Mine detail: Cheyenne District

Previously called 'St. Peters Dome District'

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Location

Lat / long:

38.74751, -104.91167

Resource(B)

Primary:	Fluorine-Fluorite, Lead, Gold, Silver, Zinc
Secondary:	Thorium, Gemstone, REE
Tertiary:	Niobium (Columbium), Beryllium, Titanium, Metal, Tin, Uranium
Ore:	Astrophyllite, Columbite, Cryolite, Fergusonite, Fluorite, Galena, Pyrochlore, Riebeckite, Sphalerite, Thorite, Topaz, Xenotime, Zircon
Gangue:	Allanite, Anatase, Apatite, Barite, Bertrandite, Cassiterite, Chalcedony, Chlorite, Fayalite, Nacrite, Rutile, Sphene
Discovery year:	1901

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1910
Last production ended:	1945

Geology

Host rock:	Pikes Peak Granite;Mt Rosa Granite
Host type:	Granite
Associated rock:	Pikes Peak Granite;Pegmatite
Associated type:	Syenite,Pegmatite,Granite
Structure:	Front Range Uplift, Pikes Peak Batholith, Mt Rosa Intrusive Center, Ute Pass Fault, Manitou Park Half Graben, Emerald Valley Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Wallrock Silicification In Veins; Alteration Of Fluorite/Cryolite To Rare Mineral Assemblage; Alteration Of Siderite To Hematite And Limonite.

References

MRDS	D010369
DEP	10013843
Reference	{Deposit:: TRIMBLE, D.E., AND MACHETTE, M.N., 1979, GEOLOGIC MAP OF THE COLORADO SPRINGS-CASTLE ROCK AREA, FRONT RANGE URBAN CORRIDOR, COLORADO: USGS MAP I-857-F.}{Deposit:: FINLAY, G.I., 1916, DESCRIPTION OF THE COLORADO SPRINGS QUADRANGLE: USGS FOLIO 203.}{Deposit:: STEVEN, T.A., 1949, GEOLOGY AND FLUORSPAR DEPOSITS OF THE ST. PETERS DOME DISTRICT, COLORADO: COLORADO SCI. SOC. PROC., V. 15, NO. 6, P. 259-284.}{Deposit:: PEARL, R.M., 1965, COLORADO GEM TRAILS AND MINERAL GUIDE: DENVER, SAGE BOOKS, P. 171-180. & &}{Deposit:: OVER, EDWIN, JR., 1929, SOME MINERAL LOCALITIES OF EL PASO COUNTY: ROCKS AND MINERALS, V. 4, NO. 4, P. 106-107 & &}{Deposit:: GLASS, J.J., AND ADAMS, J.W., 1953, GENTHELVITE CRYSTAL FROM EL PASO COUNTY, COLORADO: AM. MINERALOGIST, V. 38, NOS. 9 AND 10, P. 858-860. & &}{Deposit:: PAULY, HANS, 1954, WEBERITE FROM PIKES PEAK, COLORADO: AM. MINERALOGIST, V. 39, NOS. 7 AND 8, P. 669-674. & &}{Deposit:: NELSON-MOORE, J.L., AND OTHERS, 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULL. 40, P. 141-142.}{Production:: STEVEN, 1949}
Reporter	Schwochow, Stephen D.