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Mine detail: Porphyry Dike Mine
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North America
United States
Montana
Lewis and Clark
Previously called ''
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Location
Lat / long:
46.42768, -112.28839
Resource(M)
Primary:
Gold
Tertiary:
Arsenic
Ore:
Gold
Gangue:
Limonite, Pyrite
Orebody form:
IRREGULAR
Discovery year:
1890
Production
Operation type:
Unknown
Production size:
Small
Development status:
Past Producer
First production started:
1892
Geology
Host type:
Rhyolite
Structure:
Large Scale Volcanic And Igneous Intrusive Activities Boulder Batholith, Jointing, Overlapping Of Pyroclastics And Flow Units Thin Dikes And Faults
Alteration processes:
Sericitization, Kaolinization
References
MRDS
W026542
DEP
10078284
Reference
{Deposit:: USGS BULL 842, P. 259-60.}{Deposit:: USGS BULL 1151, P. 114-16, PL. 1.}{Deposit:: USGS BULL 527, P. 84-85.}{Production:: RUPPEL, E. T., 1963 , GEOL. OF THE BASIN QUAD., JEFF., LEWIS & CLARK, POWELL CO., MONT USGS BULL NO 1151}
Reporter
Mc Kenzie, Craig L.; R. B. Berg, Wise, Kristine K. (Elliott, James E.)