Montana · Lewis and Clark County
Past Producer

Armstrong Mine

Lewis and Clark County, Montana, United States
SilverLeadGoldZincCopperUranium
⌖ Show on mapUSGS source ↗
Commodities
PrimarySilver, Lead
SecondaryGold, Zinc, Copper
TertiaryUranium
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Ore controlFault Zone In Quartz Monzonite
Materials
Ore mineralsChalcopyrite, Galena, Gold, Sphalerite
GanguePyrite, Quartz, Tourmaline
Geology
Host rockQuartz Monzonite
Associated rockQuartz Monzonite · Butte Quartz Monzonite (Boulder Batholith)
StructureBoulder Batholith, Fault Zone Trending East, Dip 80n
Economic & production
Development statusPast Producer
Identification
Deposit ID10101933
MRDS IDDB02148
RegionNA
Data scoreB
Coordinates46.48073, -112.2845
References
USGS BULL 1151, P. 98, PL. 1.US B. OF MINES, 1943, REPT. TO SEC. OF INT.USGS BULL 842, P. 248.USGS BULL 1151, P. 97; USBM REPT. TO SEC. INT.