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You searched for +publisher:"McGill University" +contributor:("Martin, R. F."). Showing records 1 – 3 of 3 total matches.

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McGill University

1. Mungall, James E. Compositional effects of magma mixing and diffusive mass transport on a basalt-pantellerite suite, Terceira, Azores.

Degree: PhD, Department of Earth and Planetary Sciences., 1993, McGill University

Peralkaline trachytic magma erupted on Terceira, in the Azores are derived from associated basalts by extreme fractional crystallization of an assemblage including amphibole. The eruption of 1761 produced both trachytic and hybrid basaltic lavas and exemplifies magma mixing processes that occurred frequently in the past. Mingling of basaltic magmas produces homogeneous hybrid magmas; mingling between basaltic and trachytic liquids is inhibited by thermal quench of the basaltic magma. Hybridization of benmoreitic magma into basalt may account for its rarity in oceanic island lava suites.

Convection observed in an experimental basalt-pantellerite melt system is not attributable to gravitational instability at the nominally horizontal multicomponent free-diffusion boundary. Stresses due to diffusion in the viscoelastic silicate melts produced a meniscus; inclined density gradients at the meniscus cause convection.

Glassy pumice samples have been leached at ambient conditions, and have lost over 25% of F, Na, K, Si, Fe, Ti and Mn originally present; U, Al, Nb, Ca, Y, Rb and REE show smaller but significant losses.

Advisors/Committee Members: Martin, R. F. (advisor).

Subjects/Keywords: Geochemistry.

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APA (6th Edition):

Mungall, J. E. (1993). Compositional effects of magma mixing and diffusive mass transport on a basalt-pantellerite suite, Terceira, Azores. (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile41732.pdf

Chicago Manual of Style (16th Edition):

Mungall, James E. “Compositional effects of magma mixing and diffusive mass transport on a basalt-pantellerite suite, Terceira, Azores.” 1993. Doctoral Dissertation, McGill University. Accessed June 16, 2019. http://digitool.library.mcgill.ca/thesisfile41732.pdf.

MLA Handbook (7th Edition):

Mungall, James E. “Compositional effects of magma mixing and diffusive mass transport on a basalt-pantellerite suite, Terceira, Azores.” 1993. Web. 16 Jun 2019.

Vancouver:

Mungall JE. Compositional effects of magma mixing and diffusive mass transport on a basalt-pantellerite suite, Terceira, Azores. [Internet] [Doctoral dissertation]. McGill University; 1993. [cited 2019 Jun 16]. Available from: http://digitool.library.mcgill.ca/thesisfile41732.pdf.

Council of Science Editors:

Mungall JE. Compositional effects of magma mixing and diffusive mass transport on a basalt-pantellerite suite, Terceira, Azores. [Doctoral Dissertation]. McGill University; 1993. Available from: http://digitool.library.mcgill.ca/thesisfile41732.pdf


McGill University

2. Roelofsen, Jeanette N. The primary and secondary mafic silicates of two alkaline anorogenic complexes : Strange Lake (Quebec-Labrador) and Amba Dongar (Gujarat, India).

Degree: PhD, Department of Earth and Planetary Sciences., 1997, McGill University

The primary and secondary mafic silicates from the Amba Dongar carbonatitic-alkaline complex, Gujarat, India and the Strange Lake peralkaline granitic complex, Quebec-Labrador, Canada are the subject of this investigation of their origin, evolution and relationship to mineralization. Primary minerals are transformed by a variety of processes related to their crystallization history. The most important of these processes are: magma evolution, magma degassing and metasomatism. These processes are commonly associated with the evolution of peralkaline granitic and carbonatitic-alkaline complexes, and with the formation of associated mineral deposits (e.g., fluorite in the Amba Dongar complex; Zr-, REE- (rare-earth elements), Be-, Nb-and Y-rich deposit in the Strange Lake complex). Although all minerals in these complexes may be subject to these changes, the mafic silicates amphibole, pyroxene and mica are of particular interest, as they remain poorly studied and may comprise up to 10 vol.% of the rock. Moreover, they can contain significant quantities of high field-strength elements (HFSE), which may be mobilized following interaction with later fluids, and deposited as secondary minerals in the ore zone.

In the Amba Dongar complex, Na-metasomatism followed by K- (or Mg-) metasomatism resulted in the formation of fenites, with mobilization of HFSE, among other trace elements. Vermiculite was formed by a subsequent stage of hydrothermal alteration, which is also responsible for formation of the fluorite deposit. In the Strange Lake complex, enrichment of the primary arfvedsonitic amphibole in HFSE and REE is related to magmatic evolution, whereas later degassing released sufficient amounts of volatiles and Na that the amphibole became more potassic and aegirine crystallized. This amphibole acted as a sink for trace elements such as Li, HFSE and REE. These elements were remobilized during Na-metasomatism through replacement of amphibole by aegirine, and deposited as secondary, generally Ca-rich, minerals (e.g., winchitic amphibole and biopyriboles) during later, lower-temperature Ca-metasomatism. Primary mafic silicates in alkaline complexes can thus undergo metasomatic reactions that result in the mobilization of elements that contribute to formation of related ore deposits. These findings concerning the solid phases involved in both localities correlate very well with indications of mixing of two distinct fluid phases.

