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  3. Mineral Resource Data System (MRDS)

Unnamed (near the head of Granite Creek)

Occurrence in Alaska, United States with commodities Iron, 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 10307486
Record type Site
Current site name Unnamed (near the head of Granite Creek)

Geographic coordinates

Geographic coordinates: -144.08164, 62.87868 (WGS84)
Relative position The occurrence is at the head of Granite Creek near the west side of a small unnamed lake. It is approximately centered on the north-half of the boundary between sections 27 and 28, T. 12 N., R. 7 E., Copper River Meridian. The location is approximate but is within one-half mile.

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)

Federal lands

Ahtna, Incorporated(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary
Gold Secondary

Materials information

Materials Type of material
Gold Ore
Magnetite Ore

Mineral occurrence model information

Model code 62
USGS model code 18d
Deposit model name Skarn Fe

Nearby scientific data

(1) -144.08164, 62.87868
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = A magnetite skarn occurs in the head of Granite Creek in a region mainly composed of mixed dioritic rocks of Richter's Jurassic 'tectonic quartz-diorite unit' (Richter, 1966). Gold can be panned from the streams that drain the skarn (Kirk Stanley, written communication, 2000). The skarn is on the west side of the diorite complex (WGM Inc., 1979).
  • Age = Possibly associated with emplacement of Richter's (1966) Jurassic, quartz-diorite complex.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = Only natural exposures examined during reconnaissance exploration.

Reference information

Bibliographic references

  • Deposit

    Richter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 2l, 36b p., 3 sheets, scale 1:63,360.

  • Deposit

    WGM Inc., 1979, 1978 Annual Progress Report, Uranium Exploration, Ahtell Creek Area, Volume I: WGM Inc., 39 p., appendices and 4 maps. (Report available, Ahtna Mineral Co., Anchorage, Alaska).

Comments on the references

  • Primary Reference = Richter, 1966; WGM Inc., 1979

General comments

Subject category Comment text
Deposit Model Name = Iron skarn (Cox and Singer, 1986; model 18d)

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.