Jade Mountain Mine, Kiana District, Northwest Arctic Borough, Alaska, USA

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There also has been minor production of nephrite jade from stream gravels of Jade Creek.
Location: Located on south slope of Jade Mountain above Jade Creek in T. 21 N., R. 4 E., Kateel River Meridian. Shown as locality 14 in Mayfield and Grybeck (1978) and accurate to within 2000 ft. (600 m).
Geology: 2 sq. mi. (3.2 square km) area of highly serpentinized ultramafic rock contains residual inclusions of nephrite jade and schistose nephrite containing 0.25-0.5 in. (0.5 -1 cm) wide veinlets of chrysotile and tremolite asbestos; some slip - fiber chrysotile in fibers up to 5 in. (11 cm) long (Anderson, 1945, p. 22-25).
Workings: Short tunnel driven on asbestos veins many years prior to USBM study (Heide and others, 1949).

Commodities (Major) - Jade; (Minor) - Asbestos
Development Status: Yes; small
Deposit Model: Serpentine-hosted asbestos

References

Anderson, Eskil, 1945, Asbestos and jade occurrences in the Kobuk River region, Alaska: Alaska Territorial Department of Mines Pamphlet 3-R, 26 p. Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p. Heide, H.E., Wright, W.S., and Rutledge, F.A., 1949, Investigations of the Kobuk River asbestos deposits, Kobuk district, northwest Alaska: U.S. Bureau of Mines Report of Investigations 4414, 21 p. Mayfield, C.F., and Grybeck, D., 1978, Mineral occurrences and resource map of the Ambler River quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-120-I, 1 sheet, scale 1:250,000.

Mineral List

Chrysotile

'Ferro-actinolite-Tremolite Series var: Nephrite'

Tremolite

3 entries listed. 2 valid minerals.