Advisors/Committee Members: Martin, R. F. (advisor).

Subjects/Keywords: Mineralogy.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Roelofsen, J. N. (1997). The primary and secondary mafic silicates of two alkaline anorogenic complexes : Strange Lake (Quebec-Labrador) and Amba Dongar (Gujarat, India). (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile34440.pdf

Chicago Manual of Style (16th Edition):

Roelofsen, Jeanette N. “The primary and secondary mafic silicates of two alkaline anorogenic complexes : Strange Lake (Quebec-Labrador) and Amba Dongar (Gujarat, India).” 1997. Doctoral Dissertation, McGill University. Accessed June 16, 2019. http://digitool.library.mcgill.ca/thesisfile34440.pdf.

MLA Handbook (7th Edition):

Roelofsen, Jeanette N. “The primary and secondary mafic silicates of two alkaline anorogenic complexes : Strange Lake (Quebec-Labrador) and Amba Dongar (Gujarat, India).” 1997. Web. 16 Jun 2019.

Vancouver:

Roelofsen JN. The primary and secondary mafic silicates of two alkaline anorogenic complexes : Strange Lake (Quebec-Labrador) and Amba Dongar (Gujarat, India). [Internet] [Doctoral dissertation]. McGill University; 1997. [cited 2019 Jun 16]. Available from: http://digitool.library.mcgill.ca/thesisfile34440.pdf.

Council of Science Editors:

Roelofsen JN. The primary and secondary mafic silicates of two alkaline anorogenic complexes : Strange Lake (Quebec-Labrador) and Amba Dongar (Gujarat, India). [Doctoral Dissertation]. McGill University; 1997. Available from: http://digitool.library.mcgill.ca/thesisfile34440.pdf


McGill University

3. Andrews, Oluf E.G. Apatite in the Kensington and Sainte-Véronique plutons, near Mont- Laurier, Québec : an indicator of magmatic and hydrothermal processes.

Degree: MS, Department of Earth and Planetary Sciences., 1996, McGill University

Apatite is an early crystallizing phase in Proterozoic potassic alkaline and shoshonitic magmas, and is used here to model and further the understanding of the source regions, and magmatic and hydrothermal processes of 1.08 Ga potassic plutons in the southwestern Grenville Province, Mont-Laurier area, Quebec. Apatite chemistry and sp{87}Sr/ sp{86}Sr ratios were documented in the shoshonitic and potassic alkaline intrusive facies of the Kensington pluton, and in the potassic alkaline series of the Sainte-Veronique pluton; the two plutons are separated by 70 km. Potassic magmas in the belt were derived from separate, although similar mantle regions, while the shoshonitic series may have been derived from a distinct region, or modified by contamination. Assimilation is consistent with zoning patterns in apatite from the Kensington shoshonitic syenite. Inclusion mineralogy at Sainte-Veronique is evidence of saturation of an immiscible sulfide liquid, which may be an intrinsic characteristic of potassic alkaline magmas in the Grenville Province. Advisors/Committee Members: Martin, R. F. (advisor).

Subjects/Keywords: Geology.; Mineralogy.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Andrews, O. E. G. (1996). Apatite in the Kensington and Sainte-Véronique plutons, near Mont- Laurier, Québec : an indicator of magmatic and hydrothermal processes. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile27271.pdf

Chicago Manual of Style (16th Edition):

Andrews, Oluf E G. “Apatite in the Kensington and Sainte-Véronique plutons, near Mont- Laurier, Québec : an indicator of magmatic and hydrothermal processes.” 1996. Masters Thesis, McGill University. Accessed June 16, 2019. http://digitool.library.mcgill.ca/thesisfile27271.pdf.

MLA Handbook (7th Edition):

Andrews, Oluf E G. “Apatite in the Kensington and Sainte-Véronique plutons, near Mont- Laurier, Québec : an indicator of magmatic and hydrothermal processes.” 1996. Web. 16 Jun 2019.

Vancouver:

Andrews OEG. Apatite in the Kensington and Sainte-Véronique plutons, near Mont- Laurier, Québec : an indicator of magmatic and hydrothermal processes. [Internet] [Masters thesis]. McGill University; 1996. [cited 2019 Jun 16]. Available from: http://digitool.library.mcgill.ca/thesisfile27271.pdf.

Council of Science Editors:

Andrews OEG. Apatite in the Kensington and Sainte-Véronique plutons, near Mont- Laurier, Québec : an indicator of magmatic and hydrothermal processes. [Masters Thesis]. McGill University; 1996. Available from: http://digitool.library.mcgill.ca/thesisfile27271.pdf

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