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  3. Mineral Resource Data System (MRDS)

Unnamed (near the West Fork of Ahtell Creek)

Occurrence in Alaska, United States with commodities Gold, Copper
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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 10307485
Record type Site
Current site name Unnamed (near the West Fork of Ahtell Creek)

Geographic coordinates

Geographic coordinates: -144.11264, 62.83968 (WGS84)
Relative position This occurrence is on a minor southwest tributary to the West Fork of Ahtell Creek about 2.3 miles northwest of the junction of Ahtell Creek and its West Fork. It is in the NW1/4, section 9, T. 12 N., R. 7 E., Copper River Meridian. The occurrence is number 3d of WGM Inc. (1980).

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Gulkana NE(quadrangle 1:100,000 scale)

Gulkana(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Copper River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore

Mineral occurrence model information

Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34

Nearby scientific data

(1) -144.11264, 62.83968
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The occurrence is in the contact of the Pennsylvanian to Permian, Ahtell intrusion (Richter, 1966). Stream sediments draining the contact contain 2,000 ppb gold and 450 ppm copper (Richter and Matson, 1968; WGM, 1980). Rock chip samples found in a later follow-up by Homestake Mining Company (Bull, Freeman, and Schneider, 1999) contain more than 1,000 ppm copper and 100 ppb gold. Soils collected in the drainage at about 4,400 foot elevation contain more 500 ppm copper and 100 ppb gold.
  • Age = Uncertain; probably related to the Pennsylvanian to Permian, Ahtell pluton although there is a Jurassic diorite at the head of the drainage that may be related to this occurrence.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Richter and Matson, 1968

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Au(?) (Cox and Singer, 1986; model 20c)
Deposit Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Reporter information

Type Date Name Affiliation Comment
Reporter 06-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 06-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 06-DEC-00 W.J. Nokleberg 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.