Commodities
PrimaryMica, Beryllium
TertiaryLithium, Niobium (Columbium), Tantalum
Commodity typeB
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formLENTICULAR
Materials
Ore mineralsBeryl, Muscovite, Spodumene
GangueAlbite, Cleavelandite, Garnet, Purpurite, Sericite, Tourmaline
Geology
Host rockSchist · Metasedimentary Rocks-Quartz-Biotite Schist;Pegmatite
Associated rockTonalite,Pegmatite · Pegmatite;Tonalite (Quartz Diorite)
StructureFront Range Uplift, Thompson Canyon Fault, Mt Olympus Batholith, Ne-Trending Folds
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationTourmalinization Of Schistose Wallrock; Albite, Cleavelandite, And Sericite Replacement Of Spodumene
Economic & production
Development statusProducer
First production1884
Discovery year1884
Identification
Deposit ID10013811
MRDS IDD010316
Alternate namesClaim: Emerald Gem
RegionNA
Data scoreB
Coordinates40.53692, -105.3767
References
THURSTON, W.R., 1955, PEGMATITES OF THE CRYSTAL MOUNTAIN DISTRICT, LARIMER COUNTY, COLORADO: USGS BULL. 1011, 185 P., 13 PLS.HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROF. PAPER 227, P. 88-90, PL. 11.STERRETT, D.B., 1923, MICA DEPOSITS OF THE UNITED STATES: USGS BULL. 740, P. 59-61.