Lewis Beryl Prospect

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

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.

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

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.