Lichen

Prospect in Alaska, United States with commodities Silver, Gold, Copper
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 10001450
MRDS ID A012199
Record type Site
Current site name Lichen
Alternate or previous names Rush

Geographic coordinates

Geographic coordinates: -147.35273, 62.88962 (WGS84)
Relative position 6 mi (9.6 km) W of Susitna River; 3 1/2 mi (5.6 km) SE of Coal Lake (Csejtey and Miller, 1978, loc. 18).

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-1(quadrangle 1:63,360 scale)

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

Talkeetna Mountains(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
Gold Primary
Copper Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Covellite Ore
Digenite Ore
Gold Ore
Malachite Ore
Chlorite Gangue
Epidote Gangue

Alteration

  • (Local) Some gossan staining bedrock.

Mineral occurrence model information

Model code 83
USGS model code 22a
Deposit model name Volcanic-hosted Cu-As-Sb
Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Nearby scientific data

(1) -147.35273, 62.88962

Economic information

Comments on the geologic information

  • Geologic Description = Host rocks are meta-volcanics and quartz sandstone of Paleozoic age. Veins and disseminations of sulfides in a zone in a mafic volcanic flow; mineralized zone about 6 ft by 3,000 ft (2 m by 900 m), appears confined to a single flow. Host rocks have undergone greenschist-facies metamorphism.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Two trenches yielding samples showing up to 4.5% Cu, 16 ppm Au, and 68 ppm Ag (Smith and others, 1975).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Smith and others, 1975

General comments

Subject category Comment text
Deposit Model Name = Volcanic-hosted copper, or polymetallic vein, or gold-quartz vein? (Cox and Singer, 1986; model 22a, or 22c, or 36a?)
Deposit Model Number = 22a, or 22c, or 36a?

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.

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.