Pyramid Group

The Pyramid Group is a copper mine located in Mesa county, Colorado at an elevation of 6,440 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: Pyramid Group
Secondary: Patented Claims: Princess Nos. 1-2, MS 17971
Secondary: Pyramid Nos. 1-4, MS 17971
Secondary: Derby Nos. 1-4, MS 17971
Secondary: Kentucky Boy Nos. 1-3, MS 17971
Secondary: Throughbred Nos. 1-4, MS 17971

Commodity

Primary: Copper
Tertiary: Chromium

Location

State: Colorado
County: Mesa
District: Sinbad District

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

Owner Name: Colorado Copper Co.
Years: 1945 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1908
Discovery Year: 1906
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Canyon Lands

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: R
Description: Paradox Basin Fold And Fault Belt

Type: L
Description: Sinbad Valley Anticline, Sinbad Valley Graben

Alterations

Alteration Type: L
Alteration Text: Oxidation Of Cu Sulfide To Carbonate

Rocks

Not available

Analytical Data

Analytical Data: 14 SAMPLES FROM SURFACE CUT CONTAINED 1.31 TO 8.52 % CU AND LESS THAN 0.20 % CR203.

Materials

Ore: Enargite
Ore: Bornite
Ore: Chalcopyrite
Gangue: Calcite

Comments

Comment (Location): CLAIMS LIE NEAR NW END OF SINBAD VALLEY. ELEV AND LAT-LONG GIVEN ARE FOR PROBABLE TUNNEL SITE DETERMINED FROM AIRPHOTO EXAMINATION IN NW SW NW SEC. 07. ; INFO FROM LAND.ST :1975

Comment (Deposit): MUCH OF INTERIOR OF SINBAD VALLEY CONSISTS OF DEFORMED PENNSYLVANIAN EVAPORITES, SOME IN FAULT CONTACT WITH TRIASSIC AND PERMIAN RED BEDS. IN PYRAMID TUNNEL, WEST- TO SW-DIPPING WINGATE SANDSTONE OVERLIES ALTERED CHINLE FM. CU MINERALIZATION OCCURS IN FRACTURES, WITH CONSIDERABLE DISPERSION INTO SANDSTONE. ALTHOUGH NO SOURCE FISSURE WAS EXPOSED, A VERTICAL POSTMINERAL FAULT TRENDING N 45 W DISPLACES DEPOSIT.

Comment (Workings): PYRAMID TUNNEL DRIVEN S 50 W FOR 220 FT TO FACE. SECOND EXPLORATORY TUNNEL DRIVEN N 60 W FOR 80 FT TO FACE. SEVERAL SURFACE CUTS.

References

Reference (Deposit): BLM MINERAL SURVEY MS 17971

Reference (Deposit): SCHWOCHOW, S.D., 1978, MINERAL RESOURCES SURVEY OF MESA COUNTY, A MODEL STUDY: CGS RESOURCE SER. 2, P. 14-16.

Reference (Deposit): HOLMES, R.V., AND HARRER, C.M., 1952, INVESTIGATION OF THE COLORADO COPPER CO. PROPERTIES, MESA AND MONTROSE COUNTIES, COLORADO: USBM RI-4869.

Colorado Mining Photos

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