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Title	Hydrothermal alteration at the United States Mine, West Mountain (Bingham) District, Utah
Publication Type	thesis
School or College	College of Mines & Earth Sciences
Department	Mineralogy
Author	Stephens, James D.
Date	1960
Description	A study was made of the hydrothermal alteration associated with ore deposits of four mining districts. In each case the ore minerals occur as bedding replacements of limestone host rocks Samples were collected along the strike of the formations, beginning in sulfide mineralization and proceeding to apparently unaltered rocks The samples were studied by x-ray diffraction analysis, differential thermal analysis9 spectrographic analysis, chemical analysis, and hydrothermal experimentation In only one case, at the United states mine, west Mountain (Bingham) district, 'Utah, was a correlation between alteration and sulfide mineralization established. Immediately apparent in samples from this locality was a progressive change in color of the alteration products. Samples taken in and near ore were dark green (nearly black,), while those at a distance of approximately forty feet from ore were nearly white. Talc is found in and adjacent to ore. Adjacent to the talc and out from ore, phlogopite and K-feldspar are found. Beyond the phlogopite-K-feldspar zone, only montmorillonite is found. The montmorillonite, however, is zoned compositionally with an iron-aluminum variety nearest the sulfides􁪽 a magnesium=aluminum variety in an intermediate position, and a high aluminum variety at the point most distant from sulfides examined. Analyses of ten samples taken at five foot intervals showed a distinct enrichment in Fe203􁪽 FsOp A1203, and K20 near the sulfides􁪽 and a less definite enrichment of Na20 away from them Spectrographic analysis or selected samples showed that trace amounts of molybdenum» copper, and silver increase as ore is approached, and trace amounts of zirconium increase away from ore.
Type	Text
Publisher	University of Utah
Dissertation Name	Doctor of Philosophy
Language	eng
Rights Management	© James D. Stephens
Format	application/pdf
Format Medium	application/pdf
ARK	ark:/87278/s6vs0f6g
Setname	ir_etd
ID	2253112
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6vs0f6g

Page Metadata

Title	Page 7
Format	application/pdf
Setname	ir_etd
ID	2253119
OCR Text	Show 1 ABSTRACT A study associated with In each ments case the Samples to In occur collected along the were unaltered rocko apparently only one at case, the (Bingham) district, 'Utah, progressive change in color Samples taken in while and those from ore Talo is found talc and were out near at were differential chemical analy was a mine, west correlation a ore of from this the were locality alteration products. dark green distance of was (nearly approximately forty nearly white. in and from ore, adjacent to oreo Adjacent hlogopite and'K-feldspar to are Beyond the phlogopite-K-feldspar zone, only mont morillonite is foundo zoned the sulfide mineralization established. samples foundo' of samples United states in the The analysis, Immediately apparent feet strike in sulfide mineralization and pro between alteration and black,), bedding replaoe as hydrothermal experimentationo' Mountain a mining districtso four analysis9 spectrographic analysis, and sis, of rockso host studied by x-ray diffraction thermal hydrothermal alteration minerals ore formations, beginning oeeding the deposits ore limestone of of made was oompositionally The with montmorillonite, however, an iron-aluminum variety is nearest
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6vs0f6g/2253119