1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed

Occurrence in Alaska, United States with commodities Molybdenum, Gold, Silver
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

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.

Site location context

Political divisions (FIPS codes)

Aleutians West(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Unalaska B-4(quadrangle 1:63,360 scale)

Unalaska NW(quadrangle 1:100,000 scale)

Unalaska SW(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fox Islands(hydrologic unit)

Aleutian Islands(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Alaska Maritime National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

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
ListMap

Economic information

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 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

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

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.