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Johnson Camp

Producer in Cochise county in Arizona, United States with commodities Copper, Molybdenum, 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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10160924
MRDS ID M050007
MAS/MILS ID 0040030042
Record type Site
Current site name Johnson Camp
Alternate or previous names Cyprus Johnson Camp, Copper Chief, Diabase, Burro Pit, Johnson Pit
Related records 10039384, 10112670

Geographic coordinates

Point of reference Trench
Geographic coordinates: -110.06876, 32.10292 (WGS84)
Elevation 1524
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Cochise(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dragoon(quadrangle 1:24,000 scale)

Tucson(quadrangle 1:100,000 scale)

Tucson(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 015 S 022 E 26 SE Arizona

Commodities

Commodity Importance
Copper Primary
Molybdenum Secondary
Silver Secondary

Materials information

Materials Type of material
Azurite Unknown
Chalcopyrite Unknown
Chrysocolla Unknown
Malachite Unknown
Pyrite Unknown

Nearby scientific data

Trench (1) -110.06876, 32.10292
ListMap

Economic information

Ore body information

  • Strike N45W
    Dip 37E
    Thickness 61M
    Length 610M
    Width 200M
    Area 530HA
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 BRECCIA FILL
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 REPLACEMENT
    Primary mode of Origin OXIDATION
    Secondary mode of Origin CONT METASOMATIC
    Primary Ore Control BEDDING
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 SERICITIC
    Strike And Dip N45W:37E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 530
    Future Surface Area (HA) 50
    Previous Surface Area (HA) 480
    Date of Last Modification 830708

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1880
Mining method Open Pit
Year of first production 1975
Milling method Leach-Solvent-Extract-Electrowin

Mining district

District name Johnson Camp

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner-Operator
    Owner Arimetco International, Inc.
    Interest 100
    Home office Arizona
    Year 1991

Comments on the ownership information

  • COMPANY ADDRESS: ARIMETCO INTERNATIONAL INC. 6245 E. BROADWAY BLVD., SUITE 300 TUCSON, AZ 85711

Production statistics

  • Year 1975
    Description Annual Amount Of Copper Produced 2782 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 2782mt 100wt-pct
  • Year 1975
    Description Annual Production - Ore Mined 1551000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1551000mt
  • Year 1976
    Description Annual Production - Ore Mined 1189000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1189000mt
  • Year 1976
    Description Annual Amount Of Copper Produced 4562 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4562mt 100wt-pct
  • Year 1977
    Description Annual Amount Of Copper Produced 4684 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4684mt 100wt-pct
  • Year 1977
    Description Annual Production - Ore Mined 1135000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1135000mt
  • Year 1978
    Description Annual Amount Of Copper Produced 4628 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4628mt 100wt-pct
  • Year 1978
    Description Annual Production - Ore Mined 1018000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1018000mt
  • Year 1979
    Description Annual Production - Ore Mined 1449000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1449000mt
  • Year 1979
    Description Annual Amount Of Copper Produced 4550 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4550mt 100wt-pct
  • Year 1980
    Description Annual Production - Ore Mined 1361000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1361000mt
  • Year 1980
    Description Annual Amount Of Copper Produced 4672 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4672mt 100wt-pct
  • Year 1981
    Description Annual Amount Of Copper Produced 4850 Mt Cathode Copper (99,9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4850mt 100wt-pct
  • Year 1981
    Description Annual Production - Ore Mined 1360000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1360000mt
  • Year 1982
    Description Annual Production - Ore Mined 1719000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1719000mt
  • Year 1982
    Description Annual Amount Of Copper Produced 4401 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4401mt 100wt-pct
  • Year 1983
    Description Annual Prod (Mine Closed In December) 1780000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1780000mt
  • Year 1983
    Description Stockpiled Ore Leached - Mine Closed 4408 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 4408mt 100wt-pct
  • Year 1984
    Description Stockpiled Ore Leached - Mine Closed 3993 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3993mt 100wt-pct
  • Year 1985
    Description Stockpiled Ore Leached - Mine Closed 2800 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 2800mt 100wt-pct
  • Year 1986
    Description Lix Plant Permanently Closed Dec.1986 2210 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 2210mt 100wt-pct
  • Year 1990
    Description Sx/Ew Plant Opens Sept. 1990 1905 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1905mt 100wt-pct
  • Year 1991
    Accuracy Estimate
    Description Mine Reopens Aug. 1991, Est. Production 565800 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 565800mt
  • Year 1991
    Accuracy Estimate
    Description Ann. Amt. Cu Produced, Est. Production 3772 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3772mt 100wt-pct
  • Year 1992
    Description 2360000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 2360000mt
  • Year 1992
    Description 3720 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3720mt 100wt-pct
  • Year 1993
    Description 3360 Mt Cathode Copper (99.9%)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3360mt 100wt-pct
  • Year 1993
    Description 3000000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3000000mt

