Unnamed Occurrence (ARDF - BR002; west of Rice Gulch Creek), Black District, Yukon-Koyukuk Borough, Alaska, USA
This page is currently not sponsored. Click here to sponsor this page.
Geology: The general area of this occurrence is underlain mainly by undivided Lower Cambrian and Proterozic rocks of the Tindir Group, which consists predominantly of carbonate, quartzite, argillite, and subordinate volcanic rocks (Dover, 1994). Geologic mapping by Doyon Limited (1987) delineated a small ultramafic body at the western end of a ridge of quartzite and phyllite. The ultramafic body contains minor chalcopyrite and asbestos. The asbestos occurs in 2-inch- to 5-inch-wide veins. Limited outcrop of the ultramafic body did not allow an accurate determination of the density and extent of the asbestos veins. Quartz veins in the ultramafic body contain chalcopyrite (Doyon Limited, 1987).
Commodities (Major) - Asbestos, Cu
Development Status: None
Deposit Model: Asbestos and chalcopyrite associated with a small ultramafic body.
3 entries listed. 2 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Dover, J.A., 1994, Geology of part of east-central Alaska, in Plafker, George, and Berg, H.C., eds., The geology of Alaska, Geological Society of America DNAG, Geology of North America, v. G1, p. 153-204.