Occurrence in Alaska, United States with commodities Copper, Gold

Geologic information

Identification information

Deposit ID 10003276
MRDS ID A106019
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -166.95239, 53.70743 (WGS84)
Relative position 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).
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Gangue


  • (Local) Chlorite suggests propylitic alteration. Partial leaching was noted by Christie (1974).

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4
Model code 105
USGS model code 25a-d
Deposit model name Epithermal vein, generic
Mark3 model number 119

Nearby scientific data

(1) -166.95239, 53.70743

Comments on the geologic information

  • 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.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Aleutians

Comments on the workings information

  • Workings / 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.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106019
USGS Alaska Resource Data File ARDF UN025

Bibliographic references

  • Deposit

    Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.

  • Deposit

    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.)

Comments on the references

  • Primary Reference = Christie, 1974

General comments

Subject category Comment text
Deposit Model Name = Copper porphyry, epithermal gold vein(?)
Deposit Model Number = 17, 25

Reporter information

Type Date Name Affiliation Comment
Reporter 14-APR-1994 Damon Bickerstaff U.S. Geological Survey