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Unnamed (head of Hartman River)

Occurrence in Alaska, United States with commodity Copper
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Geologic information

Identification information

Deposit ID 10002165
MRDS ID A013062
Record type Site
Current site name Unnamed (head of Hartman River)

Geographic coordinates

Geographic coordinates: -153.59138, 61.59336 (WGS84)
Relative position This occurrence is in the peaks at the head of the southeast headwaters of the Hartman River. It is at an elevation of about 5,800 feet on the west flank of peak 6215. The map site is in the NW1/4 section 2, T 17 N, R 24 W, of the Seward Meridian. This is locality 5 of Cobb (1972 [MF 412]; Cobb, 1976 [OF 76-485]) and locality 20 of Gamble and others (1989). The location is probably accurate to within a quarter of a mile.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Quartz Gangue

Alteration

  • (Local) Quartz veining.

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone

Nearby scientific data

(1) -153.59138, 61.59336
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Comments on the geologic information

  • Geologic Description = Reed and Elliott (1970) reported a 3-foot-wide quartz vein containing 10 percent arsenopyrite and lesser chalcopyrite, pyrite, and pyrrhotite in a shear zone cutting upper Mesozoic sedimentary rocks at this locality. In addition to base metal anomalies, samples contain up to 10 ppm silver and 0.1 ppm gold. This mineralized area is about a mile from a small Tertiary granitic intrusive.
  • Age = Tertiary Mineralization crosscuts Upper Mesozoic sedimentary rocks. Polymetallic mineralization in this region is commonly associated with Tertiary granitic rocks.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = Reconnaissance sampling has been completed in this area (Reed and Elliott, 1970).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013062
USGS Alaska Resource Data File ARDF LH016

Bibliographic references

  • Deposit

    Gamble, B.M., Bailey, E. A., and Reed, B. L., 1989, Gold occurrences near Snowcap Mountain, Lime Hills B-2 quadrangle, Alaska: U.S. Geological Survey Open-File Report 89-0646, 8 p.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485, 101 p.

  • Deposit

    Reed, B.L., and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open-File Report 70-217, 145 p., 1 sheet, scale 1:250,000. (Also published as U.S. Geological Survey Open-File Report 413).

  • Deposit

    Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Lime Hills quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-412, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Reed and Elliott, 1970

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins (Cox and Singer, 1986, model 22c)

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-2001 Travis L. Hudson Applied Geology
Reporter 10-JUN-2001 Travis L. Hudson Applied Geology