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Ram

Prospect, Undetermined

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Commodities and mineralogy

Main commodities Cu

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale C-6
Latitude 57.5297
Longitude -135.809
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Ram prospect is at an elevation of about 1,950 feet, about 2 miles east of Waterfall Lake. The prospect is 0.5 mile southeast of the center of sec. 17, T. 50 S., R. 60 E. It is location P-92 of Bittenbender and others (1999) and MAS no. 0021140129 (U.S. Bureau of Land Management, 2002). The location is accurate within 0.5 mile.

Geologic setting

Geologic description

Johnson and Karl (1985) map the rocks in the area of this occurrence as Triassic(?) greenstone intruded by a northwest-striking, linear sill(s) of Cretaceous(?) diorite. The rocks are cut by steeply-dipping, mainly northwest-striking faults; these include the regional-scale Border Ranges Fault whose trace is just southwest of the occurrence. The fault apparently is intruded by the sill(s).
Bittenbender and others (1999), mainly citing Kimball (1982), describe the prospect as a disseminated sulfide deposit in gneissic metavolcanic rocks. Samples contained up to 190 parts per million copper.
Geologic map unit (-135.810804213712, 57.5293426205918)
Mineral deposit model Disseminated sulfide deposit.

Production and reserves

Workings or exploration Only limited surface sampling.
Indication of production Undetermined

Additional comments

The prospect is in West Chichagof-Yakobi Wilderness.

References

References

Bittenbender, P., Still, J.C., Maas, K., and McDonald, M., Jr., 1999, Mineral resources of the Chichagof and Baranof Islands area, southeast Alaska: Bureau of Land Management, BLM-Alaska Technical Report 19, 222 p.
Kimball, A.L., 1982, Mineral land assessment of Yakobi Island and adjacent parts of Chichagof Island, southeastern Alaska: U. S. Bureau of Mines Mineral Land Assessment report, MLA 97-82, 199 p.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
Reporters H.C. Berg (U.S. Geological Survey)
Last report date 10/16/2004