The Tall Timber Group is a mica, beryllium, and feldspar mine located in Jefferson county, Colorado at an elevation of 7,201 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: 7,201 Feet (2,195 Meters)
Commodity: Mica, Beryllium, Feldspar
Lat, Long: 39.64583, -105.27194
Map: View on Google Maps
Satelite View
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Tall Timber Group MRDS details
Site Name
Primary: Tall Timber Group
Secondary: Tall Timber Nos. 1
Secondary: And 3
Commodity
Primary: Mica
Primary: Beryllium
Primary: Feldspar
Tertiary: Tantalum
Tertiary: Niobium (Columbium)
Location
State: Colorado
County: Jefferson
District: Clear Creek Pegmatite Province
Land Status
Land ownership: Private
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
Not available
Structure
Type: R
Description: Front Range Uplift, Denver Basin
Type: L
Description: Floyd Hill Fault Zone
Alterations
Not available
Rocks
Name: Pegmatite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Muscovite
Ore: Columbite
Ore: Tantalite
Ore: Beryl
Gangue: Tourmaline
Gangue: Garnet
Comments
Comment (Development): OPERATED INTERMITTENTLY FOR FELDSPAR, SCRAP MICA, AND BERYL
Comment (Location): ALONG UNNAMED TRIBUTARIES OF BEAR CREEK 3 TO 3.5 MILES NE OF EVERGREEN. ELEV AND LAT-LONG GIVEN ARE FOR APPROX CENTER NW SEC. 06 ; INFO FROM LAND.ST :(1975)
Comment (Production): ESTIMATED PRODUCTION FROM TALL TIMBERS NOS. 1 AND 3; SMALL PRODUCTION LISTED FOR NO. 3; YEARS UNKNOWN
Comment (Deposit): ZONED PEGMATITES LIE IN FELDSPAR-RICH GNEISS
Comment (Workings): TWO LARGE OPEN CUTS, SEVERAL SMALL OPEN CUTS, ONE TUNNEL
References
Reference (Deposit): SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A.
Reference (Deposit): MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 29
Reference (Deposit): USBM MIN. EXAM. FILE, REPTS. OF 4/6/59 AND 2/9/59 (FROM ORIGINAL CRIB RECORD)
Reference (Production): ORIGINAL CRIB RECORDS (PROBABLY USBM REFERENCE)
Colorado Mining Photos
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