Thorpe

The Thorpe is a gold 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

Name: Thorpe  

State:  Alaska

County:  na

Elevation:

Commodity: Gold

Lat, Long: 61.74306, -149.42500

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Satelite image of the Thorpe

Thorpe MRDS details

Site Name

Primary: Thorpe


Commodity

Primary: Gold
Secondary: Silver


Location

State: Alaska
District: Willow Creek


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
Years of Production:
Organization:
Significant:


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: Gold
Ore: Silver
Gangue: Quartz


Comments

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Jurassic or younger; veins cut Jurassic pelitic schist.

Comment (Reference): Primary Reference = Ray, 1954

Comment (Production): Production Notes = Mining reported 1924-1925 and 1942-1943, amount of production not known.

Comment (Deposit): Other Comments = Thorpe is the only productive mine in the Willow Creek district in schist rather than intrusive rocks (Ray, 1954).

Comment (Workings): Workings / Exploration = Staked prior to 1924. Developed by several hundred feet of workings; open cuts and several adits, however only one crosscut was accessible in 1950. Reportedly a mill and tram were installed prior to 1942. Ray (1933) reported assays to show $25.92 Au (Au at $20.67/oz).

Comment (Geology): Geologic Description = Quartz stringers and veins up to 3.5 ft wide in shear zones that cut foliation and bedding of Jurassic (?) quartz-albite-chlorite (+/- garnet-biotite) pelitic schist bedrock. Veins strike N 50 W, and dips 53 NE (Ray, 1954). Shear zones at Thorpe mine have different attitudes from those of productive veins in tonalite commonly found in region. Veins in schist at Thorpe were the probable source of placer gold in Willow Creek and Grubstake Gulch. Assays show $25.92 Au (Au at $20.67/oz). The gold occurs principally as native metal, but it contains more silver than that from the veins (to the north) in the quartz diorite (Ray, 1933).


References

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Smith, P.S., 1942, Mineral industry of Alaska in 1940: U.S. Geological Survey Bulletin 933-A, p. 1-102.

Reference (Deposit): Moffit, F.H., 1927, Mineral industry in Alaska in 1925: U.S. Geological Survey Bulletin 792-A, p. 1-39.

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.

Reference (Deposit): Smith, P.S., 1942, Mineral Industry of Alaska in 1940: U. S. Geological Survey Bulletin 933-A, p. 1-102.

Reference (Deposit): Ray, R.G., 1954, Geology and ore deposits of the Willow Creek Mining district, Alaska: U.S. Geological Survey Bulletin 1004, 86 p.

Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): Smith, P.S., 1926, Mineral industry of Alaska in 1924: U.S. Geological Survey Bulletin 783-A, p. 1-39.

Reference (Deposit): Smith, P.S., 1932, Mineral industry of Alaska in 1929, in Smith, P.S., and others Mineral resources of Alaska, report on progress of investigations in 1929: U.S. Geological Survey Bulletin 824-A, p. 1-81.

Reference (Deposit): Ray, J.C., 1933, The Willow Creek gold-lode district, Alaska: U.S. Geological Survey Bulletin 849-C, p. 165-229.


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