Mine detail: Crystal Silica Mine

Previously called 'Claim: Crystal Silica Placer'

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Location

Lat / long:

40.5347, -105.43615

Resource(B)

Primary:	Mica
Tertiary:	Beryllium, Niobium (Columbium)
Ore:	Beryl, Muscovite
Gangue:	Albite, Apatite, Columbite, Garnet, Microcline
Orebody form:	IRREGULAR
Discovery year:	1900

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1900

Geology

Host rock:	Metasedimentary Rocks-Mica Schist;Pegmatite
Host type:	Mica Schist
Associated rock:	Pegmatite;Tonalite (Quartz Diorite)
Associated type:	Tonalite,Pegmatite
Structure:	Front Range Uplift, Thompson Canyon Fault, Mt Olympus Batholith, Ne-Trending Folds
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D010385
DEP	10013856
Reference	{Deposit:: THURSTON, W.R., 1955, PEGMATITES OF THE CRYSTAL MOUNTAIN DISTRICT, LARIMER COUNTY, COLORADO: USGS BULL. 1011, 185 P., 13 PLS.}{Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROF. PAPER 227, P. 93-96.}
Reporter	Schwochow, Stephen D.