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Volcano Bay

Occurrence in Alaska, United States with commodities Silver, Gold, Zinc
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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 10003306
MRDS ID A106050
Record type Site
Current site name Volcano Bay

Geographic coordinates

Geographic coordinates: -162.0991, 55.22753 (WGS84)
Relative position Approximate location is west of head of Volcano Bay. Anomaly no. 55 of Christie (1974) described as 4 mi (6.4 km) north of Captain Harbor, west of Volcano Bay. Also occurrence no. 12 of MacKevett and Holloway (1977, p. 9).

Site location context

Political divisions (FIPS codes)

Aleutians East(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cold Bay A-1(quadrangle 1:63,360 scale)

Cold Bay(quadrangle 1:100,000 scale)

Cold Bay(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Cold Bay(hydrologic unit)

Aleutian Islands(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Alaska Peninsula 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
Silver Primary
Gold Primary
Zinc Critical Secondary

Materials information

Materials Type of material
Pyrite Ore

Alteration

  • (Local) Granodiorite, in general, is moderately propylitically altered, and contains traces of disseminated pyrite. Locally, granodiorite is completely propylitically altered, having up to 4 percent pyrite either disseminated or in fracture fillings. Although andesitic country rocks generally are not altered, they locally contain zones of intense alteration (destruction of feldspars and mafic minerals) up to 200' (60 m) wide containing as much as 5 percent pyrite.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 105
USGS model code 25a-d
Deposit model name Epithermal vein, generic
Mark3 model number 119

Nearby scientific data

(1) -162.0991, 55.22753
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Color anomaly 12,000 ft by more than 5,000 ft (3,600 m by 1,500+ m) localized around a number of medium-grained granodiorite dikes and a 2,000 by 2,000+ ft (600 by 600+ m) granodiorite plug. Granodiorite intrudes andesite flows and volcaniclastic rocks of the Belkofski(?) Formation.
  • 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 Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = Brief reconnaissance mapping and 15 soil and silt samples (Christie, 1974). Sample results showed generally low copper and molybdenum, zinc to 109 ppm, silver to 2.2 ppm, and gold to 0.2 ppm. Christie (1974) reported covered area to west of anomaly was large enough to hide a porphyry system but lack of copper mineralization makes possibility unlikely.

Reference information

Bibliographic references

  • 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.)

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Christie, 1974

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein, epithermal gold vein
Deposit Model Number = 22c, 25
Deposit Other Comments = Interpretation of andesitic host rocks as Belkofski Formation is based on the reporter's (F.H. Wilson) knowledge of the area and not on Christie's (1974) or MacKevett and Holloway's (1977) report.

Reporter information

Type Date Name Affiliation Comment
Reporter 09-MAY-1994 G.D. DuBois U.S. Geological Survey
Reporter 09-MAY-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.