The Colorada Group is a lead and silver mine located in Yuma county, Arizona.
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.
Colorada Group MRDS details
Site Name
Primary: Colorada Group
Secondary: Colorado Group
Secondary: Lincoln
Secondary: La Colorado
Secondary: Modesti Property
Commodity
Primary: Lead
Primary: Silver
Secondary: Fluorine-Fluorite
Tertiary: Molybdenum
Tertiary: Barium-Barite
Location
State: Arizona
County: Yuma
District: Castle Dome District
Land Status
Administrative Organization: Kofa National Wildlife Refuge
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Fluorite
Ore: Galena
Ore: Wulfenite
Gangue: Calcite
Gangue: Barite
Comments
Comment (Production): ROUGH ESTIMATE FOR TOTAL PRODUCTION OF ENTIRE CASTLE DOME DISTRICT (SEVEN MINE SITES). FLUORSPAR PRODUCTION IS PROBABLY A BY-PRODUCT OF LEAD MINING.
Comment (Deposit): GREEN, PURPLE, AND ROSE-COLORED FLUORITE ASSOCIATED WITH CALCITE, BARITE, GALENA, AND WULFENITE OCCURS IN VEINS WHERE MESOZOIC SHALE, IMPURE LIMESTONE, SILTSTONE, AND SCHIST HAVE BEEN INTRUDED BY RHYOLITE PORPHYRY AND DIORITE PORPHYRY. MAIN HOST ROCK IS CRETACEOUS SHALE. VEINS SPLIT AND BRANCH BUT ARE TRACEABLE FOR 4000 FT. FLUORITE ORE USUALLY LESS THAN 5 FT THICK. VEINS LOCALLY CONTAIN 40-60 PERCENT FLUORITE.
References
Reference (Deposit): "MINERAL AVAILABILITY SYSTEMS: ARIZONA FLUORSPAR", ARIZONA DMR, MARCH 1976.
Reference (Deposit): VAN ALSTINE, R.E., 1969, "FLUORSPAR", IN ABM BULLETIN 180, USGS BULLETIN 871, P. 354.
Reference (Deposit): PEIRCE, H.W., 1990, ARIZONA GEOLOGICAL SURVEY INDUSTRIAL MINERAL CARD FILES.
Reference (Deposit): PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.
Reference (Other Database): CIMRI
Arizona Gold
"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.
