac.pt:10400.3/3096.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Costa, Soraia Raquel Oliveira. “Avaliação de fluoretos na água de consumo do concelho da Praia da Vitória (Ilha Terceira, Açores) e suas consequências a nível da saúde pública.” 2014. Web. 11 Apr 2021.
Vancouver:
Costa SRO. Avaliação de fluoretos na água de consumo do concelho da Praia da Vitória (Ilha Terceira, Açores) e suas consequências a nível da saúde pública. [Internet] [Thesis]. Universidade dos Açores; 2014. [cited 2021 Apr 11].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.uac.pt:10400.3/3096.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Costa SRO. Avaliação de fluoretos na água de consumo do concelho da Praia da Vitória (Ilha Terceira, Açores) e suas consequências a nível da saúde pública. [Thesis]. Universidade dos Açores; 2014. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.uac.pt:10400.3/3096
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cambridge
28.
Matthews, Simon William.
Deep Earth volatile cycles as revealed by basalt chemistry.
Degree: PhD, 2019, University of Cambridge
URL: https://doi.org/10.17863/CAM.40015
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774817
► Earth's volatiles (e.g. CO₂ and H₂O) are thought to be stored largely in the interior of the planet. The partitioning of these volatile elements between…
(more)
▼ Earth's volatiles (e.g. CO₂ and H₂O) are thought to be stored largely in the interior of the planet. The partitioning of these volatile elements between Earth's surface and interior controls the evolution of our atmosphere and oceans, acting as a regulator on our planet's long term climate. Basalt geochemistry is our most direct probe of Earth's convecting mantle, however the tendency of volatile elements to form vapour phases deep within volcanic systems obscures the mantle volatile signals inherited by basalts. This thesis explores the extent to which basalts may preserve mantle volatile signals, places new constraints on volatile heterogeneity within the Icelandic plume, and considers the role of mantle convection in establishing deep Earth volatile cycles. Volatile- trace element systematics in suites of basaltic glass and melt inclusions have been widely used to infer volatile abundances in the depleted mantle, but have resulted in a large diversity of estimates. In this thesis a new statistical treatment of such datasets is developed, using simple numerical models for concurrent magma mixing and degassing. It is demonstrated that the role of magma degassing was previously underestimated, and the variability in apparent mantle volatile concentrations is largely a result of variability in magma mixing and degassing. Using a large new dataset of Icelandic melt inclusions sampling diverse mantle components, alongside a compilation of existing suites, the gross structure of the global melt inclusion array is shown to be controlled by magma degassing and olivine decrepitation. By applying the new statistical treatment of the data developed here, the presence of at least three mantle components with distinct volatile chemistry are demonstrated to contribute Icelandic magmas. With a novel combination of geophysical and geochemical constraints, the thermal structure and mineralogy of the melting region beneath Iceland is constrained. The role of mineralogical heterogeneity in the long term storage of mantle volatiles is critically assessed.
Subjects/Keywords: mantle; mantle volatiles; basalt; geochemistry; Deep Earth; carbon; water; mantle temperature; mantle lithology; olivine; melt inclusions; degassing; mixing; Iceland; mantle plume
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
Matthews, S. W. (2019). Deep Earth volatile cycles as revealed by basalt chemistry. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.40015 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774817
Chicago Manual of Style (16th Edition):
Matthews, Simon William. “Deep Earth volatile cycles as revealed by basalt chemistry.” 2019. Doctoral Dissertation, University of Cambridge. Accessed April 11, 2021.
https://doi.org/10.17863/CAM.40015 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774817.
MLA Handbook (7th Edition):
Matthews, Simon William. “Deep Earth volatile cycles as revealed by basalt chemistry.” 2019. Web. 11 Apr 2021.
Vancouver:
Matthews SW. Deep Earth volatile cycles as revealed by basalt chemistry. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Apr 11].
Available from: https://doi.org/10.17863/CAM.40015 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774817.
Council of Science Editors:
Matthews SW. Deep Earth volatile cycles as revealed by basalt chemistry. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.40015 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774817
University of Cambridge
29.
Matthews, Simon William.
Deep Earth volatile cycles as revealed by basalt chemistry.
Degree: PhD, 2019, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/292863
► Earth’s volatiles (e.g. CO2 and H2O) are thought to be stored largely in the interior of the planet. The partitioning of these volatile elements between…
(more)
▼ Earth’s volatiles (e.g. CO2 and H2O) are thought to be stored largely in the interior of the planet. The partitioning of these volatile elements between Earth’s surface and interior controls the evolution of our atmosphere and oceans, acting as a regulator on our planet’s long term climate. Basalt geochemistry is our most direct probe of Earth’s convecting mantle, however the tendency of volatile elements to form vapour phases deep within volcanic systems obscures the mantle volatile signals inherited by basalts. This thesis explores the extent to which basalts may preserve mantle volatile signals, places new constraints on volatile heterogeneity within the Icelandic plume, and considers the role of mantle convection in establishing deep Earth volatile cycles.
