Kalvich Area

Occurrence in Alaska, United States with commodities Fluorine-Fluorite, Lead, Copper, Molybdenum, Tin, Tungsten, Zinc

Geologic information

Identification information

Deposit ID 10001158
MRDS ID A011855
Record type Site
Current site name Kalvich Area

Geographic coordinates

Geographic coordinates: -158.20356, 67.55952 (WGS84)
Relative position Located in the Baird Mountains on ridge near Peak 3475 in T. 25 N., R. 3 E., Kateel River Meridian. Shown as locality 6 in Mayfield and Grybeck (1978) and is accurate to within 2000 ft. (600 m).??
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Fluorine-Fluorite Primary
Lead Primary
Copper Secondary
Molybdenum Secondary
Tin Secondary
Tungsten Secondary
Zinc Secondary

Materials information

Materials Type of material
Fluorite Ore
Galena Ore
Malachite Ore

Mineral occurrence model information

Model code 60
USGS model code 18c
Deposit model name Skarn Zn-Pb
Mark3 model number 22

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Kalvich Pluton; Informal Name
    Rock description Kalvich Pluton; Informal Name
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -158.20356, 67.55952

Comments on the geologic information

  • Geologic Description = Disseminated pyrite, galena, fluorite and malachite in Kalvich pluton along contact zone. Deposit is 1 mi (1.6 km) in strike length. Visual estimate of 1% galena and 1% fluorite in granitic rock along north margin of pluton. About 8 sq. mi. (13 sq km0 of the surrounding area is geochemically anomalous in Pb and Zn. n. The Kalvich pluton is in contact with black siltstone interbedded with marble and quartz-mica schist to the north and east and with gray to black marble of the Skajit limestone to the south and west. The northern margin of the pluton is a migmatitic contact zone containing moderately anomalous Pb, Zn, Mo, Sn and W (Degenhart and others, 1978, p. 340-350).

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both metallic and non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Noatak

Comments on the reserve resource information

  • Reserves = the possibility of even a small tonnage of economic grade material being discovered is remote.

Comments on the workings information

  • Workings / Exploration = A representative bedrock chip sample from a 100 ft. by 7 ft. (33 m x 2 m) area of highly foliated fine grained intrusive rock yielded 86 ppm Cu, 2000 ppm Pb, 94 ppm Zn, 53 ppm Mo, 14 ppm Ag, 34 ppm Sn, 1400 ppm F (Degenhart and others, 1978, p. 340-350).???

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011855
USGS Alaska Resource Data File ARDF AR047

Bibliographic references

  • Deposit

    Degenhart, C.E., Griffis, R.J., McQuat, J.F., and Bigelow, C.G., 1978, Mineral studies of the western Brooks Range performed under contract to the U.S. Bureau of Mines, Contract #JO155089: U.S. Bureau of Mines Open-File Report 103-78, 529 p., 11 sheets.

Comments on the references

  • Primary Reference = Degenhart and others, 1978

General comments

Subject category Comment text
Deposit Model Name = Skarn
Deposit Other Comments = This occurrence is one of several small skarn zones at granitic contacts through out the Ambler River quadrangle (Degenhart and others, 1978). Located in the Noatak National Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 26-OCT-1992 K.R. Leonard U.S. Geological Survey
Reporter 26-OCT-1992 R.L. Elliott U.S. Geological Survey
Reporter 26-OCT-1992 J.M. Schmidt U.S. Geological Survey