Unnamed (east arm of Whale Bay)

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; Cu; Pb; Zn
Ore minerals chalcopyrite; galena; gold; pyrite; pyrrhotite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale A-4
Latitude 60.1758
Longitude -148.1776
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is on the east shore of Whale Bay at Bebe Point (triangulation station Bebe) about 10 feet above the high tide line in the SE1/4 section 14, T. 1 N., R. 7 E., of the Seward Meridian. The Seward A-4 quadrangle 1:63,360 topographic map (1988 revision) identifies this site as a mine, but there has been no production. This is location S-25 of Jansons and others (1984). This location is accurate to within 300 feet.

Geologic setting

Geologic description

The deposit consists of auriferous, sulfide-bearing, quartz stringers and lenses as much as 4 inches wide in a 2- to 6-foot-wide shear zone that is traceable for 35 feet along its N28E trend. The host rock is silicified mudstone that strikes N 28 E and dips 41NW (Kurtak and Jeske, 1986). Nelson and others (1985) mapped bedrock in this area as Orca Group of early Tertiary age.
Workings on the prospect consist of a 50-foot adit driven on a N 28 E-trending shear zone that dips 30 NW. In the adit, the shear zone consists of (from the hanging wall to footwall) a 3- to 4-inch-wide sulfide-bearing quartz vein; 0.125 inch of fault gouge; 3 to 4 feet of silicified mudstone breccia that contains approximately 15 percent quartz veining; and as much as 2 feet of shear gouge. Minerals associated with the quartz veins include pyrrhotite, pyrite, chalcopyrite, galena, sphalerite, and gold (Kurtak and Jeske, 1986). Samples collected from the adit and float on the beach assayed as much as 0.727 ounce of gold per ton and 0.3 ounce of silver per ton (Kurtak and Jeske, 1986).
Geologic map unit (-148.179635651357, 60.1751530075051)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.
Alteration of deposit Kurtak and Jeske (1986) reported silicified mudstone but gave no details.

Production and reserves

Workings or exploration Workings on the prospect consist of a 50-foot adit driven on a N 28 E-trending shear zone that dips 30 NW. Samples collected from the adit and float on the beach contained as much as 0.727 ounce of gold per ton and 0.3 ounce of silver per ton (Kurtak and Jeske, 1986).
Indication of production None

References