The Black Rock Group is a manganese mine located in Graham county, Arizona at an elevation of 3,999 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: 3,999 Feet (1,219 Meters)
Commodity: Manganese
Lat, Long: 33.08278, -110.43694
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.
Black Rock Group MRDS details
Site Name
Primary: Black Rock Group
Secondary: Davis
Commodity
Primary: Manganese
Secondary: Iron
Tertiary: Copper
Tertiary: Lead
Tertiary: Barium-Barite
Tertiary: Silver
Location
State: Arizona
County: Graham
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Replacement
Operation Type: Unknown
Year First Production: 1951
Year Last Production: 1951
Discovery Year: 1939
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Form: LENTICULAR, IRREGULAR
Structure
Not available
Alterations
Not available
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Paleocene
Analytical Data
Analytical Data: 9.2 % MN, 22.3 % FE, 18 % CAO, 4 % SIO2, 1.8 % AL2O3, 0.8 % ZN
Materials
Ore: Galena
Ore: Hematite
Ore: Barite
Ore: Pyrolusite
Ore: Malachite
Ore: Siderite
Comments
Comment (Commodity): FE TOO INTIMATELY ASSOCIATED WITH MN TO BE ECONOMICAL.
Comment (Location): INDIAN CEDED LAND.
Comment (Development): SIX UNPATENTED CLAIMS.
Comment (Workings): MANY OPEN CUTS, 1 SHAFT, INCLINED AT 20 DEGREES FOR 140 FT.
Comment (Deposit): MANGANIFEROUS FLOAT PRESENT FOR ABOUT 150 FEET NORTH OF THE NORTHERNMOST OPEN CUT.
References
Reference (Deposit): USBM IC 7990, P. 90-91.
Reference (Deposit): USBM RI 3842, P. 9-10.
Reference (Deposit): USBM-ABGMT FILE DATA.
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.
