Big Boulder and Iron Ridge Prospect

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

Name: Big Boulder and Iron Ridge Prospect  

State:  Arizona

County:  Maricopa

Elevation:

Primary Mineral: Manganese, Iron

Lat, Long: 33.98, -112.16028

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.


Satelite image of the Big Boulder and Iron Ridge Prospect

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

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"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 at Where to Find Gold in Arizona.