Pargon Mountain

Past Producer in Alaska, United States with commodity Mica

Geologic information

Identification information

Deposit ID 10001929
MRDS ID A012763
Record type Site
Current site name Pargon Mountain

Geographic coordinates

Geographic coordinates: -163.47638, 65.13628 (WGS84)
Relative position The Pargon Mountain mica mine is on the low, mountain front slopes between the two eastern headwater tributaries of Oregon Creek. It is estimated to be between 600 and 800 feet elevation. Oregon Creek is a west tributary to Boston Creek. The headwaters of Oregon Creekare on the flank of Pargon Mountain on the south side of the Bendeleben Mountains. This locality was not included by Cobb (1972; MF 417) but Cobb (1975; OFR 75-429) summarizes references under the name 'Pargon Mtn.'.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Mica Primary

Comments on the commodity information

  • Gangue = feldspar (including albite)

Materials information

Materials Type of material
Muscovite Ore
Biotite Gangue
Calcite Gangue
Garnet Gangue
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Clay coatings on weathered muscovite crystals is present.

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -163.47638, 65.13628

Comments on the geologic information

  • Geologic Description = Granite pegmatite with large muscovite crystals was first prospected here in 1901 (Anderson, 1943). Sheets of muscovite up to 20 inches long and 14 inches wide and commonly 6 inches across have been recovered and used by residents of Nome for stove windows and lamps. The pegmatite is poorly exposed and at least 6 shallow pits, 2 hand-dug trenches, and 4 dozer trenches are present. Imperfections in the muscovite are few and most unweathered crystals are clear and unstained; some strategic mica was recovered and processed in the laboratory during WW II (Anderson, 1943). Other minerals common in the pegmatite are quartz, feldspar (including albite), black tourmaline, and red garnet. Microscopic examination revealed a few small biotite crystals. Some inclusions of magnetite (in mica ?) were also observed. The host pegmatite is in high grade metamorphic rocks of the Bendeleben Mountains (Till and others, 1986).
  • Age = Probably mid-Cretaceous, the age of extensive crustal melting and granitic plutonism in this region (Hudson, 1994).

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Council

Comments on the workings information

  • Workings / Exploration = The pegmatite is poorly exposed and at least 6 shallow pits, 2 hand-dug trenches, and 4 dozer trenches are present (Anderson, 1943).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012763
USGS Alaska Resource Data File ARDF BN134

Bibliographic references

  • Deposit

    Anderson, Eskil, 1943, The Pargon Mountain muscovite prospect, Seward Peninsula, Alaska: Alaska Territorial Department of Mines Pamphlet No. 4, 12 p.

  • Deposit

    Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.

  • Deposit

    Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

  • Deposit

    Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.

  • Deposit

    Hudson, T.L. 1994, Crustal melting events in 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. G-1, p. 657-670.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Anderson, 1943

General comments

Subject category Comment text
Deposit Model Name = Granite pegmatite

Reporter information

Type Date Name Affiliation Comment
Reporter 15-MAR-1999 Travis L. Hudson Applied Geology