The Eureka Shaft is a fluorine-fluorite mine located in El Paso county, Colorado at an elevation of 8,819 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 8,819 Feet (2,688 Meters)
Commodity: Fluorine-Fluorite
Lat, Long: 38.75083, -104.90083
Map: View on Google Maps
Eureka Shaft MRDS details
Site Name
Primary: Eureka Shaft
Commodity
Primary: Fluorine-Fluorite
Secondary: Gemstone
Tertiary: Titanium, Metal
Location
State: Colorado
County: El Paso
District: Cheyenne (St. Peters Dome) District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: IRREGULAR
Structure
Type: R
Description: Front Range Uplift, Pikes Peak Batholith
Type: L
Description: Mt Rosa Intrusive Center, Ute Pass Fault, Manitou Park Half Graben
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Cryolite
Ore: Fluorite
Gangue: Riebeckite
Gangue: Nacrite
Gangue: Rutile
Gangue: Zircon
Gangue: Microcline
Comments
Comment (Location): EXACT LOCATION UNCERTAIN BUT COULD BE SHAFT NW NW SEC. 16 0.6 MILE NE OF ST. PETERS DOME. ELEV AND LAT-LONG GIVEN ARE FOR SAID SHAFT. EUREKA TUNNEL PROBABLY IN SW SW SEC. 09 OR NW NW NW SEC. 16. ; INFO FROM LAND.ST :(1981)
Comment (Commodity): THIS MINE IS ONLY DESCRIBED NACRITE LOCALITY IN COLORADO AND ALSO PROBABLY THE SITE OF DISCOVERY OF WEBERITE IN OLDER SPECIMENS ORIGINALLY THOUGHT TO BE CRYOLITE.
Comment (Deposit): COUNTRY ROCK OF PIKES PEAK GRANITE INTRUDED BY SMALL STOCKS AND PLUGS OF FAYALITE GRANITE AND CUT BY N 60 W-TRENDING APLITE DIKES. ROCK FRACTURED BY FIRST-GROUP JOINTS AT N 50 TO 60 W, VERTICAL, AND BY SECOND-GROUP JOINTS AT N 30 E, 40 TO 70 SE. IRREGULAR RIEBECKITE-CRYOLITE PEGMATITE OCCURS NE OF SHAFT BELOW ROAD PROBABLY AT SITE OF TUNNEL. SPECIMEN TOPAZ NOTED FOR EXCELLENT FORM AND BEAUTIFUL COLORS OF PINK, EMERALD GREEN, LIGHT WINE TO HONEY YELLOW, PURPLE, RICH REDDISH BROWN.
Comment (Workings): ONE SHAFT OF UNKNOWN DEPTH AND POSSIBLY ONE TUNNEL
References
Reference (Deposit): FINLAY, G.I., 1916, DESCRIPTION OF THE COLORADO SPRINGS QUADRANGLE: USGS FOLIO 203.
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.
Reference (Deposit): PAULY, HANS, 1954, WEBERITE FROM PIKES PEAK, COLORADO: AM. MINERALOGIST, V. 39, NOS. 7 AND 8, P. 669-674.
Reference (Deposit): OVER, EDWIN, JR., 1929, SOME MINERAL LOCALITIES OF EL PASO COUNTY: ROCKS AND MINERALS, V. 4, NO. 4, P. 106-107.
Reference (Deposit): PEARL, R.M., 1965, COLORADO GEM TRAILS AND MINERAL GUIDE: DENVER, SAGE BOOKS, P. 171-180.
Reference (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.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
