Mcmahan Prospect

The Mcmahan Prospect is a copper mine located in Yuma county, Arizona at an elevation of 620 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

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.

Site Name

Primary: Mcmahan Prospect

Commodity

Primary: Copper
Tertiary: Lead
Tertiary: Iron
Tertiary: Molybdenum

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.

Holdings

Not available

Workings

Type: 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

Structure

Type: L
Description: In This Immediate Vicinity, The Gneiss Has Been Faulted Sufficiently To Show Considerable Variation In Strike And Dip . Fault Zone Striking Se, 2-3 Ft Wide

Alterations

Not available

Rocks

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

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Iron
Ore: Wulfenite
Gangue: Sericite
Gangue: Quartz
Gangue: Calcite

Comments

Comment (Location): ON W SIDE OF COYOTE WASH.

Comment (Deposit): AU, AG, AND CU IN QUARTZ VEINS NEAR APLITIC DIKES. MINERALIZATION ASSOCIATED WITH TWO-MICA GRANITE INTRUSIONS.

Comment (Workings): WORKINGS CONSIST OF A 55 DEG NE INCLINED SHAFT

Comment (Geology): MINERALIZATION IN PREC GNEISS THAT WAS REMETAMORPHOSED IN THE MESOZOIC.

References

Reference (Deposit): WILSON, E.D., 1933, GEOLOGY AND MINERAL DEPOSITS OF SOUTHERN YUMA COUNTY, ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 134, P. 175.

Reference (Deposit): ABGMT FILE DATA

Reference (Deposit): WALLABY ENTERPRISES, TUCSON, AZ, MINING DISTRICT DATA BASE FILE.

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.