Mine detail: Unnamed (western Gravina Island)

Previously called ''

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Location

Lat / long:

55.2628, -131.83566

Resource(M)

Primary:	Copper, Silver
Ore:	Chalcopyrite, Hematite, Molybdenite, Pyrite
Gangue:	Dolomite, Quartz

Production

Operation type:	Unknown
Development status:	Prospect

Geology

Host type:	Rhyolite
Associated type:	Rhyolite
Alteration processes:	Limestone locally is dolomitized, and rhyolite locally contains conspicuous hydrothermal hematite. Local iron- and copper-staining.

References

MRDS	A012320
DEP	10094029
Reference	{Deposit:: Berg, H.C., 1973, Geology of Gravina Island Alaska: U.S. Geological Survey Bulletin 1373, 41 p.}{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.}{Deposit:: Koch, R.D., and Elliott, R.L., 1978, Analyses of rock samples from Ketchikan quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 78-156-A, 162 p., 1 sheet, scale l:250,000.}{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.}
Reporter	H.C. Berg