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Gases in Hydrous Alteration Minerals: An Exploration Tool for Ore Deposits.

Norman DI
For Reference Only At Bureau Libraries :118 pages
The possibility of gases trapped in hydrous minerals and fluid inclusions as geochemical guides to sulfide ore deposits was studied. Techniques for analyzing structurally bound gases in hydrous minerals were developed. A survey of phyllosilicate minerals indicated that those associated with ore deposits had up to 10 times the amount of co2 and h2s as similar minerals from nonore locals. Analyses of gases in altered, phyllosilicate-bearing rock samples from the Bingham, Utah, and Copper Flat, New Mexico, porphyry copper deposits indicated that the gas consumptions are related to the specific types of alteration and mineralization. Samples were collected from the surface of the copper flat deposit before it was disturbed by mining. Gases in phyllosilicates outlined the deposit that did not crop out. Samples were collected on the exposed portions of the St. Cloud-U.S. Treasury vein that crops out for about 1.5 Km. There are no trace element anomalies either in the vein or wall rock over the silver-rich ore shoots that are in production. Both co2 content of inclusion gases as well as n2-co2 ratios indicated the location of ore shoots.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
Identifying No.
OFR 69-84
NIOSH Division
Source Name
For Reference Only At Bureau Libraries
Performing Organization
New Mexico Inst. Min.&tech.
Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division