Montana · Granite County
Occurrence
O'Brien Mine
Granite County, Montana, United States
Silver
Gold
Lead
Chromium
Antimony
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USGS source ↗
Description
Tim O'Brien
Commodities
Primary
Silver, Gold
Secondary
Lead
Tertiary
Chromium, Antimony
Commodity type
M
Deposit
Deposit size
N
Workings
Surface/Underground
Materials
Ore minerals
Chalcopyrite
Gangue
Pyrite, Quartz
Geology
Host rock
Metasedimentary Rock · Belt Group
Associated rock
Granite · Idaho Batholith
Economic & production
Development status
Occurrence
Discovery year
1925
Identification
Deposit ID
10013232
MRDS ID
D009419
Alternate names
Hidden Lead
Region
NA
Data score
C
Coordinates
46.00461, -113.66064
References
FS FIELD REPORT