Anderson Bay

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Mo
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale UN
Quadrangle map, 1:63,360-scale B-3
Latitude 53.6583
Longitude -166.8
Nearby scientific data Find additional scientific data near this location
Location and accuracy At 2,000 ft contour east of Undamak Cove, Anderson Bay. Anomaly no. 10 of Christie (1974).

Geologic setting

Geologic description

Country rock consists of amygdaloidal basic volcanic flows and pyroclastic rocks, often highly ferrigenous. Christie (1974) mentioned, but did not describe a nearby intrusive body. Strongly developed, but very local and irregularly distributed gossan bodies are present due to high amounts of disseminated pyrite in rock. Fracturing is poorly to moderately developed, no orientation was reported. Work focused on two zones, 75 ft (23 m) by 100 ft (30 m) in size that contain up to 5 percent disseminated pyrite.
Geologic map unit (-166.801876655894, 53.6574468287935)
Mineral deposit model Copper porphyry, porphyry copper-molybdenum, epithermal gold vein
Mineral deposit model number 17, 21a, 25
Age of mineralization Cenozoic
Alteration of deposit Only gossan and ferruginous alteration mentioned along with moderate leaching.

Production and reserves

Workings or exploration Forty-two silt and soil samples were collected during reconnaissance mapping. Samples yielded up to 64 ppm molybdenum, 215 ppm copper, 1.6 ppm silver, and 0.05 ppm gold.
Indication of production None


MRDS Number A106024


Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Reporters Damon Bickerstaff, F.H. Wilson
Last report date 5/3/1994