1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Old Chief Mine

Occurrence 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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10039963
MRDS ID M051179
Record type Site
Current site name Old Chief Mine

Geographic coordinates

Geographic coordinates: -111.06402, 32.62204 (WGS84)

Site location context

Political divisions (FIPS codes)

Pinal(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tortolita Mountains(quadrangle 1:24,000 scale)

Casa Grande(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Santa Cruz(hydrologic unit)

Santa Cruz(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 009S 012E 25 Arizona

Comments on the location information

  • INFO FROM LAND.ST :(1964)

Commodities

Commodity Importance
Copper Primary
Silver Primary

Materials information

Materials Type of material
Bornite Ore
Chrysocolla Ore
Malachite Ore

Alteration

  • (Local) Propylitic

Analytical data

Result ASSAY REPORT FOR WILLIAM EWING (2-3-72) OF 5 UNSPECIFIED ORE SAMPLES GAVE 1.6 TO 7.2% CU, 1.7 TO 21.5 OZ PER TON AU (ON 2 OF THE 5 SAMPLES)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)

Nearby scientific data

(1) -111.06402, 32.62204
ListMap

Economic information

Controls for ore emplacement

  • Fault?

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Owl Head District

Land status

Ownership category Private

Comments on the workings information

  • MAIN SHAFT HAS GREATER THAN 25,000 CUBIC FEET OF MATERIAL

Reference information

Bibliographic references

  • Deposit

    N.G. BANKS, FIELD EXAM

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit NO OBVIOUS MINERALIZATION AT SURFACE OF MAIN SHAFT. CHRYSOCOLLA IN OUTCROP ON THE PROSPECT PIT TO THE NW WITH MORE CHALCOPYRITE-LIKE GOSSAN. BORNITE IN VEINS CUTTING VOLCANIC-LOOKING MATERIAL.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1976 Banks, Norman G. 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.