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

Middle Fork Chulitna River

Occurrence in Alaska, United States with commodity 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. 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 10307558
Record type Site
Current site name Middle Fork Chulitna River

Geographic coordinates

Geographic coordinates: -149.49281, 63.14958 (WGS84)
Relative position Placer gold occurs along the Middle Fork Chulitna River, upstream from its junction with East Fork Chulitna River to about a mile above Colorado station on The Alaska Railroad. The map site is about at the midpoint of the occurrences, in the SE1/4 of sec. 29, T. 20 S., R. 10 W., of the Fairbanks Meridian. This is location E-27 of Balen (1990: OFR 34-90). The location is accurate to within 1 mile.

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-5(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)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
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) -149.49281, 63.14958
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Middle Fork Chulitna River drains an area containing porphyry, skarn, and polymetallic and epithermal vein deposits all having significant gold contents. These deposits probably are the sources of the placer gold in Middle Fork. Of six samples collected from the placer, two contained measurable gold (Balen, 1990: OFR 34-90).
  • Age = Quaternary.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Surface workings only.

Reference information

Bibliographic references

  • Deposit

    Balen, M.D., 1990, Geochemical sampling results from the Bureau of Mines Investigations in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 34-90, 218 p., 2 plates, scale 1:250,000.

Comments on the references

  • Primary Reference = Balen, 1990 (OFR 34-90)

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-00 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.