The Unnamed (east of Crater Lake) 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 (east of Crater Lake) MRDS details
Site Name
Primary: Unnamed (east of Crater Lake)
Commodity
Primary: Copper
Secondary: Silver
Secondary: Lead
Secondary: Gold
Location
State: Alaska
District: Ketchikan
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
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Local iron staining. Hydrothermal alteration (sericite, hematite) of country rocks.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Bornite
Ore: Chalcopyrite
Ore: Malachite
Ore: Pyrite
Gangue: Calcite
Gangue: Hematite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c)
Comment (Reference): Primary Reference = Karl, 1992
Comment (Workings): Workings / Exploration = Samples of sulfide-bearing granitic rock and of a pyritic quartz vein contained up to 0.41 ppm Au, 20 ppm Ag, and 2% Cu; a sample of a pyrite- and bornite-bearing quartz-calcite vein contained 0.07 ppm Au, 7 ppm Ag, 1% Cu, and 100 ppm Pb (Karl, 1992, loc. 39a-c).
Comment (Geology): Geologic Description = The country rocks in the area of this site include undivided, metamorphosed Silurian and Ordovician volcanic, sedimentary, and intrusive rocks; and Silurian felsic granitic rocks that intrude the undivided assemblage (Berg, 1972). The rocks were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time, and are intensely sheared, sericitized, and locally permeated with hydrothermal hematite.? the occurrences consist of sparse sulfide pods and sulfide-bearing quartz-calcite veins in the sheared granitic rock (Berg, 1972, loc. 7; Karl, 1992, loc. 39). The metalliferous minerals occur in iron-stained zones an inch or so wide and about a foot long. Sulfides include pyrite, chalcopyrite, and traces of bornite; some of the occurrences contain a little malachite, and the sheared rocks locally contain finely disseminated hematite.? Samples of sulfide-bearing granitic rock and of a pyritic quartz vein contained up to 0.41 ppm Au, 20 ppm Ag, and 2% Cu; a sample of a pyrite- and bornite-bearing quartz-calcite vein contained 0.07 ppm Au, 7 ppm Ag, 1% Cu, and 100 ppm Pb (Karl, 1992, loc. 39a-c).
References
Reference (Deposit): Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360,
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): Karl, S.M., 1992, Map and table of mineral deposits on Annette Island, Alaska: U.S. Geological Survey Open-File Report 92-690, 57 p., 1 map, scale 1:63,360.
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.
