Mine detail: Unnamed (Bruce Hills)

Previously called ''

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Location

Lat / long: 58.98273, -136.34311

Resource(M)

Primary: Copper, Molybdenum
Ore: Chalcopyrite, Galena, Hematite, Malachite, Molybdenite, Molybdite, Pyrrhotite, Sphalerite
Gangue: Chlorite, Limonite, Montmorillonite, Quartz

Production

Operation type: Unknown
Development status: Prospect

Geology

Alteration processes:K-feldspar occurs as a secondary mineral in and near quartz veins, and the host granodiorite is anomalously rich in K-feldspar, particularly south and east of the deposit (Kimball and others, 1978, p. C306). Feldspathization was noted elsewhere in the area. Montmorillonite is developed locally. The deposit itself is propylitically altered, with chlorite replacing primary mafic minerals.

References

MRDSA013172
DEP10308917
Reference{Deposit:: Rossman, Darwin, 1963, Geology of the eastern part of the Mount Fairweather quadrangle, Glacier Bay, Alaska: U.S. Geological Survey Bulletin 1121-K, p. K1-K57.}{Deposit:: MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.}{Deposit:: Moerlein, G.A., 1971, Report of examination of Bruce Hills copper-molybdenum deposit, Mt. Fairweather D-2 quadrangle: (Unpublished report available at U.S. Bureau of Land Management Library at Juneau, Alaska).}{Deposit:: Cobb, E.H., 1972, Metallic mineral resources of the Mount Fairweather quadrangle, AK: U.S. Geological Survey Miscellaneous Field Study Map MF-436, 1 sheet, scale 1:250,000.}{Deposit:: Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.}{Deposit:: Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.}
ReporterC.C. Hawley