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

Unnamed (on Colorado Creek)

Prospect in Alaska, United States with commodities Gold, Bismuth
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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 10000704
MRDS ID A011339
Record type Site
Current site name Unnamed (on Colorado Creek)
Related records 10185558

Geographic coordinates

Geographic coordinates: -149.56283, 63.24959 (WGS84)
Relative position Placer claims have been recorded along Colorado Creek from the junction with the West Fork Chulitna River upstream for about 2 miles. The map site is in sec. 24, T. 19 S., R. 11 W., of the Fairbanks Meridian. This is locality 4 of Cobb (1978: OFR 78-1062), and locality E-6 of Balen (1990: OFR 34-90).

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Healy A-6(quadrangle 1:63,360 scale)

Healy S(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chulitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Denali National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Bismuth Critical Secondary

Materials information

Materials Type of material
Bismuthinite Ore
Gold Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -149.56283, 63.24959
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The location of the Colorado Creek gold placer is uncertain, and there is no evidence of even minor production. The drainage area includes faulted Mesozoic and Paleozoic sedimentary and volcanic rocks that have been metamorphosed, intruded by a variety of dikes and stocks, and cut by polymetallic veins. of interest are early reports that the placer concentrate contains bismuthinite, marcasite and rather coarse gold (Cobb, 1978: OFR 78-1062). Veins having this mineralogy occur north of the Golden Zone mine (HE043), and possibly also in the Colorado Creek drainage area.
  • Age = Quaternary.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Surface exploration.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Ross, 1933

General comments

Subject category Comment text
Deposit Model Name = Placer Au (Cox and Singer, 1986; model 39a)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-2000 N. Van Wyck Stevens Exploration Management Corporation

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.