Alaska
Occurrence
Sumdum Prospect
Alaska, United States
Copper
Zinc
Silver
Lead
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USGS source ↗
Description
Alaska Helicopter Syndicate
Commodities
Primary
Copper, Zinc
Secondary
Silver, Lead
Commodity type
M
Deposit
Deposit size
N
Orebody form
TABULAR, LENTICULAR
Ore control
Along Or Near Faults Or Folds
Materials
Ore minerals
Bornite, Chalcocite, Chalcopyrite, Galena, Malachite, Sphalerite
Gangue
Albite, Barite, Calcite, Pyrite, Pyrrhotite, Quartz
Geology
Host rock
Gneiss
Associated rock
Diorite
Structure
Regional Nw-Trending Foliation, Isoclinal Folds Overturned To Sw, Numerous Minor Folds On Limbs Of Larger Folds
Alteration
Secondary Iron Minerals
Economic & production
Development status
Occurrence
Discovery year
1958
Identification
Deposit ID
10000484
MRDS ID
A010667
Region
NA
Data score
B
Coordinates
57.77753, -133.44362
References
USGS B 1108-E, P. E1-E31USGS OFR 78-698, P. 28-29USGS OFR 77-649, P. 4, 128-129, 205-212, 258-259