Mine detail: Buckhorn Mica Mine

Previously called 'Claim: Emerald Gem'

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Location

Lat / long:

40.53692, -105.3767

Resource(B)

Primary:	Mica, Beryllium
Tertiary:	Lithium, Niobium (Columbium), Tantalum
Ore:	Beryl, Muscovite, Spodumene
Gangue:	Albite, Cleavelandite, Garnet, Purpurite, Sericite, Tourmaline
Orebody form:	LENTICULAR
Discovery year:	1884

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1884

Geology

Host rock:	Metasedimentary Rocks-Quartz-Biotite Schist;Pegmatite
Host type:	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)
Alteration processes:	Tourmalinization Of Schistose Wallrock; Albite, Cleavelandite, And Sericite Replacement Of Spodumene

References

MRDS	D010316
DEP	10013811
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. 88-90, PL. 11.}{Deposit:: STERRETT, D.B., 1923, MICA DEPOSITS OF THE UNITED STATES: USGS BULL. 740, P. 59-61.}
Reporter	Schwochow, Stephen D.