Comments on the production information

  • PRODUCTION DATA TAKEN FROM BUREAU OF MINES PRODUCTION STATISTICS UP TO 1980. THE 1981 PRODUCTION DATA FROM COMPANY. PRODUCTION DATA FROM PRIMARY COPPER INDUSTRY OF ARIZONA IN YEARS 1982-1985 (SPECIAL REPORTS NOS. 6,8,9, & 10. AZ DEPT OF MINES & MINERAL RESOURCES. 1986 PRODUCTION DATA PROVIDED BY CYPRUS MINERALS AFTER CYPRUS PERMANENTLY CLOSED THE SX/EW PLANT IN 1986, THE COMPANY REMOVED THE PLANT AND TRANSPORTED IT OVER TO THE SIERRITA MINE (SEE SEQ NO 0040190004). IN 1989, ARIMETCO PURCHASED MINE & REMAINING FACILITIES FROM CYPRUS FOR $1,000,000. PRODUCTION DATA FROM 1991-1993 FROM ARIMETCO 1993 ANN. REPT. P. 6.

Reserves and resources

  • Type In-situ
    Estimate year 2008
    Total endowment 250000000mt ore
    Remarks Johnson Camp deposit total endowment. 1.2 million mt contained Cu metal.\nSinger 2008 in PorCuEX2008.xls.\n
    Commodity Subtype Grade units Group Importance Year
    Copper 0.489 wt-pct Copper Primary 2008
    Molybdenum 0.011 wt-pct Molybdenum Secondary 2008
    Silver 1.6 g/mt Silver Secondary 2008
  • Type In-situ
    Estimate year 1994
    Indicated 13600000mt ore
    Demonstrated 13600000mt ore
    Total resources 13600000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.37 wt-pct Copper Major 1994
  • Type In-situ
    Estimate year 1994
    Indicated 8700000mt ore
    Demonstrated 8700000mt ore
    Total resources 8700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.42 wt-pct Copper Major 1994
  • Type In-situ
    Estimate year 1990
    Measured 3180000mt ore
    Demonstrated 3180000mt ore
    Total resources 3180000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.215 wt-pct Copper Major 1990
  • Type In-situ
    Estimate year 1995
    Demonstrated 16500000mt ore
    Total resources 16500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.4 wt-pct Copper Major 1995
  • Type In-situ
    Estimate year 1995
    Demonstrated 18560000mt ore
    Total resources 18560000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.33 wt-pct Copper Major 1995
  • Type In-situ
    Estimate year 1996
    Demonstrated 13000000mt ore
    Total resources 13000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.38 wt-pct Copper Major 1996
  • Type In-situ
    Estimate year 1996
    Demonstrated 17000000mt ore
    Total resources 17000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.3 wt-pct Copper Major 1996
  • Type In-situ
    Estimate year 1996
    Demonstrated 30000000mt ore
    Total resources 30000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.34 wt-pct Copper Major 1996
  • Type In-situ
    Estimate year 1996
    Total resources 31000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.33 wt-pct Copper Major 1996

Comments on the reserve resource information

  • COMPANY ADDRESS: ARIMETCO INTERNATIONAL INC. 6245 E. BROADWAY BLVD., SUITE 300 TUCSON, AZ 85711 M1C1=R1 PROVEN RES OF BURRO PIT - ASSAY IN TERMS OF ACID-SOLUBLE GD. MATRIX 1, COL 1 = RESERVE RECORD 1 M2C1=R2 MATRIX 2, COL 1 = RESERVE REC 2 PROV & PROB RES IS COPPER CHIEF/DIABASE PIT. GD IN TERMS OF ACID-SOLUBLE COPPER. M3C1=R3 MAT 3, COL 1 = RES REC 3 NO. 2 HEAP LEACH PILE; GRADE = ACID-SOLUBLE COPPER M4C1=M1C1+M2C1 MAT 4, COL 1 = MAT 1, COL 1 + MAT 2, COL 1 MAT 4 IS COMBINATION OF BURRO PIT + COPPER CHIEF RESERVES. GRADE GIVEN AS ACID-SOLUBLE COPPER. M9C4=M3C1 MAT 9, COL 4 = MAT 3, COL 1 M9C5=M1C1+M2C1 MAT 9, COL 5 = MAT 1, COL 1 + MAT 2, COL 1 MAT 9 COMBINATION OF BURRO PIT & CU CHIEF/DIABASE PIT RES. 1994 RESERVE A COMBINATION OF THE BURRO PIT AND COPPER CHIEF RESERVES. FROM ARIMETCO INTERNATIONAL INC. 1993 ANN. REPT. P.7. 1994 PRODUCTION: 3.0 MILLION MTS ORE, 1.8 MILLION MTS WASTE TO PRODUCE 3,360 MT CATHODE COPPER (ARIMETCO INT. INC 1993 A R)

