The Bonus Extension Group is a beryllium mine located in Chaffee county, Colorado at an elevation of 8,556 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: 8,556 Feet (2,608 Meters)
Commodity: Beryllium
Lat, Long: 38.59944, -105.99999
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Bonus Extension Group MRDS details
Site Name
Primary: Bonus Extension Group
Commodity
Primary: Beryllium
Secondary: Niobium (Columbium)
Secondary: Tantalum
Tertiary: Mica
Tertiary: Feldspar
Location
State: Colorado
County: Chaffee
District: Salida Area
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
Owner Name: John Kostelc
Home Office: Salida, Co.
Years: 1974 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Discovery Year: 1955
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: Southern Mosquito Range, Arkansas Valley Graben
Type: L
Description: Ne-Trending Zone Of Pegmatite Dikes
Alterations
Not available
Rocks
Name: Schist
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: COLUMBITE-TANTALITE ABOUT 35% TA2O5
Materials
Ore: Beryl
Ore: Microcline
Ore: Muscovite
Ore: Tantalite
Ore: Columbite
Gangue: Martite
Gangue: Magnetite
Gangue: Quartz
Gangue: Biotite
Gangue: Albite
Comments
Comment (Commodity): BERYL CRYSTALS TO 3 FT LONG
Comment (Location): ON RIDGE SOUTH OF LONGS GULCH, 12 MILES NORTH OF SALIDA VIA COUNTY ROAD 180, LONGS GULCH ROAD, AND MINE ACCESS ROAD ; INFO FROM LAND.ST :(1976); PREVIOUS QUAD DESIGNATION = MONTROSE 1:250000
Comment (Deposit): 9 EN-ECHELON EXPOSURE OF UNZONED BODIES
Comment (Workings): LARGE OPEN CUT 150 X 25 X 15 FT DEEP
Comment (Deposit): Discovery Year: 1950'S
References
Reference (Deposit): MEEVES, H.C., HARRER, C.M., SALSBURY, M.H., KONSELMAN, A.S., SHANNON, S.S., JR., 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: ARIZONA, COLORADO, NEW MEXICO, SOUTH DAKOTA, UTAH, AND WYOMING: USBM INFORMATION CIRCULAR 8298, P. 23.
Reference (Deposit): BOARDMAN, S. J., 1971, PRECAMBRIAN GEOLOGY AND MINERAL DEPOSITS OF THE SALIDA AREA, CHAFFEE COUNTY, COLORADO: PH.D. THESIS, UNIVERSITY OF MICHIGAN, 131 P.
Reference (Deposit): VAN ALSTINE, R.E., 1974, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS SE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 829, 19 P.
Reference (Production): VAN ALSTINE, R.E. (1974)
Reference (Deposit): BOARDMAN, S. J., 1976, GEOLOGY OF THE PRECAMBRIAN METAMORPHIC ROCKS OF THE SALIDA AREA, CHAFFEE COUNTY, COLORADO: THE MOUNTAIN GEOLOGIST, V. 13, NO. 3, P. 89-100.
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