The Unnamed (west of upper Davis River) is a copper 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
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Unnamed (west of upper Davis River) MRDS details
Site Name
Primary: Unnamed (west of upper Davis River)
Commodity
Primary: Copper
Secondary: Zinc
Secondary: Silver
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: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Conspicuous iron-staining.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Ore: Pyrrhotite
Comments
Comment (Workings): Workings / Exploration = Two random chip samples across about 60 feet of the iron-stained zone assayed up to 2 ppm Ag and 260 ppm Zn (Berg and others, 1977, p. 132).
Comment (Deposit): Model Name = Sparsely disseminated base-metal sulfides
Comment (Reference): Primary Reference = Berg and others, 1977
Comment (Geology): Geologic Description = The country rocks in the area of this occurrence are Tertiary or Cretaceous foliated granodiorite of the Coast Range batholith, and pelitic paragneiss that forms metamorphic roof pendants and screens in the batholith (Berg and others, 1977, p. 10; Berg and others, 1988). The paragneiss consists chiefly of quartz, biotite, feldspar, garnet, and sillimanite. It probably represents marine argillaceous and clastic sedimentary rocks that underwent high-grade regional metamorphism in Cretaceous or Tertiary time. The premetamorphic age of the strata is uncertain, but they probably are mainly Paleozoic and may be as old as Precambrian (Berg and others, 1988, p. 26; Gehrels and others, 1990; Crawford and others, in press).? the occurrence is a conspicuous zone of iron-stained paragneiss 120 feet wide and about 2 miles long (Berg and others, 1977, area M-7, p. 132 and pl. 2). The paragneiss contains small amounts of pyrite, pyrrhotite, and chalcopyrite that form small small pods parallel to the gneissic foliation. Two random chip samples across about half the width of the zone assayed up to 2 ppm Ag and 260 ppm Zn (Berg and others, 1977, p. 132).
Comment (Deposit): Other Comments = Site is in Misty Fiords National Monument Wilderness.
References
Reference (Deposit): Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.
Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.
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): Gehrels, G.E., McClelland, W.C., Samson, S.D., Patchett, P.J., and Jackson, J.L., 1990, Ancient continental margin assemblage in the northern Coast Mountains, southeast Alaska and northwest Canada: Geology, v. 18, p. 208-211.
Reference (Deposit): Crawford, M.L., Crawford, W.A., and Gehrels, G.E., 2000, Terrane assembly and structural relationships in the eastern Prince Rupert quadrangle, British Columbia, in H.H. Stowell and W.C.McClelland, eds., Tectonics of the Coast Mountains, southeastern Alaska and British Columbia: Boulder, Colorado, Geological Society of America Special Paper 343, p. 1-21.?
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
