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Commonwealth Extension Mine

Past Producer in Cochise county in Arizona, United States with commodities Silver, Gold, Copper
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10046214
MRDS ID M241066
Record type Site
Current site name Commonwealth Extension Mine

Geographic coordinates

Geographic coordinates: -109.80815, 31.90319 (WGS84)
Elevation 1341
Relative position APPROX 1 MI E OF PIERCE; DIRECTLY EAST AND ADJOINING COMMONWEALTH MINE.

Site location context

Political divisions (FIPS codes)

Cochise(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pearce(quadrangle 1:24,000 scale)

Chiricahua Peak(quadrangle 1:100,000 scale)

Douglas(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 018S 025E 04 NW/4 Arizona

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Secondary

Alteration

  • (Local) Silicification

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -109.80815, 31.90319
ListMap

Economic information

Ore body information

  • General form VEINS

Controls for ore emplacement

  • Faulting

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Pearce District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Commonwealth Extension Mining Co

Comments on the production information

  • PRODUCTION INCLUDED UNDER COMMONWEALTH IN ABGMT-USBM FILES

Comments on the workings information

  • SHAFT WORKINGS CONNECTED TO AND EAST OF COMMONWEALTH MINE, SEE COMMONWEALTH FOR COMPLETE DESCRIPTION

Reference information

Bibliographic references

  • Deposit

    KEITH, S.B., 1973, ARIZONA BUREAU OF MINES BULLETIN 187, P. 69.

  • Deposit

    SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: UNITED STATS BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

  • Other Database

    CIMRI

  • Production

    KEITH, 1973.

General comments

Subject category Comment text
Deposit SPOTTY OXIDIZED SILVER-GOLD MINERALIZATION IN FISSURE VEINS AND NARROW REPLACEMENT BODIES IN ALTERED ANDESITE AND RHYOLITE BRECCIA.
Deposit SEE COMMONWEALTH FINE FOR MAJOR PRODUCER ADJOINING COMMONWEALTH EXTENSION ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1980 Zigler, Jan L. 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.