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Last Chance Mine

Producer in Pinal county in Arizona, United States with commodities Copper, 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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10088909
MRDS ID M899896
Record type Site
Current site name Last Chance Mine
Alternate or previous names Ferguson, Owens, Last Chance #2, Ebeling Copper
Related records 10210854

Geographic coordinates

Geographic coordinates: -111.07041, 32.69038 (WGS84)
Elevation 911
Location accuracy 100(meters)
Relative position 3 MILES EAST OF NORTHERN MOST SUIZO MOUNTAIN, ELEVATION 3119, Main Claim Includes A Well, Location Of Well Used

Site location context

Political divisions (FIPS codes)

Pinal(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chief Butte(quadrangle 1:24,000 scale)

Casa Grande(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Gila(hydrologic unit)

Middle Gila(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Pinal

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 008S 012E 35 NE OF SE Arizona

Comments on the location information

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

Commodities

Commodity Importance
Copper Primary
Silver Secondary

Materials information

Materials Type of material
Chalcocite Ore
Malachite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Pinal Schist
    Rock description Pinal Schist

Nearby scientific data

(1) -111.07041, 32.69038
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Andesite Is Surrounded By Pinal Schist

Controls for ore emplacement

  • Fractures Within Andesite

Comments on the geologic information

  • DMEA FILES REPORTED PREC GRANITE-GRANODIORITE AS THE HOST ROCK.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1929
Year of last production 1939

Mining district

District name Owl Head District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Ferguson, Mrs. Ethel
    First year 1943

Workings at the site

  • Type of workings Surface
    Overall depth 6.1M

Comments on the workings information

  • 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

Comments on development

  • 60 CLAIMS. 250 FT DRILL HOLE IS NOW WELL, OTHER DRILLING REPORTED, INCLUDING CHURN DRILLING, 1918. OPERATORS INCLUDED J.J. OWENS

Reference information

Bibliographic references

  • Deposit

    USGS MISCELLANEOUS FIELD STUDIES MAP MF 864

  • Deposit

    ARIZONA DEPARTMENT OF MINERAL RESOURCES FERGUSON COPPER AND LAST CHANCE 2 FILES

  • Deposit

    ABGMT-USBM PRODUCTION DATA FILES

  • Other Database

    DMEA

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit ORE IN FRACTURES AND IN AREAS OF HOST ANDESITE, WITH SECONDARY OXIDATION COMMON
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

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-82 Gest, Don E. Arizona Bureau of Geology and Mineral Technology

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.