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San Juan Mine

Past Producer in Graham county in Arizona, United States with commodities Copper, Silver, Gold, Molybdenum
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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. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Workings at the site
  22. Links to other databases
  23. Bibliographic references
  24. Reporter information

Geologic information

Identification information

Deposit ID 10027008
MRDS ID M001705
Record type Deposit
Current site name San Juan Mine
Alternate or previous names Peacock

Comments on the site identification

  • ******SEE Associated Deposits: Dos Pobres Mine- Deposit ID 10096999
    Lone Star- Deposit ID 10209543
    Sanchez Copper Deposit- Deposit ID 10026888
    Safford Mine- Deposit ID 10400314
    Safford Deposit- Deposit ID 10027031

Geographic coordinates

Geographic coordinates: -109.65288, 32.94593 (WGS84)
Elevation 1268
Relative position 8.5 MI. NE OF SAFFORD.

Site location context

Political divisions (FIPS codes)

Graham(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Weber Peak(quadrangle 1:24,000 scale)

Safford(quadrangle 1:100,000 scale)

Silver City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Gila-San Carlos Reservoir(hydrologic unit)

Upper Gila(hydrologic accounting unit)

Upper Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Graham

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 006S;005S 026E;026E 02;35 Arizona

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Gold Secondary
Molybdenum Tertiary

Materials information

Materials Type of material
Antlerite Ore
Brochantite Ore
Chalcocite Ore
Chalcopyrite Ore
Chrysocolla Ore
Cuprite Ore
Malachite Ore
Molybdenite Ore
Tenorite Ore
Chlorite Gangue
Epidote Gangue
Hematite Gangue
Jarosite Gangue
Limonite Gangue
Magnetite Gangue
Pyrite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Potassic, Phyllic, Argillic, And Propylitic In Zones Out From Stock

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4
Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name San Juan Stock
    Rock description San Juan Stock
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -109.65288, 32.94593
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description San Juan Shear Zone 3000 Ft Wide, 9-10,000 Ft Long, Strike N50-65e And Intersecting Shears

Ore body information

  • General form IRREGULAR

Controls for ore emplacement

  • Ore In Veins And Fractures In Quartz Monzonite Porphyry With Some Disseminated Sulfides

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant Yes

Mining district

District name Lone Star District (Safford, San Juan)

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Gila Mountain Copper Co. ), San Juan Copper Co. (-, Atlas Copper Co.
    First year 1909
    Last year 1917
  • Type Owner
    Owner Gila Valley Copper Co. (-, Federal Mining Co. , Gila Valley Copper Co. 1909
    First year 1905
    Last year 1905

Production statistics

  • Year 1976
    Period 1973-1976
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Copper Copper 1982mt

Reserves and resources

  • Type Leaching
    Estimate year 1997
    Total resources 270000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.28 wt-pct Copper Primary 1997
  • Type Leaching
    Estimate year 1996
    Total resources 270000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold 1.371 g/mt Gold Secondary 1996
    Silver 6.857 g/mt Silver Secondary 1996
    Copper 0.28 wt-pct Copper Primary 1996
  • Type Leaching
    Estimate year 1995
    Total resources 270000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.28 wt-pct Copper Primary 1995
  • Type Leaching
    Estimate year 1994
    Total resources 270000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.28 wt-pct Copper Primary 1994
  • Type In-situ
    Estimate year 1993
    Total resources 14500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.35 wt-pct Copper Primary 1993
  • Type In-situ
    Estimate year 1975
    Total resources 9070000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.5 wt-pct Copper Major 1975
  • Type In-situ
    Estimate year 1976
    Total resources 21000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.2 wt-pct Copper Major 1976

Workings at the site

  • Type of workings Underground
    Length 152.4M
    Overall depth 129.54M

Comments on the workings information

  • Development Includes 130, 325, And 425 Ft Shafts And 90, 100, And 300 Ft Tunnels.

Comments on development

  • A 50 Tpd Concentration Mill Built On San Juan Claim 1906 By Gila Valley Copper Co. Began Shipping Concentrates To Old Dominion Smelter At Globe In 1906. Late Acquisition By Major Mining Co. (Phelps Dodge, 1992) Due To Difficulties In Dealing With Property Owners.

Reference information

Bibliographic references

  • Geology

    The Porter GeoConsultancy webpage for Dos Pobres, Safford contains a description of the geology as of 8/4/2010.
    http://www.portergeo.com.au/

  • Deposit

    Greeley, 1978, Az. Dept. Min. Res., Spec. Rept. No 2, P. 83-87.

  • Development

    Metals Economics Group (MEG) Safford webpage contains information about the San Juan deposit as of 8/4/2010.
    http://www.metalseconomics.com/

  • Deposit

    Horsnail, 1978, Jour. Geochem. Expl., V. 9, Nos. 2-3, P. 241-243.

  • Deposit

    Blake, 1971, M.S. Thesis, Univ. Of Az., 85 P.

  • Deposit

    Dunn, 1978, Az. Geol. Soc. Digest, V. 11, P. 9-15.

  • Deposit

    Robinson, R.F., And Cook, A., 1966, Safford Copper Deposit, Lone Star Mining District, Graham Co., Arizona, In Titley, S.R. And Hicks, C., Geology Of The Porphyry Copper Deposits, Southwestern North America: Tucson, University Of Arizona Press, P. 251-266.

  • Other Database

    Cimri

  • Production

    Abm File Data

  • Reserve-Resource

    Greeley, 1978, P.87; Keith, Unpub. Data Abm; Robinson And Cook, 1966.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-83 Peterson, Jocelyn A. U.S. Geological Survey
Updater 01-DEC-94 Long, Keith R. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

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.