Last Chance Mine

The Last Chance Mine is a copper mine located in Pinal county, Arizona at an elevation of 2,989 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: Last Chance Mine
Secondary: Ferguson
Secondary: Owens
Secondary: Last Chance #2
Secondary: Ebeling Copper

Commodity

Primary: Copper
Secondary: Silver

Location

State: Arizona
County: Pinal
District: Owl Head District

Land Status

Land ownership: Private
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: Surface

Ownership

Owner Name: Ferguson, Mrs. Ethel
Years: 1943 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1929
Year Last Production: 1939
Discovery Method: Ore-Mineral In Place
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

Not available

Structure

Type: R
Description: Andesite Is Surrounded By Pinal Schist

Alterations

Not available

Rocks

Name: Andesite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Pliocene

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

Analytical Data

Not available

Materials

Ore: Malachite
Ore: Chalcocite

Comments

Comment (Deposit): THIS RECORD CONTAINS DATA FROM DUPLICATE RECORD D003035 OF J. WILLIAM HASLER WHICH HAS BEEN DELETED FROM MRDS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Location): WITHIN SIGHT OF U.S. 80, NE OF HIGHWAY, WELL AT SITE ; INFO FROM LAND.ST :(1979)

Comment (Development): 60 CLAIMS. 250 FT DRILL HOLE IS NOW WELL, OTHER DRILLING REPORTED, INCLUDING CHURN DRILLING, 1918. OPERATORS INCLUDED J.J. OWENS

Comment (Deposit): ORE IN FRACTURES AND IN AREAS OF HOST ANDESITE, WITH SECONDARY OXIDATION COMMON

Comment (Workings): 250 FT DRILL HOLE, BUT DEPOSIT IS SURFACE ONLY IN PITS. ONE PIT, 60 FT LONG, 17 FT. DEEP. ONE PIT 40 FT. LONG, 4 FT DEEP. ONE VERTICAL PIT, 20 FT DEEP

Comment (Geology): DMEA FILES REPORTED PREC GRANITE-GRANODIORITE AS THE HOST ROCK.

References

Reference (Deposit): ARIZONA DEPARTMENT OF MINERAL RESOURCES FERGUSON COPPER AND LAST CHANCE 2 FILES

Reference (Deposit): USGS MISCELLANEOUS FIELD STUDIES MAP MF 864

Reference (Other Database): CIMRI

Reference (Deposit): ABGMT-USBM PRODUCTION DATA FILES

Reference (Other Database): DMEA

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.