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Hatcher

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Lead, Zinc
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Geologic information

Identification information

Deposit ID 10000412
MRDS ID A010577
Record type Site
Current site name Hatcher
Alternate or previous names Utopia, North Gold
Related records 10136970

Geographic coordinates

Geographic coordinates: -150.51059, 59.57338 (WGS84)
Relative position These prospects are located just south of Pilot Harbor on the west side of the North Arm of Nuka Bay. The Hatcher prospect consists of two short adits near the high tide line, just south of the entrance to Pilot Harbor. The Utopia and North Gold claims are described as being about one mile south of Pilot Harbor and the workings consist of a series of short tunnels and prospect pits which trace multiple white quartz veins up the ridge. This is Cobb's (1972, MF-397) location 24 and Richter's (1970) location 7. Cobb (1979, OFR 80-87) summarized the relevant references to this prospect under the name Hatcher. The location of the two adits is accurate to within 300 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Secondary
Lead Secondary
Zinc Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Borden and others (1991) report carbonization, sulfidization, sericitization, and silicification of the wall rock adjacent to the veins.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Valdez Group
    Rock description Valdez Group
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene

Nearby scientific data

(1) -150.51059, 59.57338
ListMap

Comments on the geologic information

  • Geologic Description = The host rock of the prospects is Cretaceous Valdez Group slates and graywackes (Richter, 1970). The quartz veins are typical of the district and consist of white crystalline quartz with varying amounts of sulfides. Arsenopyrite is the dominate sulfide with decreasing amounts of pyrite, chacopyrite, sphalerite, and galena. Gold occurs as free gold and is associated with arsenopyrite. The veins are confined to the more massive graywacke units and commonly pinch out when they splay into the slate units. The veins at the various tunnels and prospect pits range in width from five inches to over five feet. The general strike of the veins is east-west with a near vertical dip.
  • Age = Tertiary; Boden and others (1991) report other veins in the district are about 55 m.y. old.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Homer

Comments on the workings information

  • Workings / Exploration = The workings consist of several short tunnels and numerous prospect pits. No assay results are reported.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010577
USGS Alaska Resource Data File ARDF SV009

Bibliographic references

  • Deposit

    Pilgrim, E.R., 1933, Progress of lode mining in interior Alaska, 1932: Alaska Territorial Department of Mines Miscellaneous Report 194, 11 p.

  • Deposit

    Cobb, E.H., 1972, Metallic minerals resources map of the Seldovia quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-397, 1 sheet, scale 1:250,000.

  • Deposit

    Borden, J.C., Goldfarb, R.J., Gent, C.A., Burruss, R.C., and Roushey, B.H., 1992 Geochemistry of lode-gold deposits, Nuka Bay district, southern Kenai Peninsula: Geologic studies in Alaska by the U.S. Geological Survey, 1991: U.S. Geological Survey Bulletin 2041, p. 13-21.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Seldovia quadrangle, Alaska: U.S. Geological Survey Open-file Report 80-87, 47 p.

  • Deposit

    Richter, D.H., 1970, Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska: U.S. Geological Survey Professional Paper 625-B, p. Bl-B16.

  • 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.

Comments on the references

  • Primary Reference = Richter, 1970; Pilgrim, 1933

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide, Au-quartz vein (Cox and Singer, 1986; model 36a)
Deposit Other Comments = These prospects are within Kenai Fjords National Park; the area is closed to mineral entry.

Reporter information

Type Date Name Affiliation Comment
Reporter 09-FEB-1999 Jeff A. Huber U.S. Geological Survey