Mansfield Claim

The Mansfield Claim is a copper mine located in Greenlee county, Arizona at an elevation of 6,348 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: Mansfield Claim
Secondary: Expectation Group

Commodity

Primary: Copper
Secondary: Gold
Secondary: Silver

Location

State: Arizona
County: Greenlee
District: Copper Mountain 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: Underground

Ownership

Owner Name: Phelps Dodge Corp., Morenci Branch )
Years: 1922 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1875
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

Form: POCKET

Structure

Type: R
Description: Ne-Trending Narrow Porphyry Dikes In Coarse Reddish Quartzitic Granite; Veins Consist Of Many Very Sharply Defined Fissure Planes Striking Nne

Type: L
Description: Granite Country Rock Fragmented By Small Dike Of Basalt Or Andesite; Volcanic Dike Fractures Porphyry Dike Aout 15 Feet Below Surface

Alterations

Alteration Type: L
Alteration Text: Surface Oxidation To Unknown Depths; Porphyry Greatly Bleached By Sericitization And Extensively Cemented By Quartz Veinlets

Rocks

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

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

Analytical Data

Analytical Data: 6 % CU

Materials

Ore: Malachite
Gangue: Quartz
Gangue: Epidote
Gangue: Orthoclase

Comments

Comment (Deposit): Discovery Year: LATE 1800'S

Comment (Development): OWNERS INCLUDED CLIFTON CONSOLIDATED COPPER MINES CO, NEW ENGLAND AND CLIFTON COPPER MINES CO (1903-1912), DETROIT COPPER MINES CO OF ARIZONA (1912-1921); MANSFIELD CLAIM WAS UNPATENTED

Comment (Workings): DEVELOPMENTS INCLUDED SMALL SURFACE WORKINGS AND ONE TUNNEL 300 FT LONG

Comment (Geology): THE ORE WAS MAINLY OXIDIZED.

Comment (Location): 0.5 MILE NNW OF SUMMIT OF COPPER KING MOUNTAIN; ON RIDGE DESCENDING INTO PLACER GULCH ; INFO FROM LAND.ST :(1973)

References

Reference (Deposit): STEVENS, 1911, THE COPPER HANDBOOK, V. 10, P. 1284-1285, NEW ENGLAND AND CLIFTON COPPER CO

Reference (Deposit): BENNETT, 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE COUNTY, ARIZONA: M.S. THESIS UNIVERSITY OF ARIZONA, 153 P.

Reference (Deposit): LINDGREN, 1905, USGS PROF PAPER 43, P. 362-263

Reference (Deposit): WEED, 1914, THE COPPER HANDBOOK, V. 11, P. 648, NEW ENGLAND AND CLIFTON COPPER CO

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.