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Cone Mountain

Prospect in Alaska, United States with commodities Uranium, Lead, Zinc
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Geologic information

Identification information

Deposit ID 10000175
MRDS ID A010211
Record type Site
Current site name Cone Mountain

Geographic coordinates

Geographic coordinates: -131.73489, 56.51365 (WGS84)
Relative position The approximate location of the Cone Mountain prospect is in Section 7 at an elevation of about 3000 feet on the west flank of Cone Mountain, about 0.8 mile east of the Kateel River (Elliott and Koch, 1981, p. 7, loc. 4). This location is probably accurate within about a quarter of a mile.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Uranium Primary
Lead Secondary
Zinc Secondary

Comments on the commodity information

  • Ore Material = Unspecified radioactive minerals

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

Nearby scientific data

(1) -131.73489, 56.51365
ListMap

Comments on the geologic information

  • Geologic Description = The country rocks in the general area of the Cone Mountain prospect are a Miocene(?) alkali feldspar granite stock and associated quartz-porphyritic rhyolite dikes (Koch, 1996, 1997). The prospect is on the western margin of the stock, which intrudes Eocene granodiorite and quartz monzonite plutons and Mesozoic or Paleozoic pelitic schist and paragneiss. A group of 145 claims was staked in 1976, presumably for uranium-bearing and related minerals (Elliott and Koch, 1981, loc. 4; Koch and others, 1981; U. S. Geological Survey, 1979). Geochemical surveys [(Koch and Elliott, 1981 (OFR 81-728C-K)] show high values of Ag, Be, Mo, Nb, Pb, Sn, Y and REE, and Zn in rock, stream-sediment and heavy-mineral concentrate samples from the immediate area of the stock. Differentiation enrichment of these elements in such a highly-evolved silicic magma may account for most of the values reported, but a few Pb and Zn values are sufficiently high to suggest local sulfide deposition.
  • Age = Miocene

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Petersburg

Comments on the workings information

  • Workings / Exploration = 145 claims staked in 1976. Claims were active for 2 or 3 years. Exploration by private interests included some diamond drilling. ? Geochemical surveys by the U.S. Geological Survey in the late 1970's [Koch and Elliott, 1981 (OFR 81-728C-K)] show high values of Ag, Be, Mo, Nb, Pb, Sn, Y and REE, and Zn in rock, stream-sediment and heavy-mineral concentrate samples from the immediate area of the stock.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010211
USGS Alaska Resource Data File ARDF BC004

Bibliographic references

  • Deposit

    U.S. Geological Survey, 1979, Aeroradioactivity map of Cone Mountain, Alaska: U.S. Geological Survey Open-File Report 79-830, 1 sheet, scale 1:63,360.

  • Deposit

    Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.

  • Deposit

    Koch, R.D., Elliott, R.L., and Rossiter, Richard, 1981, Total gamma ray intensities at ground stations in the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-840, 2 sheets, scale 1:250,000.

  • Deposit

    Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.

  • Deposit

    Koch, R.D., 1997, Metalliferous mineral resource potential in the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 97-271, 57 p., 1 sheet, scale 1:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of gold and silver in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-C, 2 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of beryllium in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-I, 2 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of copper in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-D, 4 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of zinc in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-F, 4 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of lead in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-E, 4 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of molybdenum in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-G, 2 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of niobium in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-J, 2 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of tin in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-H, 2 sheets, scale l:250,000.

  • Deposit

    Koch, R.D., and Elliott, R.L., 1981, Maps showing distribution and abundance of yttrium in geochemical samples from Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-K, 2 sheets, scale l:250,000.

Comments on the references

  • Primary Reference = Elliott and Koch, 1981

General comments

Subject category Comment text
Deposit Model Name = Felsic plutonic uranium?

Reporter information

Type Date Name Affiliation Comment
Reporter 17-MAY-1998 H. C. Berg U.S. Geological Survey