The Lake is a copper and lead 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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Lake MRDS details
Site Name
Primary: Lake
Commodity
Primary: Copper
Primary: Lead
Location
State: Alaska
District: Hyder
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Galena
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Deposit): Other Comments = Prospect originally staked in 1923.
Comment (Reference): Primary Reference = Berg and others, 1977
Comment (Workings): Workings / Exploration = The Lake prospect was originally staked in 1923 and explored by a few small pits, most of which are caved or overgrown.? A sample collected in 1972 by the U. S. Bureau of Mines (Berg and others, 1977) across the width of the vein assayed 35 ppm Cu, 35 ppm Pb, and 25 ppm Zn.
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = The country rock in the area of the Lake prospect is the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary strata of the Jurassic or older Mesozoic Hazelton Group (Smith, 1977; Berg and others, 1977, p. 17-18; Koch, 1996).? Buddington (1925, p. 74; 1929, p. 101) describes the deposit as a quartz fissure vein 11 inches thick in Texas Creek Granodiorite just below the contact of Hazelton metasedimentary rocks. The footwall of the vein contains abundant galena and subordinate pyrite.? Berg and others (1977, p. 38-39, 84) describe a quartz vein about 3 feet thick in Texas Creek Granodiorite just below the Hazelton contact. About 12 inches of the footwall of the vein contains pyrite, galena, and microscopic traces of chalcopyrite, whereas the upper part of the vein is almost barren. A sample across the width of the vein assayed 35 ppm Cu, 35 ppm Pb, and 25 ppm Zn.
Comment (Deposit): Model Name = Polymetallic veins
References
Reference (Deposit): Berg, H.C., Elliott, R.L., Smith, J.G., Pittman, T.L., and Kimball, A. L., 1977, Mineral resources of the Granite Fiords wilderness study area, Alaska, with a section on aeromagnetic data by Andrew Griscom: U.S. Geological Survey Bulletin 1403, 151 p.
Reference (Deposit): Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.
Reference (Deposit): Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.
Reference (Deposit): Buddington, A.F., 1925, Mineral investigations in southeastern Alasaka: U.S. Geological Survey Bulletin 773, p. 71-139.
Reference (Deposit): Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p.
Reference (Deposit): Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p.
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