Alaska
Past Producer
Hirst-Chichagof Mine
Alaska, United States
Gold
Silver
Lead
Zinc
Copper
Arsenic
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USGS source ↗
Commodities
Primary
Gold, Silver
Secondary
Lead
Tertiary
Zinc, Copper, Arsenic
Commodity type
M
Deposit
Deposit type
Vein
Deposit size
S
Workings
Underground
Orebody form
TABULAR
Ore control
Intersections Of Main Fault & Bedding And Also Warp In Main Fault
Materials
Ore minerals
Chalcopyrite, Galena, Gold, Sphalerite
Gangue
Calcite, Quartz
Geology
Host rock
Siltstone · Sitka Graywacke;Sitka Graywacke
Associated rock
Mafic Intrusive Rock
Structure
Hirst Fault Localizes Ore Shoots
Alteration
Porphyry Dike Alogn Footwall Is Altered
Economic & production
Development status
Past Producer
First production
1922
Last production
1943
Discovery year
1905
Identification
Deposit ID
10100942
MRDS ID
A010687
Alternate names
Hirst, Bahrt
Region
NA
Data score
B
Coordinates
57.68582, -136.11036
References
USGS OFR 78-450, P. 58-61USGS B 929, P. 78-81, 101-118USGS B929