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
Elevation: 6,440 Feet (1,963 Meters)
Commodity: Copper
Lat, Long: 38.52583, -109.03139
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.
Pyramid Group MRDS details
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.
