Unnamed

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Cu
Ore minerals chalcopyrite
Gangue minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale UN
Quadrangle map, 1:63,360-scale B-3
Latitude 53.70833
Longitude -166.95
Nearby scientific data Find additional scientific data near this location
Location and accuracy Just east of the mouth of creek flowing north to Makushin Bay, midway between Traasof Point and USCGS Point Mist. Anomaly no. 3 of Christie (1974).

Geologic setting

Geologic description

Small color anomaly in Unalaska Formation (see Drewes and others, 1961) at granodiorite or diorite intrusive contact. Color anomaly is a zone containing more than 2 percent sulfides (pyrite?) 500 feet (150 m) by 3,000 feet (900 m) in size and elongate to the northwest. A breccia pipe which outcrops on the shore is outside of the iron-stained color anomaly area, but contains some chalcopyrite and has a prominent green stain.
Geologic map unit (-166.951875930892, 53.7074750087447)
Mineral deposit model Porphyry Cu (Cox and Singer, 1986; model 17), Epithermal gold veins (Cox and Singer, 1986; model 25c?).
Mineral deposit model number 17, 25c?
Alteration of deposit Chlorite suggests propylitic alteration. Partial leaching was noted by Christie (1974).

Production and reserves

Workings or exploration Brief reconnaissance mapping and three soil samples collected. Soil samples showed moderate copper and gold anomalies, containing up to 122 ppm Cu and 0.02 ppm Au.
Indication of production None

References

MRDS Number A106019

References

Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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
Last report date 4/14/1994