The Lewis Beryl Prospect is a mica and beryllium mine located in Larimer county, Colorado at an elevation of 9,482 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: 9,482 Feet (2,890 Meters)
Commodity: Mica, Beryllium
Lat, Long: 40.4825, -105.38556
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Lewis Beryl Prospect MRDS details
Site Name
Primary: Lewis Beryl Prospect
Commodity
Primary: Mica
Primary: Beryllium
Location
State: Colorado
County: Larimer
District: Crystal Mountain (Storm Mountain) 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: Surface/Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1943
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: OVOID
Structure
Type: R
Description: Front Range Uplift
Type: L
Description: Thompson Canyon Fault, Mt Olympus Batholith, Ne-Trending Folds
Alterations
Not available
Rocks
Name: Tonalite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Tonalite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Muscovite
Ore: Beryl
Gangue: Microcline
Gangue: Albite
Comments
Comment (Workings): TWO OPEN CUTS (15 X 3 X 2 FT AND 10 X 4 X 2 FT); 10-FT-DEEP SHAFT
Comment (Deposit): ZONED PEGMATITE TRENDS EAST-WEST, DIPS 70 S, PROBABLY CONFORMABLE TO ENCLOSING SCHIST. WALL ZONE IS FINE-GRAINED QUARTZ-POTASH FELDSPAR-MUSCOVITE PEGMATITE CONTAINING NO BERYL. CORE IS COARSE-GRAINED K-FELDSPAR, QUARTZ, ALBITE, AND FINE-GRAINED AGGREGATES OF MUSCOVITE. BERYL FOUND AS EUHEDRAL RADIAL MASSES OF CRYSTALS ASSOCIATED WITH QUARTZ.
Comment (Location): ON SOUTH SLOPE OF STORM MOUNTAIN ON W-PROJECTING RIDGE 4.6 MILES SE OF CRYSTAL MOUNTAIN. ELEV AND LAT-LONG GIVEN ARE FOR POSSIBLE EXCAVATION IN NE SE SEC. 18 (DETERMINED FROM AIRPHOTO EXAMINATION). ; INFO FROM LAND.ST :(1977)
References
Reference (Deposit): THURSTON, W.R., 1955, PEGMATITES OF THE CRYSTAL MOUNTAIN DISTRICT, LARIMER COUNTY, COLORADO: USGS BULL. 1011, 185 P., 13 PLS.
Reference (Deposit): HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROF. PAPER 227, P. 102.
Colorado Mining Photos
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