Database name: |
World Sediment-Hosted Cu Deposits |
Compilers: |
R. V. Kirkham, J. J. Carriere, A. Rafer, and P. Born |
Release date: |
2015-01-27 |
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Deposit name(s): |
Rogers Pass |
Political location(s): |
United States; Province or state: Montana; Nearest community: Helena (55 km NW) |
Deposit clan (type): |
sediment-hosted copper |
Deposit (sub) types: |
undifferentiated |
Deposit status: |
occurrence; Status comments: stratabound Cu-Ag mineralization in Spokane quartzite is spotty and low-grade and exhibits simple mineralogy |
Geologic province: |
Cordillera |
Commodities: |
Cu; Ag |
Mineralization styles: |
stratabound |
Geological ages: |
Middle Proterozoic (host rocks) |
Host rocks: |
(1) sedimentary; mudstone-sandstone-siltstoneHost rock stratigraphy: | Spokane Formation |
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Mineralogy: |
(mineralization): malachite, chalcocite, bornite, covellite |
References: |
Connor, J.J; McNeal, J.M., 1988 |
Geochemistry of mineralized quartzite beds in Spokane Formation (Belt Supergroup), Rogers Pass area, Lewi and Clark County, Montana |
United States Geological Survey, Bulletin - 17 |
Connor, J.J., 1980 |
Geochemistry of a copper-silver-bearing sandstone in the Spokane Formation (Belt Supergroup), Rogers Pass area, western Montana |
Abstracts with Programs - Geological Society of America, Volume 12 - 270 |
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