Unnamed (northeast of Hogan Hill)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001142
MRDS ID A011835
Record type Site
Current site name Unnamed (northeast of Hogan Hill)

Geographic coordinates

Geographic coordinates: -145.45266, 62.67965 (WGS84)
Relative position This occurrence (Cobb, 1979 [OF 79-1247]) is east of the Richardson Highway on the upper reaches of Haggard Creek, about 2.0 miles north-northeast of Hogan Hill (GU008). It is the same locality reported as number 2 by Rose and Sanders (1965, p.14), Mulligan (1974), Richter and Matson (1972), and MacKevett and Holloway (1977). The occurrence is in the SW1/4SE1/4, section 32, T. 11 N., R. 1 W., Copper River Meridian.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore

Alteration

  • (Local) K-feldspar and propylitic (chlorite) alteration of granodiorite adjacent to mineralized fractures (Rose and Saunders, 1965).

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -145.45266, 62.67965

Comments on the geologic information

  • Geologic Description = Pyrite and traces of chalcopyrite occur on fracture surfaces in a late Jurassic(?) granodiorite pluton which is part of the Gulkana River metamorphic complex (Rose and Saunders, 1965; Berg and Cobb, 1967; and Nokleberg and others, 1994).
  • Age = Mineralization is related to granodiorite which is probably Late Jurassic.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = There are old gold prospect pits in the general area but no data on the actual presence of gold (Mulligan, 1974).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011835
USGS Alaska Resource Data File ARDF GU007

Bibliographic references

  • Deposit

    Rose, A.W., and Saunders, R.H., 1965, Geology and geochemical investigations near Paxson, northern Copper River basin, Alaska: Alaska Division of Mines and Minerals Geological Report 13, 35 p.

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p.

  • 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

    Nokleberg, W.J., and others, 1994, Metallogeny and major mineral deposits of Alaska and Metallogenic map of significant metalliferous lode deposits and placer districts of Alaska, in Plafker, G. and Berg, H.C., eds., The Geology of Alaska: Boulder, Colorado, Geological Society of America: The Geology of North America, v. G1, p. 855-904 and v. G1, Plate 11, scale 1:2,500,000.

  • 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

    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 = Rose and Saunders, 1965

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu(?) (Cox and Singer, 1986; model 17)
Deposit Other Comments = See also Hogan Hill (GU008).

Reporter information

Type Date Name Affiliation Comment
Reporter 20-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 20-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 20-DEC-00 W.J. Nokleberg U.S. Geological Survey