The Sophie Gulch Mine is a tungsten mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Sophie Gulch Mine MRDS details
Site Name
Primary: Sophie Gulch Mine
Commodity
Primary: Tungsten
Tertiary: Gold
Tertiary: Lead
Location
State: Alaska
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1916
Year Last Production: 1917
Discovery Year: 1900
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Scheelite
Ore: Galena
Ore: Gold
Gangue: Pyrite
Gangue: Quartz
Gangue: Calcite
Gangue: Feldspar
Comments
Comment (Deposit): ZONE OF RESIDUAL MATERIAL 3-15 FT THICK WAS DEVELOPED OVER SHEAR ZONE CONTAINING NUMEROUS IRREGULAR QUARTZ, QUARTZ-FELDSPAR, AND QUARTZ-CALCITE VEINS FROM LESS THAN 1 IN TO ABOUT 1 FT THICK; SCHEELITE-BEARING ZONE 50 FT BY 1000 FT; SCHEELITE AT VEIN MARGINS AND DISSEMINATED IN WALL ROCK; SURROUNDED BY PERIPHERAL ZONE OF AU DISSEMIANTED IN WALL ROCK; SCHEELITE-BEARING VEINS CROSS CUT BY ARSENOPYRITE-PYRITE-GALENA STRINGERS; SOME ARSENOPYRITE ALSO DISSEMIANTED IN WALL ROCK.
Comment (Workings): DEVELOPED BY 65 FT TUNNEL, 32 FT SHAFT, 28 FT SHAFT AND OPEN CUTS PRIOR TO 1916; 3 BULLDOZER CUTS IN 1942-43 SHOWED VERY LITTLE RESIDUAL MATERIAL LEFT BEHIND BY HYDRAULIC OPERATION.
Comment (Geology): STRUCTURAL DATA: CLEAVAGE IN SCHIST STRIKES N WITH 23 DEGREES EAST DIP; VERTICAL JOINTS STRIKE N 35 DEGREES W; MINERALIZED FRACTURES STRIKE N 45 DEGREES E WITH VERTICAL TO STEEP NW DIPS; MINERALIZATION IS OFFSET BY GOUGE-FILLED FAULTS THAT STRIKE N 18 DEGREES W AND DIP 54 DEGREES E.
Comment (Deposit): UNWEATHERED MATERIAL TOO LOW GRADE TO MINE, USGS, OFR 17, P. 3; LATER REPORTS OF SPHALERITE AND STIBNITE AT THIS PROSPECT APPEAR TO BE IN ERROR. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Comment (Location): USGS MF-247, LOC. 17. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).
Comment (Production): 4000-5000 CY OF RESIDUAL MATERIAL SLUICED, 1916.
Comment (Development): EXPLORED VIA UNDERGOUND WORKINGS PRIOR TO 1916; HYDRAULICALLY MINED 1916-17; 3 BULDOZER CUTS MADE IN 1942-43; AK-KX-52-132.
References
Reference (Deposit): USGS MF-247, LOC. 17.
Reference (Deposit): USGS BULLETIN 1246, P. 121.
Reference (Deposit): USGS BULLETIN 1374, P. 83.
Reference (Deposit): USGS OFR 77-796-B, P. 29, LOC. 375-B.
Reference (Other Database): BAG-MF-463-98
Reference (Deposit): USBM RI 4174, P. 30-32.
Reference (Deposit): USGS BULLETIN 662, P. 433, 436, 457.
Reference (Deposit): USGS BULLETIN 722, P. 182, 233-234, 245-246.
Reference (Deposit): USGS OFR 17, P. 3.
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