Workings at the site

  • Type of workings Surface
    Area 56HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method BENCH (BERM)
    Percent Waste Rock 50
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 12
    Max. Pit Slope (degrees) 45
    Capacity 5440
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 1.29
    Units of Production $/MT ORE
    Operating Days per Year 104
    Operating Shifts per Day 1
    Year of Information 1991
  • Type of workings Surface
    Area 106HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Swell Factor 73.3
    Percent Waste Rock 50
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, GRAVEL
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 12
    Max. Pit Slope (degrees) 45
    Capacity 7110
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 50
    Unit Production Cost 1.2
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 1
    Year of Information 1991

Comments on other economic factors

  • PRODUCTION DATA TAKEN FROM BUREAU OF MINES PRODUCTION STATISTICS UP TO 1980. PRODUCTION DATA 1981 FROM COMPANY. PRODUCTION DATA FROM PRIMARY COPPER INDUSTRY OF ARIZONA IN YEARS 1982-1985 (SPECIAL REPORTS NOS. 6, 8, 9, & 10. AZ DEPT OF MINES & MINERAL RESOURCES. 1986 PRODUCTION DATA PROVIDED BY CYPRUS MINERALS AFTER CYPRUS PERMANENTLY CLOSED THE SX/EW PLANT IN 1986, THE COMPANY REMOVED THE PLANT AND TRANSPORTED IT OVER TO THE SIERRITA MINE (SEE SEQ NO 0040190004). IN 1989, ARIMETCO PURCHASED MINE & REMAINING FACILITIES FROM CYPRUS FOR $1,000,000. PRODUCTION DATA FROM 1991-1993 FROM ARIMETCO 1993 ANN. REPT. P. 6. DURING JAN-JULY, 1991, THE SX PLANT WAS RUNNING 7,192 L/MIN AT A FEED GRADE OF 1.124 G/L CU FROM PREGNANT LEACH SOLUTION OFF OF OLD HEAP PILE. IN AUG 1991, THE SX PLANT (K2) WAS EXPANDED WITH ADDITION OF 2 NEW MIXER-SETTLERS TO ALLOW 2 PARALLEL TRAINS, EACH CONSISTING OF 1 STRIPPER AND 2 EXTRACTORS. FEED RATE WILL INCREASE TO 8,706 L/MIN. WHEN BURRO PIT ORE IS LEACHED. FEED GRADE INCREASES TO 1.4 G/L. LAT-LONG FOR ORIGIN (MINE) PERTAINS TO LOCATION OF COPPER CHIEF/DIABASE PIT. THIS LOCATION USED FOR THIS RECORD, BECAUSE MOST OF MINING ACTIVITY WILL BE AT THAT PIT RATHER THAN BURRO PIT.

Reference information

Bibliographic references

  • Reserve-Resource

    ARIMETCO INT. INC., 1993 ANN. REPT. P. 7.

  • Reserve-Resource

    MINING RECORD, V 106/N 28, 7/12/95, P.15.

  • Reserve-Resource

    ARIMETCO INTERNATIONAL INC. 1995 ANNUAL REPORT, P.5.

  • Deposit

    ARGALL, GEORGE D., JR. AUG 1976, COPPER OXIDES TO COPPER

  • Deposit

    CATHODE - NEW CYPRUS JOHNSON OPERATION. WORLD MINING

  • Deposit

    MAG. V 29, N 9, PP. 48-51

  • Deposit

    CLAYTON, ROBERT L, 1977, ALTERATION AND MINERALIZATION OF CY

  • Deposit

    JOHNSON DEPOSIT. UNPUB. ON FILE WITH JOHNSON CAMP COST DAT

  • Deposit

    BLDG 20, DENVER FEDERAL CENTER, DENVER, CO.

  • Deposit

    COOPER, J R, AND L T SILVER, 1964, GEOLOGY AND ORE DEPOSITS

  • Deposit

    DRAGOON QUADRANGLE, COCHISE CO, AZ. U S GEOLOGICAL SURVEY PROF

  • Deposit

    416.

