Devils Head Pegmatite District

The Devils Head Pegmatite District is a feldspar and quartz mine located in Douglas county, Colorado at an elevation of 8,501 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

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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: Devils Head Pegmatite District

Commodity

Primary: Feldspar
Primary: Quartz
Secondary: Gemstone
Tertiary: Niobium (Columbium)
Tertiary: Thorium
Tertiary: Beryllium
Tertiary: REE
Tertiary: Tin

Location

State: Colorado
County: Douglas
District: Devils Head 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

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: District
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1930
Year Last Production: 1970
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, Pikes Peak Batholith, Rampart Range Uplift

Type: L
Description: Perry Park-Jarre Canyon Fault, Rampart Range Fault, Manitou Half Graben

Alterations

Not available

Rocks

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: Quartz
Ore: Microcline
Gangue: Cassiterite
Gangue: Monazite
Gangue: Cleavelandite
Gangue: Fluorite
Gangue: Pyrochlore
Gangue: Euxenite
Gangue: Xenotime
Gangue: Allanite
Gangue: Parisite
Gangue: Biotite
Gangue: Garnet

Comments

Comment (Development): FELDSPAR QUARRIES OPENED IN 1930S WITH SPORADIC PRODUCTION FOR GLASS AND CERAMIC MANUFACTURE. LATER MINOR PRODUCTION OF WHITE QUARTZ FOR DECORATIVE STONE. INTERMITTENT COLLECTING OF TOPAZ AND AMAZONITE SPECIMENS.

Comment (Deposit): DISTRICT CONTAINS SMALL ZONED AND UNZONED PEGMATITES WITH OUTER ZONES OF GRAPHIC GRANITE GRADING INTO GRANITE WALLROCK, INTERMEDIATE ZONES OF QUARTZ-PLAGIOCLASE-BIOTITE, AND CENTRAL ZONES OR CORES OF QUARTZ. MAJOR MINERALS INCLUDE MICROCLINE, QUARTZ, TOPAZ, AND KAOLINITE; MINOR ACCESSORIES INCLUDE FLUORITE AND CLEAVELANDITE; RARE ACCESSORIES INCLUDE BERYL, YTTROFLUORITE, ALLANITE, EXNOTIME, EUXENITE, MONAZITE, PYROCHLORE, AND THORITE.

Comment (Workings): OPEN CUTS, MOST FACES WORKED ON BENCHES

Comment (Location): MINES GENERALLY FOUND ALONG CREST OF RAMPART RANGE AROUND PROMINENT TOPOGRAPHIC FEATURE, DEVILS HEAD. MINES ALSO LOCATED ON DEVILS HEAD AND DECKERS QUADS. NONMETALLIFEROUS PEGMATITE QUARRIES LOCATED IN SEC. 18, T9S, R68W, SEC. 6, T1OS, R68W, AND SECS. 13 AND 23, T1OS, R69W. LAT-LONG GIVEN FOR DISTRICT IS FOR DEVILS HEAD (SECS. 15 AND 22, T9S, R69W). ; INFO FROM LAND.ST :(1974)

Comment (Deposit): DETAILED RECORDS PREPARED FOR QUARRIES PRODUCING FELDSPAR AND QUARTZ AND REPORTING OTHER METAL OCCURRENCES (RAE, BE, MON, NB, TH, SN): CALIFORNIA, CRAMER, CRAMER NO. 2, DENVER, DEVILS HEAD PROSPECT, LITTLE EDDY, LONE PINE, LOST DUTCHMAN, MILLER LODE, PRINCETON GROUP, SKELETON NO. 2, SPIELMAN, THREE MUSKETEERS, WATSON PARK. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

References

Reference (Deposit): MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 24-25.

Reference (Deposit): BRYANT, BRUCE, AND OTHERS, 1981, GEOLOGIC MAP OF THE DENVER 1X2 QUADRANGLE, NORTH-CENTRAL COLORADO: USGS MAP

Reference (Deposit): HEINRICH, E.W., 1957, PEGMATITE PROVINCES OF COLORADO: COLORADO SCHOOL MINES QUART, V. 52, NO. 4, P. 1-22.

Reference (Deposit): TRIMBLE, D.E., AND MACHETTE, M.N., 1979, GEOLOGIC MAP OF THE COLORADO SPRINGS-CASTLE ROCK AREA, FRONT RANGE URBAN CORRIDOR, COLORADO: USGS MAP I-857-F. &&

Reference (Deposit): HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 31-32.

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