Dos Pobres Mine

Unknown in Graham county in Arizona, United States with commodities Copper, Molybdenum, Silver, Gold

Geologic information

Identification information

Deposit ID 10096999
MRDS ID M001628
Record type Deposit
Current site name Dos Pobres Mine
Alternate or previous names Los Pobres, Safford Phelps Dodge, Safford

Comments on the site identification

  • *******SEE Associated Deposits: San Juan Mine- Deposit ID 10027008 Lone Star- Deposit ID 10209543 Sanchez Copper Deposit- Deposit ID 10026888 Safford Deposit- Deposit ID 10027031 Safford Mine- Deposit ID 10400314

Geographic coordinates

Geographic coordinates: -109.67455, 32.96149 (WGS84)
Elevation 1244
Relative position 9 MILES N OF SAFFORD.
(click for info)

Geographic areas

Country State County
United States Arizona Graham

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 005N 026E 27,28 Arizona

Commodities

Commodity Importance
Copper Primary
Molybdenum Secondary
Silver Tertiary
Gold Secondary

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Chrysocolla Ore
Molybdenite Ore
Pyrite Ore

Alteration

  • (Local) Hydrothermal, Oxidation

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Chronological age 58
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Chronological age 58
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Chronological age 58
    Stratigraphic age (youngest) Eocene

Nearby scientific data

(1) -109.67455, 32.96149

Geologic structures

Type of structure Local
Structure description Nw Striking Butte Fault

Ore body information

  • General form IRREGULAR AND MASSIVE
    Thickness 114M
    Depth to top 740M
    Length 1200M

Controls for ore emplacement

  • Ne Fractures And Dikes

Economic information

Economic information about the deposit and operations

Operation type Surface-Underground
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1957
Mining method Combined Methods

Mining district

District name Lone Star District (Safford, Dos Pobres)

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Freeport-McMoran Copper and Gold Inc.
    Home office Phoenix, AZ 85004
    Year 2007
    First year 2007
  • Type Owner
    Owner Phelps Dodge Corp. )
    First year 1960

Reserves and resources

  • Type In-situ
    Estimate year 1976
    Total resources 1,355,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.2 wt-pct Copper Major 1976
  • Type In-situ
    Estimate year 1976
    Total resources 105,034,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.89 wt-pct Copper Major 1976
  • Type In-situ
    Estimate year 1977
    Total resources 181,405,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.72 wt-pct Copper Major 1977
    Silver Ag 0.282 g/mt Silver Trace 1977
  • Type In-situ
    Estimate year 1978
    Total resources 400,000,000mt ore
    Remarks (Gilmour,1982, Tooker, 1991)
    Commodity Subtype Grade units Group Importance Year
    Copper 0.72 wt-pct Copper Primary 1978
    Gold 0.38 g/mt Gold Secondary 1978
    Silver 1 g/mt Silver Tertiary 1978
  • Type In-situ
    Estimate year 1980
    Total resources 725,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.6 wt-pct Copper Major 1980
  • Type In-situ
    Estimate year 1990
    Reserves 230,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.89 wt-pct Copper Primary 1990
  • Type In-situ
    Estimate year 1991
    Reserves 230,000,000mt ore
    Remarks Sulfide ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.89 wt-pct Copper Primary 1991
  • Type Leaching
    Estimate year 1991
    Reserves 150,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.48 wt-pct Copper Primary 1991
  • Type In-situ
    Estimate year 1992
    Reserves 230,000,000mt ore
    Remarks Sulfide Ore (Am Mines Handbook,1994)
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.89 wt-pct Copper Major 1992
  • Type Leaching
    Estimate year 1992
    Reserves 270,000,000mt ore
    Remarks Leach Ore (Am Mines Handbook, 1994)
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.46 wt-pct Copper Major 1992
  • Type In-situ
    Name sulfide ore
    Estimate year 1993
    Reserves 230,000,000mt ore
    Remarks Phelps Dodge 1993 10-K http://sec.gov/Archives/edgar/data/78066/0000950147-94-000024.txt
    Commodity Subtype Grade units Group Importance Year
    Copper 0.89 wt-pct Copper Primary 1993
  • Type Leaching
    Name leachable mineralization amenable to open-pit mining
    Estimate year 1993
    Reserves 350,000,000mt ore
    Remarks Phelps Dodge 1993 10-K http://sec.gov/Archives/edgar/data/78066/0000950147-94-000024.txt
    Commodity Subtype Grade units Group Importance Year
    Copper 0.33 wt-pct Copper Primary 1993
  • Type Leaching
    Estimate year 1994
    Total resources 317,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.33 wt-pct Copper Primary 1994
  • Type In-situ
    Estimate year 1994
    Total resources 230,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.89 wt-pct Copper Primary 1994
  • Type In-situ
    Estimate year 1996
    Demonstrated 300,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.65 wt-pct Copper Primary 1996
  • Type In-situ
    Estimate year 1996
    Demonstrated 259,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.39 wt-pct Copper Primary 1996
  • Type In-situ
    Estimate year 1996
    Total resources 559,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.53 wt-pct Copper Primary 1996

