Roscoe Gulch Pegmatites

The Roscoe Gulch Pegmatites is a beryllium, mica, and feldspar mine located in Jefferson county, Colorado at an elevation of 7,461 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

Name: Roscoe Gulch Pegmatites  

State:  Colorado

County:  Jefferson

Elevation: 7,461 Feet (2,274 Meters)

Commodity: Beryllium, Mica, Feldspar

Lat, Long: 39.74722, -105.37278

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.


Satelite image of the Roscoe Gulch Pegmatites

Roscoe Gulch Pegmatites MRDS details

Site Name

Primary: Roscoe Gulch Pegmatites
Secondary: Roscoe Gulch Pegmatite


Commodity

Primary: Beryllium
Primary: Mica
Primary: Feldspar
Secondary: REE


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: Surface
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: Blackhawk Fault, Unnamed Syncline


Alterations

Not available


Rocks

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic


Analytical Data

Not available


Materials

Ore: Beryl
Ore: Monazite
Ore: Muscovite
Ore: Allanite
Ore: Microcline
Gangue: Garnet
Gangue: Magnetite
Gangue: Tourmaline


Comments

Comment (Deposit): TEN UNZONED PEGMATITES IN LIME-SILICATE GNEISS

Comment (Workings): OPEN CUTS

Comment (Location): NORTH OF CLEAR CREEK CANYON AND APPROX ONE MILE NW OF ROSCOE BERYL PROSPECT ; INFO FROM LAND.ST :(1975)

Comment (Deposit): Cobined ifno from 10166922 (derived from MAS 0080590163) and deleted that duplicate record. No references/citations were given.


References

Reference (Deposit): USBM MIN. EXAM. FILE, REPT. OF 6/1/59 (FROM ORIGINAL CRIB RECORD)

Reference (Deposit): MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28

Reference (Deposit): SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A


Colorado Mining Photos

Placer mines at Cripple Creek, Colorado ca. 1892

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