Gem Park complex (Record #731) occurrence of asbestos in Fremont county, CO

Geologic information

Name of site	Gem Park complex
Development	occurrence
State	CO
County	Fremont
Geographic location:	-105.5449, 38.2669
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Fibrous mineral	asbestiform winchite, asbestiform richterite, asbestiform riebeckite
Associated minerals	aegirine tremolite-actinolite augite phlogopite vermiculite dolomite calcite barite apatite magnetite
Host rock types	pyroxenite, gabbro
Geologic map unit	-105.5449, 38.2669
Nearby scientific data	Find additional scientific data near this location

Reference information

Parker, R.L., and Sharp, W.N., 1970, Mafic-ultramafic igneous rocks and associated carbonatites of the Gem Park Complex, Custer and Freemont Counties, Colorado: U.S. Geological Survey Professional Paper 649, 24 p., 2 plates.

[http://pubs.er.usgs.gov/publication/pp649]

Armbrustmacher, T.J., 1984, Alkaline rock complexes in the Wet Mountains area, Custer and Fremont Counties, Colorado: U.S. Geological Survey Professional Paper 1269, 33 p.

[http://pubs.er.usgs.gov/publication/pp1269]

Van Gosen, B.S., Lowers, H.A., Bush, A.L., Meeker, G.P., Plumlee, G.S., Brownfield, I.K., and Sutley, S.J., 2005, Reconnaissance study of the geology of U.S. vermiculite deposits--Are asbestos minerals common constituents?: U.S. Geological Survey Bulletin 2192, 8 p.

[http://pubs.er.usgs.gov/publication/b2192]