Mine detail: Sigma Emma Mine

Previously called ''

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Location

Lat / long:

39.71911, -113.2211

Resource(B)

Primary:	Beryllium
Tertiary:	Uranium, Fluorine-Fluorite, Lithium
Ore:	Bertrandite, Uranophane
Gangue:	Calcite, Clay
Orebody form:	TABULAR
Other material:	Fluorite
Discovery year:	1960

Production

Operation type:	Unknown
Production size:	Large
Development status:	Past Producer

Geology

Host rock:	Spor Mountain
Host type:	Volcanic Rock (Aphanitic),Tuff,Volcanic Breccia (Agglomerate)
Associated rock:	Porphyritic Rhyolite Member Of Spor Mountain Formation
Associated type:	Rhyolite
Structure:	Tintic--Deep Creek Mineral Belt, Basin Range High Angle, Faults Tilt Ore-Bearing Strata; Some May Have Been Conduits For Fluids
Tectonic:	Extensional Basin Range Faulting; Accompanied By Bimodal Rhyolite-Basalt Volcanism
Alteration processes:	Argillic: Smectite, Sericite, K-Feldspar

References

MRDS	DE00284
DEP	10021607
Reference	{Deposit:: STAATZ, M.H., 1963, GEOLOGY OF MINERAL DEPOSITS IN THOMAS RANGE: USGS BULL. 1142-M.}{Deposit:: STAATZ, M.H. AND GRIFFITTS, W.R., 1961, BE BEARING TUFF IN THOMAS RANGE: ECONOMIC GEOLOGY V. 56, NO. 5.}{Deposit:: STAATZ, M.H., & OSTERWALD, F.W., 1959, GEOLOGY OF THOMAS RANGE FLUOR DISTRICT: USGS BULL. 1069.}{Deposit:: LINDSEY, D.A., GANON, H., AND MOUNTJOY, W., 1973, HYDROTHERMAL ALTERATION ASSOCIATED WITH BERYLLIUM DEPOSITS AT SPOR MOUNTAN, UTAH: U.S.G.S. PROFESSIONAL PAPER 818-A, 20 P.}{Deposit:: DAVIS, L.J., 1979, BERYLLIUM AND URANIUM MINERALIZATION IN THE SPOR MOUNTAIN AREA, JUAB COUNTY, UTAH: IN NEWMAN, G.W. AND GOODE, H.D., EDS., 1979 BASIN AND RANGE SYMPOSIUM AND GREAT BASIN FIELD CONFERENCE, ROCKY MOUNTAIN ASSOCIATION OF GEOLOGISTS AND UTAH GEOLOGICAL ASSOCIATION, P. 397-403.}
Reporter	Lindsey, David A.