Mcmillan Prospect

The Mcmillan Prospect is a copper mine located in Yuma county, Arizona at an elevation of 1,401 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

Name: Mcmillan Prospect  

State:  Arizona

County:  Yuma

Elevation: 1,401 Feet (427 Meters)

Commodity: Copper

Lat, Long: 32.38861, -113.90917

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 Mcmillan Prospect

Mcmillan Prospect MRDS details

Site Name

Primary: Mcmillan Prospect


Commodity

Primary: Copper
Secondary: Uranium


Location

State: Arizona
County: Yuma
District: La Posa 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.
Administrative Organization: Luke Air Force Base


Holdings

Not available


Workings

Type: Surface/Underground


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
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: Sonoran Desert


Mineral Deposit Model

Not available


Orebody

Form: IRREGULAR STRINGERS


Structure

Not available


Alterations

Not available


Rocks

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene


Analytical Data

Analytical Data: SELECTED SAMPLE CONTAINED 0.034% U, 7.69% CU


Materials

Ore: Chrysocolla
Ore: Malachite
Ore: Limonite


Comments

Comment (Geology): AT SOME PLACES IN THE MINE WORKINGS AND ON THE DUMPS, RADIOACTIVITY IS AS MUCH AS FIVE TIMES THE BACKGROUND RADIOACTIVITY. A STOCKPILE OF COPPER-STAINED MATERIAL PRESUMABLY MINED FROM ONE OF THE ADITS GAVE READINGS OF NEARLY 0.5 MR PER HR ON A SCINTILLATION METER. ALTHOUGH IT IS POSSIBLE THAT THE MCMILLIAN PROSPECT CONTAINS LOCAL CONCENTRATIONS OF URANIUM ORE, MOST OF THE RADIOACTIVE ROCK ON THE PROPERTY IS BELOW COMMERCIAL GRADE.

Comment (Deposit): DUPLICATE RECORD M002015 HAS BEEN DELETED.

Comment (Workings): PROPERTY DEVELOPED BY SHALLOW WORKINGS, TWO SHORT ADITS, AND AN OPENCUT.

Comment (Production): NO PRODUCTION RECORD


References

Reference (Deposit): WILSON, E.D., 1933, GEOLOGY AND MINERAL DEPOSITS OF SOUTHERN YUMA COUNTY, ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 139, P. 163.

Reference (Deposit): GRADGER, H.C., RAUP, R.B., 1962, RECONNAISSANCE STUDY OF URANIUM DEPOSITS IN ARIZONA: U.S.G.S. BULLETIN 1147-A, P. 48.


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