1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (east of Big Lake)

Occurrence in Alaska, United States with commodities Silver, Zinc, Gold
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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 10001417
MRDS ID A012162
Record type Site
Current site name Unnamed (east of Big Lake)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -148.0447, 62.99155 (WGS84)
Relative position 5 mi (8.0 km) due E of Big Lake; location accurate to within 1/4 mi (400 m) Csejtey and Miller, 1978, loc. 13).

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 D-3(quadrangle 1:63,360 scale)

Talkeetna Mountains NE(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
Silver Primary
Zinc Critical Primary
Gold Secondary

Materials information

Materials Type of material
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Altered, silicified granite

Mineral occurrence model information

Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34
Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -148.0447, 62.99155
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Altered, silicified zone in Tertiary granitic intrusive and wallrock.

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 = Up to 0.5 ppm Ag, 0.12% Zn in analyses of samples of silicified granite and silicified wallrock (Kurtak and others, 1992,)

Reference information

Bibliographic references

  • Deposit

    Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 20 p., 1 plate, scale 1:250,000.

  • Deposit

    Miller, R.J., Cooley, E.F., O'Leary, R.M., Garmezy, larry, Csejtey, Bela, Jr., Smith, T.E., and Cleveland, M.N., 1978, Analysis of geochemical samples from the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-1052, 279 p.

  • Deposit

    Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.

  • 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 = Csejtey and Miller, 1978

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu or polymetallic vein? (Cox and Singer, 1986; model 20c, or 22c?)

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.