The Big Boulder and Iron Ridge Prospect is a manganese and iron mine located in Maricopa 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.
Big Boulder and Iron Ridge Prospect MRDS details
Site Name
Primary: Big Boulder and Iron Ridge Prospect
Commodity
Primary: Manganese
Primary: Iron
Location
State: Arizona
County: Maricopa
District: Tip Top District
Land Status
Land ownership: Federal
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: Otto E. Elwert
Years: 1962 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: L
Description: Laminated, Banded Iron Minerals, Quartz
Alterations
Alteration Type: L
Alteration Text: Silicification
Rocks
Name: Greenstone
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: 24.6-33.1% FE, 1.04-2.5% MN, 31.8-51.8% SIO2, 0.15-0.4% TIO2,, 0.12-0.194% P, 0.1-0.12% S, MAX AND MIN OF 4 SAMPLES. OTHER ANALYSES INDICATED CO, NI, CU, V, AS, PB, ZN
Materials
Ore: Martite
Ore: Limonite
Ore: Hematite
Ore: Hausmannite
Ore: Pyrolusite
Ore: Magnetite
Gangue: Apatite
Gangue: Ilmenite
Gangue: Pyrite
Comments
Comment (Development): 19 CLAIMS AND 3 PLACERS
Comment (Deposit): IRON OXIDE BANDS ARE 1.8 IN. TO SEVERAL FEET THICK
Comment (Geology): TACONITE HAS WELL DEVELOPED SLATLY CLEAVAGE
References
Reference (Deposit): HARRER, USBM IC 8236, 1964, P64-66
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.
