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

Host or associated	Host
Rock type	Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1)	-158.20356, 67.55952	ListMap

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
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