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  3. Mineral Resource Data System (MRDS)

Mansfield Claim

Producer in Greenlee county in Arizona, United States with commodities Copper, Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10026952
MRDS ID M001271
Record type Site
Current site name Mansfield Claim
Alternate or previous names Expectation Group

Geographic coordinates

Geographic coordinates: -109.33065, 33.12621 (WGS84)
Elevation 1935
Location accuracy 100(meters)
Relative position 2.5 MILES ENE OF METCALF, Used Usgs Prof Paper 43, P. 362, Plate 1

Site location context

Political divisions (FIPS codes)

Greenlee(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mitchell Peak(quadrangle 1:24,000 scale)

Clifton(quadrangle 1:100,000 scale)

Clifton(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco(hydrologic unit)

Upper Gila(hydrologic accounting unit)

Upper Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Greenlee

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 003S 029E 35 NW OF SE Arizona

Comments on the location information

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

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary

Materials information

Materials Type of material
Malachite Ore
Epidote Gangue
Orthoclase Gangue
Quartz Gangue

Alteration

  • (Local) Surface Oxidation To Unknown Depths; Porphyry Greatly Bleached By Sericitization And Extensively Cemented By Quartz Veinlets

Analytical data

Result 6 % CU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock
    Rock unit name Morenci Granite Porphyry;Precabrian Granite-Granodiorite Complex
    Rock description Morenci Granite Porphyry;Precabrian Granite-Granodiorite Complex
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -109.33065, 33.12621
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ne-Trending Narrow Porphyry Dikes In Coarse Reddish Quartzitic Granite; Veins Consist Of Many Very Sharply Defined Fissure Planes Striking Nne
Type of structure Local
Structure description Granite Country Rock Fragmented By Small Dike Of Basalt Or Andesite; Volcanic Dike Fractures Porphyry Dike Aout 15 Feet Below Surface

Ore body information

  • General form POCKET
    Strike N E
    Dip 90
    Width 1.83M
    Depth to top 0M

Controls for ore emplacement

  • High-Grade Malachite Ore Occurs In Pockets Along Ne-Trending Dike. Main Ore Body Was Found At A Corss Fracture To The Dike

Comments on the geologic information

  • THE ORE WAS MAINLY OXIDIZED.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1875

Mining district

District name Copper Mountain District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Phelps Dodge Corp., Morenci Branch )
    First year 1922

Workings at the site

  • Type of workings Underground
    Length 91.44M
    Overall depth 45.72M

Comments on the workings information

  • DEVELOPMENTS INCLUDED SMALL SURFACE WORKINGS AND ONE TUNNEL 300 FT LONG

Comments on 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

Reference information

Bibliographic references

  • Deposit

    LINDGREN, 1905, USGS PROF PAPER 43, P. 362-263

  • Deposit

    WEED, 1914, THE COPPER HANDBOOK, V. 11, P. 648, NEW ENGLAND AND CLIFTON COPPER CO

  • Deposit

    STEVENS, 1911, THE COPPER HANDBOOK, V. 10, P. 1284-1285, NEW ENGLAND AND CLIFTON COPPER CO

  • 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.

General comments

Subject category Comment text
Deposit Discovery Year: LATE 1800'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-79 Johnson, Kris H. (Creasey, S.C.) U.S. Geological Survey
Updater 01-JAN-82 Calder, Susan R. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.