1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Unnamed (upper Black River)

Occurrence in Alaska, United States with commodities Copper, Molybdenum, Gold, Tungsten
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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 10003539
MRDS ID A106297
Record type Site
Current site name Unnamed (upper Black River)
Alternate or previous names Upper Black River

Geographic coordinates

Geographic coordinates: -148.0927, 62.27959 (WGS84)
Relative position Headwaters area of Black River; location accurate to within 1/2 mi (800 m)

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna Mountains B-3(quadrangle 1:63,360 scale)

Talkeetna Mountains SE(quadrangle 1:100,000 scale)

Talkeetna Mountains C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper 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
Copper Primary
Molybdenum Primary
Gold Secondary
Tungsten Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore

Mineral occurrence model information

Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34
Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Nearby scientific data

(1) -148.0927, 62.27959
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Economic information

Comments on the geologic information

  • Geologic Description = Mineralized float samples collected from a large drainage area underlain by Jurassic granodiorite cut by NE-trending shear zones.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Analyses of float samples contain up to 0.15 ppm Au, 0.69% Cu, 446 ppm Mo, 180 ppm W; placer samples have anomalous concentrations of Au, Pb, W, and Zn (Kurtak and others, 1992).

Reference information

Bibliographic references

  • Deposit

    Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1992, Mineral investigations in the Valdez Creek mining district, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 659 p., 2 plates, scale 1:250,000.

Comments on the references

  • Primary Reference = Kurtak and others, 1992

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Au or porphyry Cu-Mo? (Cox and Singer, 1986; model 20c or 21a?)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1996 Riehle, J. 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.