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Unnamed

Occurrence in Alaska, United States with commodity Talc-Soapstone
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10003483
MRDS ID A106241
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -149.39268, 61.72955 (WGS84)
Relative position Upper reaches of Grubstake Gulch, 3,000 ft downstream from head of gulch. Accurate within 1 mile. Locality 143 of MacKevett and Holloway (1977).

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Anchorage C-7(quadrangle 1:63,360 scale)

Anchorage NW(quadrangle 1:100,000 scale)

Anchorage(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Susitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Talc-Soapstone Primary

Comments on the commodity information

  • Ore Material = Talc (soapstone)

Alteration

  • (Local) Serpentinization

Nearby scientific data

(1) KJmu
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = MacKevett and Holloway (1977) report talc (soapstone) associated with serpentinite. The serpentinite is part of the serpentinized Late Cretaceous ultramafic rocks of the area. The serpentinite is located in a shear zone that also cuts Jurassic (?) quartz-albite-chlorite (+/- garnet-biotite) pelitic schist.
  • Age = Late Cretaceous or younger; talc occurs in Late Cretaceous ultramafic rocks.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Willow Creek

Comments on the production information

  • Production Notes = Small tonnages of soapstone are provided for arts and handicraft industries (Eakins and others, 1983).

Comments on the workings information

  • Workings / Exploration = Unknown

Reference information

Bibliographic references

  • Deposit

    Eakins, G.R., Bundtzen, T.K., Robinson, M.S., Clough, J.G., Green, C.B., Clautice, K.H., and Albanese M.A., 1983, Alaska's mineral industry, 1982, Alaska Division of Geological and Geophysical Surveys Special Report 31, 63 p.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.

  • 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 = MacKevett and Holloway, 1977

General comments

Subject category Comment text
Deposit Model Name = Low-temperature metmorhpism of ultramafic rocks.

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey
Reporter 30-JUL-1998 S.W. Huss 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.