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Cochise

Prospect in Cochise county in Arizona, United States with commodity 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. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Mineral rights holdings
  16. Land status
  17. Ownership information
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10282707
MRDS ID TC40403
MAS/MILS ID 0040030086
Record type Deposit
Current site name Cochise
Alternate or previous names Dubacher Canyon, Dubacher Canyon-B Hill-Jones Hill, Muheim-Anderson, Msha.Dbf # 0201656, Msha Name: Copper Queen Branch
Included sites Bisbee

Comments on the site identification

  • ******SEE Copper Queen Mine-Deposit ID 10046248
    Lavender Pit-Deposit ID 10046238
    Sacramento Mine-Deposit ID 10046235

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -109.90755, 31.44044 (WGS84)
Elevation 1645

Site location context

Political divisions (FIPS codes)

Cochise(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bisbee(quadrangle 1:24,000 scale)

Douglas(quadrangle 1:100,000 scale)

Douglas(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Whitewater Draw(hydrologic unit)

Rio De Bavispe(hydrologic accounting unit)

Sonora(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 023 S 024 E 09 Arizona

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcocite Ore
Copper Ore
Tenorite Ore
Cuprite Ore
Delafossite Ore

Alteration

  • (Local) Silicification, Pyritization, Oxidation

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock type qualifier quartz-sericite
    Rock unit name Pinal Schists
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid
    Rock unit name Sacramento Quartz Porphyry
    Stratigraphic age (youngest) Middle Jurassic

Nearby scientific data

Ore Body (1) -109.90755, 31.44044
ListMap

Economic information

Ore body information

  • General form supergene chalcocite blanket
    Area 65HA
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 DISSEMINATED
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin OXIDATION
    Primary Ore Control IGNEOUS
    Secondary Ore Control LITHOLOGY
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 PYRITIZATION
    Total Surface Area (HA) 65.0
    Date of Last Modification 910905

Comments on the geologic information

  • DELAFOSSITE AND MELANOCHALCITE ARE ALSO PRESENT.

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1987
Mining method Open Pit
Milling method Leach-Solvent-Extract-Electrowin

Mining district

District name Warren

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights State Lease

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Private Landowners
    Year 1977
  • Type Owner-Operator
    Owner Phelps Dodge Corp
    Home office Arizona
    Year 1977
  • Type Owner-Operator
    Owner FREEPORT-MCMORAN COPPER AND GOLD INC
    Home office FREEPORT-MCMORAN COPPER AND GOLD INC\nOne North Central Avenue\nPhoenix AZ 85004 \nUnited States

Reserves and resources

  • Type In-situ
    Estimate year 2008
    Total endowment 346600000mt ore
    Remarks Bisbee deposit total endowment as reported by Singer, 2008 in PorCuEX2008.xls. This works out to 2.3 million tons Cu metal, an amount that is in conflict with reported Lavender pit production of 3.8 million mt Cu metal (see 10046238), not to mention Copper Queen and Sacramento.
    Commodity Subtype Grade units Group Importance Year
    Copper 0.656 wt-pct Copper Primary 2008
  • Type Leaching
    Estimate year 1997
    Reserves 210000000mt ore
    Remarks Leach Material
    Commodity Subtype Grade units Group Importance Year
    Copper 0.4 wt-pct Copper Primary 1997
  • Type In-situ
    Estimate year 1994
    Demonstrated 191000000mt ore
    Total resources 191000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.4 wt-pct Copper Major 1994
  • Type In-situ
    Name leaching material
    Estimate year 2009
    Demonstrated 301000000mt ore
    Remarks Freeport-McMoRan 10-K for 2009, p. 40\nhttp://www.fcx.com/ir/downloads/FCX_2009Form_10-K.pdf
    Commodity Subtype Grade units Group Importance Year
    Copper leaching material 0.44 wt-pct Copper Primary 2009
  • Type In-situ
    Estimate year 1995
    Demonstrated 190000000mt ore
    Total resources 190000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.4 wt-pct Copper Major 1995
  • Type In-situ
    Estimate year 1996
    Demonstrated 191000000mt ore
    Total resources 191000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.4 wt-pct Copper Major 1996