Comments on the reserve resource information

  • (4) SULFIDE; (5) LEACHABLE; (6) TOTAL RESOURCE ORE CONTAINS 0.003 TO 0.009% MO.

Workings at the site

  • Type of workings Underground
    Overall depth 762M

Comments on the workings information

  • PROPOSED THAT THIS DEPOSIT BE MINED BY BLOCK CAVING.

Comments on development

  • DISCOVERED EARLY 1950'S BY PROSPECTORS. OPTIONED OCT. 1957 FROM RUSKIN LINES BY PHELPS DODGE. BEGAN DRILLING NOV. 21, 1957 AND EXERCISED OPTION TO PURCHASE IN 1960. BEGAN SHAFT SINKING AND UNDERGROUND DEVELOPMENT NOV. 1968. BY JULY 1979 HAD DRILLED 189,000 FT ROTARY AND DIAMOND DRILL HOLES AND DEVELOPED 79,000 FT SHAFTS, DRIFTS, AND CROSS-CUTS. UNDERGROUND DEVELOPMENT SUSPENDED 1982 AND WORKINGS ALLOWED TO FLOOD IN AUG. 1984. BY 1991 DRILLING AND DEVELOPMENT WORK HAD RESUMED.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M001628 MRDS dep_id 10282581
USGS Mineral Resources Data System MRDS M030455

Bibliographic references

  • Deposit

    GREELEY, 1978, AZ. DEPT. MIN. RES., SPEC. REPT. NO. 2.

  • Development

    Metals Economics Group (MEG) Safford webpage contains historical information on Don Pobres as of 8/3/2010. http://www.metalseconomics.com/

  • Geology

    Langton J M, Williams S A 1982 - Structural, petrological and mineralogical controls for the Dos Pobres orebody, Lone Star Mining District, Graham County, Arizona: in Titley S R 1983 Advances in Geology of the Porphyry Copper Deposits, Southwestern North America University of Arizona Press, Tucson pp 335-352

  • Deposit

    WORLD MINING, V. 29, NO. 4.

  • Geology

    The Dos Pobres geology and reserves are described at portergeo.com as of 8/3/2010. http://www.portergeo.com.au/

  • Deposit

    DUNN, 1978, AZ. GEOL. SOC. DIGEST V. 11, P. 9-15.

  • 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 STATES BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

  • Other Database

    CIMRI

  • Deposit

    ROBINSON, R.F. AND COOK, A.,1966, THE SAFFORD COPPER DEPOSIT, LONE STAR MINING DISTRICT, GRAHAM COUNTY, ARIZONA, IN: GEOLOGY OF THE PORPHYRY COPPER DEPOSITS Southwestern North America, EDITED BY TITLEY, S.R AND HICKS, C.L. THE UNIVERSITY OF ARIZONA PRESS, TUCSON, ARIZ., P. 251-266

  • Reserve-Resource

    GREELEY, 1978, P. 86; KEITH, UNPUB. DATA ABM; SAWYER AND OTHERS, 1992; (4,5) PHELPS DODGE 1992 FORM 10K; (6) PHELPS DODGE 1980 FORM 10K

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