Prospect, Undetermined

Commodities and mineralogy

Main commodities Au

Geographic location

Quadrangle map, 1:250,000-scale KC
Quadrangle map, 1:63,360-scale B-5
Latitude 55.314
Longitude -131.643
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is known only from U.S. Bureau of Mines (1977) claim records. Its approximate location is on the shoreline of southeastern Gravina Island, about 0.7 mile southeast of the mouth of Clam Cove. The site is in section 6, T. 76 S., R. 91 E., of the Copper River Meridian. It corresponds to loc. 68 in Elliott and others (1978). The location is probably accurate within about 0.1 mile.

Geologic setting

Geologic description

The country rocks on southeastern Gravina Island are Upper Jurassic or Cretaceous marine andesitic or basaltic volcanic rocks that are gradationally interbedded with subordinate flyschlike sedimentary rocks (Berg, 1973; Berg and others, 1988). The strata were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. The country rocks are cut by a high-angle fault along Tongass Narrows that displays about 4 miles of right-lateral offset.
According to U.S. Bureau of Mines claim records (1977), this prospect, which appears to be in andesitic or basaltic metavolcanic rocks, was staked for gold. No other information about it has been made public.
Geologic map unit (-131.644684460884, 55.3136536032087)

Production and reserves

Indication of production None