Montana · Lewis and Clark County
Past Producer

Spring Hill Mine

Lewis and Clark County, Montana, United States
GoldSilverLeadCopperArsenic
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
SecondarySilver, Lead, Copper
TertiaryArsenic
Commodity typeM
Deposit
Deposit typeContact Metasomatic
Deposit sizeS
WorkingsSurface/Underground
Ore controlOn Or Near Contact Between Diorite And Limestone
Materials
Ore mineralsChalcopyrite, Galena, Gold, Pyrrhotite
GangueAnkerite, Calcite, Chlorite, Garnet, Pyrite, Pyroxene, Quartz
Geology
Host rockDiorite,Limestone · Madison Group
Associated rockDiorite · Boulder Batholith
AlterationSericitation, Silicification, Chloritifaction, Carbonatization, Hydrothermal
Economic & production
Development statusPast Producer
Discovery year1870
Identification
Deposit ID10098026
MRDS IDDB02096
RegionNA
Data scoreB
Coordinates46.5549, -112.09671
References
USGS BULL 527, P. 101.USGS BULL 842, P. 207-09.ECCONOMIC GEOLOGY VOL 24, NO 6, P. 544