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Colorado School of Mines

1. Foiles, Lauren C. R-mode factor analysis of stream sediment data in the Fairbanks mining district, east-central Alaska.

Degree: MS(M.S.), Geology and Geological Engineering, 2018, Colorado School of Mines

The Fairbanks Mining District is located within east-central Alaska and is highly prospective for gold mineralization. Previously identified gold-bearing quartz veins are broadly classified as orogenic style gold mineralization and these are the source for the prolific placer gold resources that has been actively worked in the Fairbanks district since the late 1800s. The only major mineral deposit (>2 Moz) in the district that is actively being mined is the Fort Knox gold deposit (>8 Moz). Fort Knox is classified as a reduced intrusion-related gold deposit, and this style of mineralization is minor in the district compared to orogenic style mineralization. Exploration for both styles of mineralization was carried out using a stream sediment geochemical dataset collected in the district in 1982 and reanalyzed in 1995. The first ever multivariate statistical analysis of this geochemical survey is presented here. R-mode factor analysis with varimax rotation was performed on log transformed multi-element stream sediment data. This resulted in one factor related to gold mineralization with an As-Sb-Au geochemical association. This factor is strongly associated with orogenic gold veins but is not associated with reduced intrusion-related mineralization, like Fort Knox. High positive scoring samples for this factor are used to define prospective areas for orogenic style gold mineralization. Potential host rocks for reduced intrusion-related mineralization were identified and those areas that have anomalous concentrations of gold are used to define prospective areas for this mineralization style. Advisors/Committee Members: Holley, Elizabeth A. (advisor), Goldfarb, R. J. (committee member), Zhou, Wei (committee member).

Subjects/Keywords: Fairbanks; Orogenic gold deposits; Factor analysis; Reduced intrusion-related gold deposits; Geochemistry

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

APA (6th Edition):

Foiles, L. C. (2018). R-mode factor analysis of stream sediment data in the Fairbanks mining district, east-central Alaska. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172166

Chicago Manual of Style (16th Edition):

Foiles, Lauren C. “R-mode factor analysis of stream sediment data in the Fairbanks mining district, east-central Alaska.” 2018. Masters Thesis, Colorado School of Mines. Accessed September 24, 2018. http://hdl.handle.net/11124/172166.

MLA Handbook (7th Edition):

Foiles, Lauren C. “R-mode factor analysis of stream sediment data in the Fairbanks mining district, east-central Alaska.” 2018. Web. 24 Sep 2018.

Vancouver:

Foiles LC. R-mode factor analysis of stream sediment data in the Fairbanks mining district, east-central Alaska. [Internet] [Masters thesis]. Colorado School of Mines; 2018. [cited 2018 Sep 24]. Available from: http://hdl.handle.net/11124/172166.

Council of Science Editors:

Foiles LC. R-mode factor analysis of stream sediment data in the Fairbanks mining district, east-central Alaska. [Masters Thesis]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172166

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