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St. George Claim

Producer in Cochise county in Arizona, United States with commodities Copper, Zinc, Molybdenum, Tungsten
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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. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10109600
MRDS ID M050004
Record type Site
Current site name St. George Claim
Alternate or previous names Leopold
Related records 10258095

Geographic coordinates

Geographic coordinates: -110.05899, 32.09123 (WGS84)
Elevation 1486
Relative position 3/4 MILE SE OF TOWN OF JOHNSON.

Site location context

Political divisions (FIPS codes)

Cochise(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dragoon(quadrangle 1:24,000 scale)

Tucson(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Willcox Playa(hydrologic unit)

San Pedro-Willcox(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Cochise

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 015S 022E 36 NW4 Arizona

Comments on the location information

  • 6 KM NE OF THE KEYSTONE MINE. INFO FROM LAND.ST :(1979)

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Molybdenum Tertiary
Tungsten Critical Tertiary

Comments on the commodity information

  • ORE MINED AT SURFACE APPEARS TO HAVE BEEN THOROUGHLY OXIDIZED.

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Molybdenite Ore
Scheelite Ore
Sphalerite Ore
Garnet Gangue

Alteration

  • (Local) Garnetization And Lime Silicates, Oxidation Of Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Texas Canyon
    Rock description Texas Canyon
    Stratigraphic age (youngest) Tertiary
    Chronological age 53
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Abrigo Formation; Martin Formation
    Rock description Abrigo Formation; Martin Formation
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite

Nearby scientific data

(1) -110.05899, 32.09123
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Tertiary Block Faulting Trending Nw ; Reg.Trends: Late Cretaceous Or Early Tertiary N And Nw Trending Folds And Thrust Faults Overriding To Ne
Type of structure Local
Structure description Faults

Ore body information

  • General form BEDDED

Controls for ore emplacement

  • Faults Which Intersect Favorable Beds

Comments on the geologic information

  • GEOL.DESC: MINERALIZATION IN MINE OCCURS NEAR FAULTS IN LIMESTONE BEDS. ORE GRADE MATERIALS ARE IN THIN STREAKS

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1891

Mining district

District name Cochise District

Land status

Ownership category Private

Comments on the production information

  • 25 CARLOADS OF ORE AVERAGING 7.5 PERCENT CU MINED PRIOR TO 1903

Comments on the workings information

  • THE ORE MINED OCCURRED AT THE TOP OF UNIT 1 OF THE MARTIN FORMATION; OPEN PIT WITH INCLINES BELOW; DRILLED BY USBM.

Comments on development

  • DRILLING FOUND ONLY THIN STREAKS OF ORE GRADE. (A) 5 FEET OF 2.2 PCT. CU AND 2.2 ZN (B) 15.8 FEET OF 1.9 PCT CU AND 3.6 ZN (C) 12.7 TO 18.5 FEET OF 0.9 TO 1.3 PCT CU AND 0.6 TO 1.8 PCT ZN. PRODUCTION CEASED 1903

Reference information

Bibliographic references

  • Deposit

    COOPER, J.R., AND SILVER, L.T., 1964, U.S. GEOLOGICAL SURVEY PROF. PAPER 416.

  • Deposit

    COOPER, J.R., 1950, ARIZ. BUREAU OF MINES, GEOL. SER. 18 BULL 156.

  • Deposit

    ROMSLO, T.M., 1949, ARIZ. BUREAU OF MINES REPT. INV. 4504.

  • Deposit

    LIVINGSTON, MAUGER, BENNETT, AND LAUGHLIN, 1967, JGR, V. 72, P. 1361-1375.

  • Deposit

    KEITH, 1973, ABM BULL 187.

  • Deposit

    ROMSLO, T.M. 1949, INVESTIGATION OF KEYSTONE AND ST. GEORGE COPPER ZINC DEPOSITS, COCHISE COUNTY, ARIZONA: U.S. BUREAU OF MINES REPORT OF INVESTIGATION 4504, 21 P.

  • Deposit

    1947 DIREXPL U.S. BUREAU MINES, EXPLORATORY HOLES DRILLED

  • Deposit

    1964 GEOLMAP U.S. GEOLOGICAL SURVEY, COOPER AND SILVER, PROF. PAPER 416

  • Production

    COOPER AND SILVER, 1964

General comments

Subject category Comment text
Deposit PERHAPS 2 TO 5 FEET OF BEDS WERE MINED NEAR SURFACE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1972 Bergquist, Joel 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.