Unnamed (divide between upper Partin and Shotgun creeks)

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Antimony

Geologic information

Identification information

Deposit ID 10308502
MRDS ID A011330
Record type Site
Current site name Unnamed (divide between upper Partin and Shotgun creeks)
Related records 10000699

Geographic coordinates

Geographic coordinates: -149.95476, 63.07068 (WGS84)
Relative position This prospect is at an elevation of 6,000 feet on the divide between upper Partin and upper Shotgun creeks. It is in the north-central part of sec. 25, T. 21 S., R. 13 W., of the Fairbanks Meridian. The location of this prospect is known to within 0.25 miles. This is location 24 of Cobb (1978: OFR 78-1062). It is identified by Hawley and others (1978), and incorporated with locality E-34 of Balen (1990: OFR 34-90).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Antimony Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Stibnite Ore
Quartz Gangue

Alteration

  • (Local) High temperature skarn.

Mineral occurrence model information

Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8

Nearby scientific data

(1) -149.95476, 63.07068

Comments on the geologic information

  • Geologic Description = The country rocks in the area of the prospect consists of several hundred meters of Upper Triassic limestone and marble, interbedded with altered, amygdaloidal basalt. The strata are intruded by biotite-quartz diorite porphyry of Late Cretaceous to Early Tertiary age. The deposit consists predominantly of skarn bodies, up to 440 feet long and 3 to 20 feet thick, in an area about 3,000 feet long and 1,000 feet wide. The skarn contains pyrrhotite, up to 5% chalcopyrite, and as much as 2 ounces of gold per ton. Arsenopyrite and stibnite occur both in the skarn and in quartz-arsenopyrite-stibnite veins. Samples from shallow trenches contain up to 0.7% copper, 0.7% antimony, 300 ppm silver, and 63 ppm gold.
  • Age = Late Cretaceous or younger.
  • Age = Probably Late Cretaceous or younger.

Economic information

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 = There has been surface exploration only. The skarn contains pyrrhotite, up to 5% chalcopyrite, and as much as 2 ounces of gold per ton. Arsenopyrite and stibnite occur both in the skarn and in quartz-arsenopyrite-stibnite veins. Samples from shallow trenches contain up to 0.7% copper, 0.7% antimony, 300 ppm silver, and 63 ppm gold.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF HE063

Bibliographic references

  • Deposit

    Hawley, C.C., and Clark, A.L., 1973, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-A, p. 1-10, 2 sheets, scale 1:250,000 and 1:500,000.

  • Deposit

    Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.

  • Deposit

    Hawley, C.C., and others, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska. Contract No. JO166107: U.S. Bureau of Mines Open-File Report 24-78, 274 p., 12 sheets.

  • Deposit

    Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-1062, 113 p.

  • 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.

  • Deposit

    Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1992, Mineral investigations in the Valdez Creek mining district, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 659 p., 2 plates, scale 1:250,000.

  • Deposit

    Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Healy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-394, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Cobb, 1978 (OFR 78-1062)

General comments

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

Reporter information

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