Trepple H

Prospect, Undetermined

Commodities and mineralogy

Main commodities Ni

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale A-4
Latitude 57.0194
Longitude -135.1601
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Trepple H prospect is at an elevation of about 400 feet on the east side of Silver Bay, on an unnamed creek 0.3 mile north of the mouth of Bear Cove. The prospect is in the NE1/4 sec. 13, T. 56 S., R. 64 E. It is MAS no. 0021140161 (U.S. Bureau of Land Management, 2002). The location is accurate within 0.5 mile.

Geologic setting

Geologic description

The rocks in the vicinity of this prospect are part of a Triassic and/or Jurassic unit that consists of biotite schist and gneiss with some amphibolite, quartzite, phyllite, and hornfels (Loney and others, 1975). The unit is a thermal aureole around a large Tertiary tonalite stock. Little is known about this prospect other than that it was staked for nickel (U.S. Bureau of Land Management, 2002). It is shown by name on a map in Bittenbender and others (1999) but is not listed or described in their report.
Geologic map unit (-135.1618635087, 57.0190371282593)
Age of mineralization Triassic or younger based on the age of the host rocks.

Production and reserves

Workings or exploration No information other than that a claim was staked here.
Indication of production None



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. []
Reporters Donald Grybeck (U.S. Geological Survey)
Last report date 5/5/2005