Comments on the reserve resource information

  • OTHER NAMES:B-HILL;HILL JONES. RESERVES FROM PHELPS DODGE SEC FM-10K REPT. P. 14. GRADE REPORTED AS ACID-SOLUBLE
  • THE TONNAGES IN MATRIX 1 INCLUDE OXIDE AND SULFIDE ORE AS A MIXED ORE. THE QUANTITY IN MATRIX 2 WAS CALCULATED BY ASSUMING THAT THE LOW GRADE RESOURCE WOULD BE MINED FOR THE SAME LENGTH OF TIME AS THE HIGH GRADE LEACH MATERIAL OR (10,000MTPD) (10 YRS)(357DAYS/YR)=35,700,000 METRIC TONS. WASTE TONNAGE (LOW GRADE CU) DUMP LEACHED HIGH GRADE LEACH MATERIAL

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 0
    Avg. Bench Height (meters) 15
    Capacity 5000
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.95
    Units of Production $/MT ORE
    Operating Days per Year 357
    Operating Shifts per Day 3
    Year of Information 1978
  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 0
    Capacity 10000
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.95
    Units of Production $/MT ORE
    Operating Days per Year 357
    Operating Shifts per Day 3
    Year of Information 1978

Reference information

Bibliographic references

  • Geology

    SOME ARIZONA ORE DEPOSITS, U. OF ARIZ. BULL., ARIZ. BUMINES,VOL.IX NO.4, OCT.1,1938, GEOL. SERIES NO.12, BULL.NO.145.

  • Deposit

    Bryant, D.G., Metz, H.E., 1966, Geology and ore deposits of the Warren mining district: in Titley, S.R., Hicks, C.L., 1966 Geology of the Porphyry Copper Deposits, Southwestern North America University of Arizona Press, Tucson, pp 189-203

  • Geology

    The Porter GeoConsultancy webpage for Cochise contains a description of the geology. Accessed 8/26/2010
    http://www.portergeo.com.au

  • Deposit

    Titley, S.R., 1996, Alteration of mineralized carbonate rocks in the epicrustal environment: in Porphyry Related Copper and Gold Deposits of the Asia Pacific Region, Conf Proc, Cairns, 12-13 Aug, 1996, AMF, Adelaide, pp 3.1 - 3.10

  • Geology

    TRANSACTIONS OF AIME, VOL.IV, CONTAINING PAPERS AND DISCUSSIONS OF THE ARIZ. MEETING SEPT., 1916, PUBLISHED 1917, PP. 302-303.

  • Reserve-Resource

    OXYMIN TERMINATES BISBEE EXPLORATION PROJECT,PAYDIRT,3/28/77

  • Reserve-Resource

    PHELPS DODGE CORP. SEC FM-10K REPT. 12/31/93, P. 14.

  • Reserve-Resource

    PHELPS DODGE CORP., 1994 10-K, P.14.

  • Reserve-Resource

    PHELPS DODGE CORP., 1995 ANNUAL REPORT. P.23.

  • Deposit

    SKILLINGS MINING REVIEW. US COPPER RESOURCE OPPORTUNITIES.NOV. 30, 1991. PP. 6,7.

General comments

Subject category Comment text
Deposit PROPERTY COULD BE MSHA.DBF # 0201656/PHELPS DODGE CORP. (3/95). AS OF 3/28/77 OXYMIN HAD TERMINATED ITS EXPLORATION PROGRAM IN DUBACHER CANYON. THE RECOVERY GIVEN IN THE YIELD SET IS THE PRODUCT OF 0.88 (SX RECOVERY) X 0.98 (ELECTROWINNING RECOVERY) X 0.46 (LEACHING RECOVERY) = 40% (OVERALL RECOVERY)
Deposit The Cochise deposit is a supergene chalcocite blanket.
http://www.portergeo.com.au

Reporter information

Type Date Name Affiliation Comment
Reporter 02-OCT-96 BJR U.S. Bureau of Mines

Beyond USGS

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

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Phelps Dodge Corp — acquired by Subsidiary of Freeport-McMoRan (2007)
    Acquired by Freeport-McMoRan Copper & Gold in 2007 in what was then the largest mining-industry deal ever (~US$26 B).

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

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.