  • Deposit

    CYPRUS MINES ANNUAL REPT. FOR 1973 (P 11-2), 1975 (P. 12) AN

  • Deposit

    CP 6-7).

  • Deposit

    ION EXCHANGE - THE NEW DIMENSION IN COPPER RECOVERY SYSTEMS

  • Deposit

    1975, ENGINEERING AND MINING JOURNAL, V. 176, N 6, P 100.

  • Deposit

    THE FOLLOWING REFERENCES WERE USED IN DEVELOPING THE

  • Deposit

    1991 EVALUATION

  • Deposit

    ARIMETCO INTERNATIONAL INC. 1990 ANNUAL REPORT, P. 6.

  • Deposit

    WALENGA, KAREN. NEW SX-EW FACILITIES TO START UP BY

  • Deposit

    SEPTEMBER. PAYDIRT MAGAZINE (SW ED), JULY 1990, PP. 4A-6A.

  • Deposit

    THE NORTHERN MINER, 1-14-91, P.6.

  • Deposit

    THE NORTHERN MINER, 8-6-90, P.13.

  • Deposit

    PAY DIRT, 9-89, P.17B.

  • Deposit

    ENGINEERING AND MINING JOURNAL, 2-92, P.C8.

  • Deposit

    THE NORTHERN MINER, 10-11-93, P.14.

  • Deposit

    THE MINING RECORD, 1-12-94, P.3.

  • Deposit

    SW PAY DIRT, 9-94, P.17A.

General comments

Subject category Comment text
Deposit REC 040 PRINCIPAL ENVIRONMENTAL SENSITIVITY IS THE PERMANEN (E-SEN) PLACING OF THE PIT, WASTE DUMPS AND LEACH DUMPS. REC 050 THE OXIDE ORE VEIN WAS EXPOSED ON THE SURFACE AND W (HISTO) ORIGINALLY MINED AS A FLUX FOR THE SMELTER IN DO AZ. REC 060-061 LOWER ABRIGO IS A FISSILE SHALE WITH INTERCALCA (LITHOL) CARBONATE AND QUARTZITE BEDS. SHALE HAS BEEN ALTERED TO A BIOTITE HORNFELS WITH VARIABLE K SPAR, QUARTZ, EPIDOTE, SPHENE, AND CHLORITE. CARBONATE INTERBEDS HAVE BEEN ALTERED TO BAND EPIDOTE, DIOPSIDE, TREMOLITE, AND CALCITE. T MEMBER OF ABRIGO IS THE ORE BEARING HOST ROCK REC 070 PRIMARY MINERALS PYRITE AND CHALCOPYRITE OCCUR AS M (MINER) AMOUNTS IN OXIDE ORE ZONE. REC 080 LOWER MEMBER OF ABRIGO FM. HAS BEEN MASSIVELY FRACT (G-CON) FAULTS. OXIDATION STRATIGRAPHICALLY CONTROLLED CHANNELING OF THE SECONDARY SOLUTIONS DOWN-DIP T MASSIVELY FRACTURED LOWER ABRIGO. CHANNELING CO LED BY OVERLYING TACTIZED BEDS AND MORE IMPORTAN UNDERLYING BOLSA QUARTZITE. REC 601-615 (R-REM) WORLD MIN MAG, AUG 1976, P 48. REC 151 BENEFICIATION RECORD BENEFICIATION PROCESS IS LEACH DUMP USING DRIP TUBES, LIQUID SOLVENT EXCHANGE (LIX) AND ELECTROWINNING THAT PRODUCES MODITY GRADE COPPER (99.99% PURE). ORIGINAL EVALUATION WAS DONE IN 1978. UPDATED IN 1983 & 1991. INFORMATION ABOUT MINE AND LIX PLANT ACQUIRED FROM CYPRUS DURING VISIT TO JOHNSON CAMP IN MAY 1977. 1994 RESERVE A COMBINATION OF THE BURRO PIT AND COPPER CHIEF RESERVES. FROM ARIMETCO INTERNATIONAL INC. 1993 ANN. REPT. P.7. 1994 PRODUCTION: 3.0 MILLION MTS ORE, 1.8 MILLION MTS WASTE TO PRODUCE 3,360 MT CATHODE COPPER (ARIMETCO INT. INC 1993 A R) COPPER CHIEF/DIABASE OREBODY IS LOCATED IMMEDIATELY NORTH OF HEAP LEACH PILES (NW QUARTER, SEC 26, R 22 E, T 15 S, GILA & SALT RIVER MERIDIAN).

Reporter information

Type Date Name Affiliation Comment
Reporter 24-SEP-1996 Hite, Alan G. U.S. Bureau of Mines

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.