Unnamed (upper Granite Creek)

Prospect in Alaska, United States with commodities Copper, Gold, Molybdenum

Geologic information

Identification information

Deposit ID 10308499
MRDS ID A011849
Record type Site
Current site name Unnamed (upper Granite Creek)
Related records 10001153

Geographic coordinates

Geographic coordinates: -144.08264, 62.89968 (WGS84)
Relative position The prospect is at an elevation of about 5,000 feet in a major west-flowing tributary to upper Granite Creek . It is listed as an unnamed prospect by Cobb (1979 [OF 79-1247]). The prospect is near the creek and approximately on the boundary between sections 15 and 16, T. 13 N., R. 7 E., Copper River Meridian. It was listed as locality 9 by both Richter and Matson (1972) and MacKevett and Holloway (1977).
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary
Gold Secondary
Molybdenum Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -144.08264, 62.89968

Comments on the geologic information

  • Geologic Description = The prospect is one of several in or near the western contact zone of a Jurassic diorite to quartz-diorite batholith (Richter and Matsen, 1968; Richter, Lanphere, and Matson, 1975). Stream sediments collected from this zone (area 1, WGM Inc., 1980) were moderately anomalous in gold over a distance of about fifteen miles. According to Kirk Stanley (written communication 2000), chalcopyrite and molybdenite commonly occur along joint surfaces in silica-carbonate rock, which is widely developed near the western contact of the Jurassic pluton. No specific information is known about the prospect.
  • Age = Emplaced subseqent to or is related to the border phase of the Pennsylvanian to Permian, Ahtell pluton.
  • Age = Probably coeval with a Jurassic diorite to quartz-diorite complex.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = The prospect was briefly described to Richter in 1969 by Kirk Stanley. It is probably in or near upper Granite Creek as described by Stanley in a letter to Ahtna Minerals Corporation (written communication, 2000).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF GU037

Bibliographic references

  • Deposit

    Richter, D.H., and Matson, N.A., 1968, Distribution of gold and some base metals in the Slana area, eastern Alaska Range, Alaska: U.S. Geological Survey Circular 593, 20 p.

  • Deposit

    Richter, D.H., Lanphere, M.A., and Matson, N. A., Jr., 1975, Granite plutonism and metamorphism, Eastern Alaska Range, Alaska: Geological Society of American Bulletin, v. 86, p. 819-820.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Gulkana quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1247, 36 p.

  • Deposit

    WGM Inc., 1980, 1979 Summary report of gold potential, Slana District, Ahtna project: WGM Inc., 10 p., 1:63,360-scale map. (Report held by Ahtna Mineral Co., Anchorage, Alaska).

  • Deposit

    Richter, D.H., and Matson, N.A., Jr., 1972, Metallic mineral resources map of the Gulkana quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-419, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Richter and Matson, 1972; WGM Inc., 1980

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Mo(?) (Cox and Singer, 1986; model 21a)
Deposit Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 05-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 05-DEC-00 W.J. Nokleberg U.S. Geological Survey