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Mansfield Mine Group

Producer in Santa Cruz county in Arizona, United States with commodities Copper, Silver, Lead, Gold, Zinc, Manganese
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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 10046337
MRDS ID M241330
Record type Site
Current site name Mansfield Mine Group
Alternate or previous names Sweet, Black Cap, Ruby, Rupert, Lee, Mansfield No. 1 and 2
Related records 10283443

Geographic coordinates

Geographic coordinates: -110.79985, 31.61707 (WGS84)
Elevation 1463
Relative position 6 MILES NNW OF PATAGONIA

Site location context

Political divisions (FIPS codes)

Santa Cruz(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Patagonia(quadrangle 1:24,000 scale)

Fort Huachuca(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Santa Cruz(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Coronado National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Arizona Santa Cruz

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 021S 015E 9,16,10,15 SE (09); N2 OF NE (16); S2 (10); N2 OF NW (15) Arizona

Comments on the location information

  • IN LOWER MANSFIELD CANYON; AT INTERSECTION OF MANSFIELD CANYON AND TEMPORAL GULCH; UTM AND GEODETIC COORDINATES DESCRIBE CENTRAL POINT IN MINE GROUP ; INFO FROM LAND.ST :(1979)

Commodities

Commodity Importance
Copper Primary
Silver Primary
Lead Primary
Gold Secondary
Zinc Critical Secondary
Manganese Critical Tertiary

Comments on the commodity information

  • CHALCOPYRITE AND PYRITE OCCUR IN FINE-GRAINED, MASSIVE FORM

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Biotite Gangue
Hornblende Gangue
Quartz Gangue

Alteration

  • (Local) Wall Rocks Are Strongly Altered; Rhyolite Altered To Quartz

Analytical data

Result ORE VALUES AVERAGED 19% PB, 22 OZ./TON AG, 2% CU, 0.1 OZ./TON AU

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Mount Wrightson Formation;Temporal Formation
    Rock description Mount Wrightson Formation;Temporal Formation
    Stratigraphic age (youngest) Early Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
  • Host or associated Host
    Rock type Plutonic Rock

Nearby scientific data

(1) -110.79985, 31.61707
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Quartz Monzonite Is Intruded And Overlain By Rhyolite
Type of structure Local
Structure description Dominant Structure In Monzonite Dips 35e; Rhyolite Traversed By A Coarse Sheeting Which Dips 60w

Ore body information

  • General form TABULAR
    Strike N70E
    Dip 80S
    Width 1.83M
  • General form TABULAR
    Dip 80S

Controls for ore emplacement

  • Parallel Ne-Trending Quartz Veins Cutting Quartz Monzonite And Along Contact Between Monzonite And Rhyolite

Comments on the geologic information

  • RHYOLITE IS TUFFACEOUS AND CONTAINS FRAGMENTS OF A COARSE ALTERED GRANITOID ROCK; GONE GOSLING CLAIM TO NW OF SWEET SHAFT CONTAINS SILICEOUS LEDGE CARRYING GALENA-SILVER ORE, WHICH DIPS STEEPLY TO SOUTH AND OUTCROPS 12 FT ABOVE SURFACE

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1879
Discoverer Jack Mansfield And Con Ryan
Year of first production 1881
Year of last production 1951

Mining district

District name Mansfield District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Bradsher
    First year 1951

Workings at the site

  • Type of workings Underground
    Length 1219.2M

Comments on the workings information

  • DEVELOPMENTS INCLUDED 360 FT SHAFT WITH LEVELS AT 150, 250, AND 35O FT. ON SWEET CLAIM; 300 FT. OF DRIFTS FROM LEVELS OF SWEET SHAFT; 140-FT SHAFT AND 200-FT TUNNEL WITH LATERALS ON 3 LEVELS AND STOPES, TOTALLING ABOUT 2000 FT OF WORK ON BLACK CAP CLAIM; NUMEROUS SHAFTS, STOPES, AND TUNNELS ON OTHER CLAIMS

Comments on development

  • OWNERS AND OPERATORS INCLUDED GUNSIGHT MINING CO. (1883-1884), A.B. RICHMOND (1903-1906), F.P. O'NEILL, RUBY COPPER CO., MANSFIELD MINING AND SMELTING CO. (1906-1926), PIERCE (1926), LAYCOCK (1934), SOUTHERN ARIZONA MINING CO. (1926), CONSOLIDATED SOUTHERN ARIZONA MINING CO.; PROPERTY COMPRISED 40 CLAIMS, 25 OF WHICH WERE PATENTED, COVERING MORE THAN 3 MILES OF MANSFIELD CANYON AND TEMPORAL GULCH

Reference information

Bibliographic references

  • Deposit

    ABGMT-USBM FILE DATA

  • Deposit

    USBM FILES, MANSFIELD MINE GROUP

  • Deposit

    ADMR FILE DATA, MANSFIELD MINE

  • Deposit

    BLM DISTRICT MINING SHEET 687, 12) USGS PP 748, P. 14-15

  • Deposit

    TENNEY, JAMES B., 1927-29, HISTORY OF MINING IN ARIZONA; ARIZONA BUREAU OF MINES, P. 317-318

  • Deposit

    ROHRBACHER, ROBERT G. 1964, GEOLOGY OF THE TEMPORAL GULCH-MANSFIELD CANYON AREA SANTA CRUZ COUNTY ARIZONA; M.S. THESIS UNIVERSITY OF ARIZONA, P. 69

  • Deposit

    USGS BULL 582, P. 226-229

  • Deposit

    ARIZ BUR MINES BULL 191, P. 90, 11) USGS MAP I-614

  • Deposit

    ABGMT FILES, STANTON B. KEITH

  • Deposit

    ABGMT CLIPPINGS FILE; MANSFIELD MINING AND SMELTING CO., RUPERT GROUP

General comments

Subject category Comment text
Deposit SWEET MINE DEPOSIT LIES ON SOUTH VEIN OF A LARGE LODE THAT STRIKES N70E AND DIPS 80S; BLACK CAP VEIN DIPS 70 SE AND AVERAGES 10 FT. WIDE; PRINCIPAL ORE VALUE OF BLACK CAP VEIN IS 3 FT. WIDE ORE SHOOT OR PAY STREAK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1982 Calder, Susan R. Arizona Bureau of Geology and Mineral Technology

Beyond USGS

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

External references

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.