Unnamed Occurrences (ARDF - BT012; on upper Kanuti River), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USA i
Regional Level Types
Unnamed Occurrences (ARDF - BT012; on upper Kanuti River) - not defined -
Koyukuk Mining District Mining District
Yukon-Koyukuk Census Area Census Area
Alaska State
USA Country

Regional Level Types
Unnamed Occurrences (ARDF - BT012; on upper Kanuti River)	- not defined -
Koyukuk Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

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Latitude & Longitude (WGS84):

66° 24' 6'' North , 150° 44' 20'' West

Latitude & Longitude (decimal):

G#: beuccb539

Köppen climate type:

Dfc : Subarctic climate

Mindat Locality ID:

201965

Long-form identifier:

mindat:1:2:201965:2

GUID (UUID V4):

85d021d3-48af-4fc6-af4c-e475858af6de

See also: Caribou Mountain (BT011); Lower Kanuti (BT014).
Location: This site includes several similar several occurrences in a northeast-southwest-trending area centered about 2 miles northwest of Caribou Mountain. The center of the occurrences is about 0.2 mile southwest of the center of section 10, T. 18 N., R. 15 W. of the Fairbanks Meridian. The other occurrences extend for about 1 mile northeast and and 1 mile southwest in a band that is about one mile wide.
Geology: Several small occurrences of disseminated and massive chromite in dunite and peridotite were found in the upper Kanuti River ultramafic complex (Foley, 1992). The area is geologically similar to the Caribou Mountain occurrence (BT011), but there is little information specific to this site. Samples contain as much as 1.5% chromium (Foley and McDermott, 1983).
Workings: Only surface sampling.
Age: The chromite is an normal primary constituent of Jurassic or older ultramafic rocks.

Commodities (Major) - Cr; (Minor) - Co, Ni, PGE
Development Status: None
Deposit Model: Podiform chromite (Cox and Singer, 1986; model 8a)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Cobalt

ⓘ Nickel

ⓘ Platinum-Group Metals

Mineral List

ⓘ Chromite

1 valid mineral.

Detailed Mineral List:

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Chromite	4.BB.05	Fe²⁺Cr³⁺₂O₄

List of minerals for each chemical element

O	Oxygen
O	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Cr	Chromium
Cr	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	Iron
Fe	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄

Other Databases

Link to USGS - Alaska:	BT012

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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References

Bottge, R.G., 1986, Maps summarizing land availability for mineral exploration and development in northcentral Alaska, 1985: U.S. Bureau of Mines Open-File Report 70-86, 14 sheets. Clautice, K.H., 1978, Mineral deposits of the Kanuti River area--A summary report: U.S. Bureau of Mines Open-File Report 66-78, 15 p. Foley, J.Y., 1992, Ophiolite and other ultramafic metallogenic provinces in Alaska (west of the 141th meridian): U.S. Geological Survey Open-File Report 92-20-B, 55 p. Foley, J.Y., Barker, J.C., and Brown, L.L., 1985, Critical and strategic minerals investigation in Alaska - chromium: U.S. Bureau of Mines Open-File Report 97-85, 54 p., 1 sheet. Foley, J.Y., and McDermott, M.M., 1983, Podiform chromite occurrences in the Caribou Mountain and Lower Kanuti River areas, central Alaska; Part 1--Reconnaissance investigations: U.S. Bureau of Mines Information Circular 8915, 27 p., 1 sheet. Herreid, G.H., 1969, Geology and geochemistry, Sithylemenkat Lake area, Bettles quadrangle, Alaska: Alaska Division of Mines and Geology Geologic Report 35, 22 p. 1 sheet, scale 1:50,000. Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska: Final Report: U.S. Bureau of Land Management Technical Report 50, v. 1 and 2, 845 p. Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p., 2 plates, scale 1:5,000,000. Patton, W.W., Jr., and Miller, T.P., 1970, Preliminary geologic investigations in the Kanuti River region, Alaska: U.S. Geological Survey Bulletin 1312-J, p. J1-J10.

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