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Frank Long

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

Identification information

Deposit ID 10093959
MRDS ID A010572
Record type Site
Current site name Frank Long

Geographic coordinates

Geographic coordinates: -150.61253, 59.50948 (WGS84)
Relative position Pilgrim (1933) located this prospect directly across from Beautiful Island just above the high tide line in the West Arm of Nuka Bay, and 1.5 miles south of the entrance of Beauty Bay. Richter (1970) could not find any signs of this prospect and its location is uncertain.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary

Materials information

Materials Type of material
Arsenopyrite Ore
Gold Ore
Quartz Gangue

Alteration

  • (Local) None reported, although Borden and others (1991) report other veins in the Nuka Bay district show 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;Valdez Group

Nearby scientific data

(1) -150.61253, 59.50948
ListMap

Comments on the geologic information

  • Geologic Description = The quartz vein at this prospect is hosted in Cretaceous Valdez Group graywacke (Richter, 1970). The vein varies from six to 24 inches in width; it strikes S45E and dips nearly vertical. The vein consists of white quartz and arsenopyrite with considerable graywacke fragments. The vein was drifted along strike for 88 feet. A sample of quartz and arsenopyrite taken from the ore stockpile assayed 0.38 ounces of gold and 0.30 ounces of silver per ton (Pilgrim, 1933).
  • 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 production information

  • Production Notes = None reported.

Comments on the workings information

  • Workings / Exploration = The vein was drifted along strike for 88 feet. A sample of quartz and arsenopyrite taken from the ore stockpile assayed 0.38 ounces of gold and 0.30 ounces of silver per ton (Pilgrim, 1933).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010572
USGS Alaska Resource Data File ARDF SV006

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

    Smith, P.S., 1938, Mineral industry of Alaska in 1936: U.S. Geological Survey Bulletin 897-A, p. 1-107.

  • 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

    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.

  • 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.

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 = This property is often combined with the Skinner property. The site is difficult to locate.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-MAR-99 Jeff A. Huber U.S. Geological Survey