The Big Bear No. 2 Mine is a ree and feldspar mine located in Jefferson county, Colorado at an elevation of 7,251 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: 7,251 Feet (2,210 Meters)
Commodity: REE, Feldspar
Lat, Long: 39.37583, -105.21111
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Big Bear No. 2 Mine MRDS details
Site Name
Primary: Big Bear No. 2 Mine
Secondary: Big Bear
Secondary: Little Bear
Commodity
Primary: REE
Primary: Feldspar
Location
State: Colorado
County: Jefferson
District: South Platte Pegmatite 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
Type: Unknown
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: ELLIPSOIDAL
Structure
Type: R
Description: Front Range Uplift, Pikes Peak Batholith
Type: L
Description: Kennedy Gulch Fault Zone
Alterations
Alteration Type: L
Alteration Text: Rae Replacement Of Fluorite
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: 0 TO 1% HO, LA, TB, PR.
Analytical Data: HAND-PICKED FLUORITIC ORE FROM BIG BEAR AND OTHER PEGMATITES ASSAYED 1 TO 7.5% Y. RAE CONCENTRATES CONTAINED 47.9% Y, 2.8% GD, 2.3% DY, 3.7% ND, 1 TO 2% ER, SM, AND CE
Materials
Ore: Microcline
Gangue: Doverite
Gangue: Fluorite
Gangue: Xenotime
Gangue: Amethyst
Gangue: Monazite
Gangue: Gadolinite
Gangue: Allanite
Comments
Comment (Deposit): LARGER ELLIPSOIDAL PEGMATITE CONTAINS RELATIVELY THICK WALL ZONE OF QUARTZ-MICROCLINE-BIOTITE AND MICROCLINE-QUARTZ CORE THAT IS TRANSECTED BY LARGE REPLACEMENT UNIT OF FLUORITE AND YTTROFLUORITE AND OTHER RAE. TWO QUARTZ SUBCORES MAPPED IN EXTENSION OF BODY TO NW. OTHER SMALL QUARTZ CORES ISOLATED IN GRANITE BETWEEN MAIN DEPOSITS. SMALLER PEGMATITE TO SE CONTAINS SIMILAR REPLACEMENT UNIT AND REPLACEMENT(?) AMETHYST.
Comment (Workings): TWO OPEN CUTS
Comment (Location): NEAR HEAD OF UNNAMED TRIBUTARY OF SPRING CREEK 1.9 MILES NNW OF LONG SCRAGGY PEAK ; INFO FROM LAND.ST :(1975)
References
Reference (Deposit): SIMMONS, W.B., AND HEINRICH, E.W., 1980, RARE-EARTH PEGMATITES OF THE SOUTH PLATTE DISTRICT, COLORADO: CGS RESOURCE SER. 11, 131 P.
Reference (Deposit): PETERSON, W.L., 1964, GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO: USGS BULL. 1181-C, 23 P., 1 PL.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
