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Free Coinage Mine

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

Geologic information

Identification information

Deposit ID 10046210
MRDS ID M241060
Record type Site
Current site name Free Coinage Mine
Related records 10160821

Geographic coordinates

Geographic coordinates: -110.10399, 31.70124 (WGS84)
Elevation 1364
Relative position APPROX 2 MI SW OF TOMBSTONE

Site location context

Political divisions (FIPS codes)

Cochise(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tombstone(quadrangle 1:24,000 scale)

Fort Huachuca(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper San Pedro(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 020S 022E 09,16 Arizona

Comments on the location information

  • S CENTRAL SEC 9, N CENTRAL SEC 16, UTM EST, ABOUT 500 FT SOUTH OF MERRIMAC ADITS

Commodities

Commodity Importance
Silver Primary
Gold Primary
Manganese Critical Primary

Alteration

  • (Local) Oxidized And Enriched Gold And Silver Mineralization

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Laramide Quartz-Latite Porphyry
    Rock description Laramide Quartz-Latite Porphyry
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -110.10399, 31.70124
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault Fissure

Ore body information

  • General form SPOTTY

Controls for ore emplacement

  • Fault Fissure

Comments on the geologic information

  • LARAMIDE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1920

Mining district

District name Tombstone District

Land status

Ownership category Private

Comments on the production information

  • ABGMT-USBM PRODUCTION FIGURES INCLUDE AT LEAST SOME DATA FROM MERRIMAC MINE TO NORTH

Comments on the workings information

  • 2 SHAFTS AND SURFACE WORKINGS

Comments on development

  • OPERATORS INCLUDED FREE COINAGE LEASE, G.E. VAUGHN, TOM BRANDT

Reference information

Bibliographic references

  • Deposit

    KEITH, S B, 1973, ARIZONA BUREAU OF MINES BULLETIN 187, P 75.

  • Deposit

    ABM BULL 143, 1938

  • Deposit

    MARVIN, STERN, CREASEY, AND MEHNERT, 1973, USGS BULL 1379

  • Production

    KEITH, 1973, ARIZ BUR OF MINES BULL 187.

General comments

Subject category Comment text
Deposit MINERALIZATION ALONG A FAULT FISSURE IN QUARTZ-LATITE PORPHYRY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1980 Zigler, Jan L. U.S. Geological Survey
Updater 01-NOV-1981 Gest, Don E. 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.