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  3. Mineral Resource Data System (MRDS)

Claire Bear

Occurrence in Alaska, United States with commodities Silver, Cobalt, Copper, Gold, Bismuth, Nickel, Antimony, Tin
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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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308254
Record type Site
Current site name Claire Bear
Alternate or previous names Clair Bear

Geographic coordinates

Geographic coordinates: -136.32213, 59.34974 (WGS84)
Relative position This occurrence is approximately 2.1 miles, S60E from Flower Mountain at an elevation of 3,500 to 3,700 feet. It is in the NE1/4, section 21, T. 29 S., R. 54 E. of the Copper River Meridian. It is shown as numbers 128 to 130 by Still and others (1984); site H by Still and others (1987); and site Q by Gilbert and Redman (1989).

Site location context

Political divisions (FIPS codes)

Haines(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Skagway SE(quadrangle 1:100,000 scale)

Skagway C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chilkat-Skagway Rivers(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Cobalt Critical Primary
Copper Primary
Gold Secondary
Bismuth Critical Secondary
Nickel Critical Secondary
Antimony Critical Secondary
Tin Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Nearby scientific data

(1) Keg
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = According to Still and others (1984), this occurrence is in a roof pendant of slate, limestone, and volcanic rocks in diorite. Bedrock samples of a lens of massive sulfides at a dike-limestone contact, and similar float material, contained up to 56.2 ppm silver, 2,290 ppm copper, 1,070 ppm cobalt, 700 ppm tin, 1,000 ppm arsenic, 1,000 ppm bismuth and 7,000 ppm antimony. Still and others (1991) describe the mineralization as, '..narrow, discontinuous pyrrhotite-pyrite-chalcopyrite lenses in marble within the contact aureole of Early Cretaceous quartz diorite - tonalite.' the mineralization is probably Cretaceous, based on the age of the intrusive (MaKevett and others, 1974; Still and others 1991).
  • Age = Probably Early Cretaceous or younger based on the age of the surrounding diorite (MacKevett and others, 1974; Still and others, 1991).

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Probably inactive

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Still and others, 1991

General comments

Subject category Comment text
Deposit Model Name = Probably a replacement deposit (Cox and Singer, 1986: model 19a).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-01 T.C. Crafford T. Crafford & Associates

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.