Unnamed

Occurrence in Alaska, United States with commodities Molybdenum, Gold, Silver

Geologic information

Identification information

Deposit ID 10003277
MRDS ID A106020
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -167.03572, 53.6991 (WGS84)
Relative position Near Cape Starichkof, Makushin Bay. Anomaly no. 2 of Christie (1974). Location accurate within approximately 1.5 km.
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Molybdenum Primary
Gold Primary
Silver Primary

Materials information

Materials Type of material
Pyrite Ore
Chlorite Gangue
Epidote Gangue

Alteration

  • (Local) Rocks show propylitic alteration zoned from epidote on periphery to chlorite in interior. Argillic alteration occurs in innermost zones. Partial leaching was noted.

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) -167.03572, 53.6991

Comments on the geologic information

  • Geologic Description = Tabular color anomaly centered on andesite (or altered diorite?) dikes cutting the Unalaska Formation (see Drewes and others, 1961). Occurrence contains 3 percent disseminated sulfides, largely pyrite(?) over an area 300 feet (90 m) by 2 miles (3.2 km). No chalcopyrite was seen.
  • Age = Miocene or younger

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 1 soil sample reported in Christie (1974). Soil sample (W-6) showed 13 ppm Mo, 3.4 ppm Ag, and 0.02 ppm Au.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106020
USGS Alaska Resource Data File ARDF UN026

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    Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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
Reporter 14-APR-1994 F.H. Wilson U.S. Geological Survey