Snow Slide

Prospect, Undetermined

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale D-7
Latitude 57.7945
Longitude -136.2518
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Snow Slide prospect is at an elevation of about 600 feet, about 0.15 mile north of the north head of Baker Cove in Goulding Harbor. The prospect is 0.5 mile west of the center of sec. 18, T. 47 S., R. 57 E. It is location P-47 of Bittenbender and others, (1999), location 19 of Cobb (1972, 1977), and MAS no. 0021140107 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.5 mile.

Geologic setting

Geologic description

Johnson and Karl (1985) map the rocks in the area of this prospect as the Freeburn assemblage, a collage of kilometer-scale, fault-bounded, lozenge-shaped blocks of Cretaceous and Cretaceous(?) metasedimentary and metavolcanic rocks. The rocks are cut by high-angle, mainly northwest-striking faults, one of which transects the prospect area.
Cobb (1972, 1978), citing Overbeck (1919), describes the prospect as a 6-foot zone of quartzose greenschist containing pyrite, chalcopyrite, and possibly some pyrrhotite. Two claims were located in 1916. A 171-foot tunnel driven to intersect the zone at depth did not reach it.
Geologic map unit (-136.253630077602, 57.7941250087391)
Mineral deposit model Basaltic copper? (Cox and Singer, 1986; model 23).
Mineral deposit model number 23?

Production and reserves

Workings or exploration Two claims were located in 1916. A 171-foot tunnel driven to intersect the mineralized zone at depth did not reach it.
Indication of production Undetermined

Additional comments

The prospect is in West Chichagof-Yakobi Wilderness.

References

MRDS Number A013257

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.
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