Volatile- trace element systematics in suites of basaltic glass and melt inclusions have been widely used to infer volatile abundances in the depleted mantle, but have resulted in a large diversity of estimates. In this thesis a new statistical treatment of such datasets is developed, using simple numerical models for concurrent magma mixing and degassing. It is demonstrated that the role of magma degassing was previously underestimated, and the variability in apparent mantle volatile concentrations is largely a result of variability in magma mixing and degassing.
Using a large new dataset of Icelandic melt inclusions sampling diverse mantle components, alongside a compilation of existing suites, the gross structure of the global melt inclusion array is shown to be controlled by magma degassing and olivine decrepitation. By applying the new statistical treatment of the data developed here, the presence of at least three mantle components with distinct volatile chemistry are demonstrated to contribute Icelandic magmas. With a novel combination of geophysical and geochemical constraints, the thermal structure and mineralogy of the melting region beneath Iceland is constrained. The role of mineralogical heterogeneity in the long term storage of mantle volatiles is critically assessed.
Subjects/Keywords: mantle; mantle volatiles; basalt; geochemistry; Deep Earth; carbon; water; mantle temperature; mantle lithology; olivine; melt inclusions; degassing; mixing; Iceland; mantle plume
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Matthews, S. W. (2019). Deep Earth volatile cycles as revealed by basalt chemistry. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/292863
Chicago Manual of Style (16th Edition):
Matthews, Simon William. “Deep Earth volatile cycles as revealed by basalt chemistry.” 2019. Doctoral Dissertation, University of Cambridge. Accessed April 11, 2021.
https://www.repository.cam.ac.uk/handle/1810/292863.
MLA Handbook (7th Edition):
Matthews, Simon William. “Deep Earth volatile cycles as revealed by basalt chemistry.” 2019. Web. 11 Apr 2021.
Vancouver:
Matthews SW. Deep Earth volatile cycles as revealed by basalt chemistry. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Apr 11].
Available from: https://www.repository.cam.ac.uk/handle/1810/292863.
Council of Science Editors:
Matthews SW. Deep Earth volatile cycles as revealed by basalt chemistry. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/292863
Colorado School of Mines
30.
Herzog, Matthew T.
Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation.
Degree: MS(M.S.), Petroleum Engineering, 2014, Colorado School of Mines
URL: http://hdl.handle.net/11124/17030
► Accurately predicting pore pressure in unconventional plays is an important aspect in executing sound, safe, and economical, drilling practices. Disequilibrium compaction, where fluid pressure increases…
(more)
▼ Accurately predicting pore pressure in unconventional plays is an important aspect in executing sound, safe, and economical, drilling practices. Disequilibrium compaction, where fluid pressure increases due to compaction (loading), cannot fully explain overpressure conditions present in many unconventional plays. Secondary pressure mechanisms such as hydrocarbon maturation and variations in burial history will cause velocity response to follow unloading paths, not solely loading. To capture the excess pressure generated, pore pressure can be estimated from wireline sonic logs using a modified Bowers approach. This method uses an effective stress approach, where compressional velocity data is related to effective stress (overburden minus pore pressure) using a modified Bowers set of equations. In an effort to further reduce model mismatch, Bowers' original equations are modified to include porosity and
lithology effects on velocity. To do so, logs from well within the LJE block in the Neuquén Basin are depth shifted to a reference well. Depth shifting shows a remarkable lack of variation in log signatures between wells, regardless of tool vintage, implying these wells possess similar stress states, mineral constituents, and porosities. This finding allows for a compressional velocity log correction back to a constant
lithology and porosity, variation from which is attributed to effective stress. The effective stress component, and its relation to pore pressure, is the basis for which the modified Bowers pore pressure prediction methodology can be applied. Accurate pore pressure prediction is integral in mitigating recognized drilling challenges in unconventional reservoirs, such as maintaining drilling crew safety and wellbore instability, as well as selecting proper cement weights and casing grades. This paper will expand on the work Bowers completed in the Gulf of Mexico, adopting the methodology for use in the Vaca Muerta formation, as well as provide insight into the observable relationships between
lithology, porosity, and acoustic log response.
Advisors/Committee Members: Bratton, Tom (advisor), Eustes, Alfred William (advisor), Sonnenberg, Stephen A. (committee member), Tutuncu, Azra (committee member).
Subjects/Keywords: Vaca Muerta; pore pressure; modified bowers; lithology substitution; Bowers; acoustic log; Formations (Geology) – Argentina; Pressure; Petrology; Porosity; Shale oils; Shale gas
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Herzog, M. T. (2014). Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/17030
Chicago Manual of Style (16th Edition):
Herzog, Matthew T. “Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation.” 2014. Masters Thesis, Colorado School of Mines. Accessed April 11, 2021.
http://hdl.handle.net/11124/17030.
MLA Handbook (7th Edition):
Herzog, Matthew T. “Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation.” 2014. Web. 11 Apr 2021.
Vancouver:
Herzog MT. Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation. [Internet] [Masters thesis]. Colorado School of Mines; 2014. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/11124/17030.
Council of Science Editors:
Herzog MT. Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation. [Masters Thesis]. Colorado School of Mines; 2014. Available from: http://hdl.handle.net/11124/17030
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Open Access Theses and Dissertations
