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  3. Mineral Resource Data System (MRDS)

Unnamed (near Alava Bay)

Prospect in Alaska, United States with commodity Iron
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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. Mineral occurrence model information
  8. Host and associated rocks
  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 10001594
MRDS ID A012352
Record type Site
Current site name Unnamed (near Alava Bay)

Geographic coordinates

Geographic coordinates: -131.15175, 55.21975 (WGS84)
Relative position The approximate location of this prospect is at the south entrance of Alava Bay, about 1.8 mile southwest of Ape Point. The site is in section 6, T. 77 S., R. 94 E., of the Copper River Meridian. It corresponds to loc. 100 in Elliott and others (1978), who erroneously placed it at the north corner of Alava Bay. The location is probably accurate within about 0.5 mile.

Site location context

Political divisions (FIPS codes)

Ketchikan Gateway(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ketchikan A-4(quadrangle 1:63,360 scale)

Ketchikan SW(quadrangle 1:100,000 scale)

Ketchikan(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Ketchikan(hydrologic unit)

Southern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Misty Fiords National Monument Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Titaniferous Magnetitite Ore

Mineral occurrence model information

Model code 23
USGS model code 9
Deposit model name Alaskan Cr-Pt (PGE)
Mark3 model number 120

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock

Nearby scientific data

(1) -131.15175, 55.21975
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks at Alava Bay include: Permian marble; an assemblage of undivided Mesozoic or upper Paleozoic, metamorphosed sedimentary, volcanic, and intrusive rocks; a stock, dikes, and sills of Cretaceous granodiorite; and a plug and associated dikes of ultramafic hornblendite and pyroxenite, also of Cretaceous age (Berg and others, 1988). The marble, the undivided assemblage, and some of the Cretaceous granodiorite were regionally metamorphosed to greenschist grade in middle or Late Cretaceous time. These metamorphic rocks subsequently were remetamorphosed to hornblende hornfels grade near the contacts of intrusive rocks that were emplaced after the regional metamorphism. The structural base of the Permian marble is a thrust fault that dips gently to moderately northeast.? the deposit consists of magmatic titaniferous magnetite in a Cretaceous hornblendite-pyroxenite plug or dike that apparently intrudes both the Cretaceous granodiorite and the undivided metamorphic assemblage (Berg and others, 1978, p. 24,25; Berg and others, 1988). The magnetite occurs as individual crystals and as streaks and small, podlike segregations in the ultramafic rocks. The deposit was examined by private interests in the 1960s, but the results of that examination have not been made public.
  • Age = Cretaceous.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Ketchikan

Comments on the workings information

  • Workings / Exploration = The deposit was examined by private interests in the mid-1960s, but the results of that examination have not been made public.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Berg and others, 1978; Berg and others, 1988

General comments

Subject category Comment text
Deposit Model Name = Alaskan PGE (Cox and Singer, 1986; model 9)

Reporter information

Type Date Name Affiliation Comment
Reporter 04-JUL-1999 H.C. Berg 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.