East Shaffer Hill Pegmatite

The East Shaffer Hill Pegmatite is a feldspar mine located in Jefferson county, Colorado at an elevation of 7,598 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: East Shaffer Hill Pegmatite

Commodity

Primary: Feldspar
Tertiary: Tantalum
Tertiary: Copper
Tertiary: 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: Unknown
Year First Production: 1945
Discovery Year: 1938
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: TABULAR

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: Host 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: Cleavelandite
Ore: Microlite
Ore: Malachite
Ore: Microcline
Gangue: Monazite
Gangue: Garnet
Gangue: Quartz
Gangue: Magnetite

Comments

Comment (Deposit): ZONED PEGMATITES TREND N 70 TO 90 E AND CONTAIN CORE OF K-FELDSPAR, ROSE TO WHITE OR BLUISH QUARTZ; WALL ZONE OF PATCHY GRAPHIC AND K-FELDSPAR. MICROLITE AND MALACHITE STAINS ON FELDSPAR.

Comment (Workings): THREE OPEN CUTS, DEEPEST IS 8 FT

Comment (Location): ON DIVIDE AREA BETWEEN BEAVER BROOK AND SODA CREEK ABOUT ONE MILE NE OF SHAFFER HILL ; INFO FROM LAND.ST :(1975)

References

Reference (Deposit): BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142

Reference (Deposit): SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337

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

Colorado Mining Photos

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