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Cobar

Producer in New South Wales, Australia with commodities Copper, Zinc, Lead, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  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. Ownership information
  16. Production statistics
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10073046
MRDS ID W018852
Record type Site
Current site name Cobar
Alternate or previous names Csa, Chesney Mine

Geographic coordinates

Geographic coordinates: 145.84865, -31.52961 (WGS84)
Relative position 11 KM N. OF TOWN OF COBAR (C.S.A.). CHESNEY MINE IS 3 KM SE OF COBAR. ABOUT 725 KM WNW OF SIDNEY.

Site location context

Political divisions (FIPS codes)

New South Wales(province)

Australia(country)

Australia(continent)

Land(continent)

Geographic areas

Country State
Australia New South Wales

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Lead Secondary
Silver Secondary

Comments on the commodity information

  • GRADE VARIATIONS AND ORE TYPE CHANGES OCCUR OFTEN AND CAUSE PROBLEMS IN ORE TREATMENT.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Biotite Gangue
Calcite Gangue
Chert Gangue
Chlorite Gangue
Dolomite Gangue
Muscovite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Siderite Gangue
Talc Gangue

Alteration

  • (Local) Wallrock Alteration: Silicification, Chloritization, Biotitization, Albitization, Pyritization, Carbonatization And Sericitization.

Analytical data

Result COPPER - ZINC ORE: 0.5 TO 1.3% CU, 0.5 TO 4.5% PB, 2.5 TO 12.5% ZN, 34 TO 51 G/MT AG. COPPER ORE: UP TO 3.5% CU, LESS THAN 0.5% PB OR ZN, LESS THAN 34 G/MT AG.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Great Cobar Slate;C.S.A. Siltstone;Chesney Greywacke
    Rock description Great Cobar Slate;C.S.A. Siltstone;Chesney Greywacke
    Stratigraphic age (youngest) Late Silurian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone

Nearby scientific data

(1) 145.84865, -31.52961
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Major North Trending Anticline. Mines On West Limb.
Type of structure Local
Structure description Numerous Subhorizontal, Open Joints. Numerous Flat, Westerly Dipping Strike Faults (Reverse)

Ore body information

  • General form LENTICULAR

Controls for ore emplacement

  • Shearing And Crenulation Folding

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1871
Year of first production 1905

Mining district

District name Central Area

Ownership information

  • Type Owner-Operator
    Owner Cobar Mines Pty Ltd

Production statistics

  • Year 1920
    Period 1905-1920
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^3.78 % Cu, 2.76 % Pb, 28.1 G Ag/Mt, 0.43 G Au/Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
    Ore Silver Silver 28g/mt
    Major Ore Lead Lead 3wt-pct
    Ore Copper Copper 4wt-pct
  • Year 1968
    Period 1964-1968
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^2.17 % Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Copper Copper 2wt-pct
  • Year 1968
    Period 1964-1968
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^1.34 % Cu, 1.69 % Pb, 4.49 % Zn, 30.5 G Ag/Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Silver Silver 31g/mt
    Major Ore Zinc Zinc 4wt-pct
    Major Ore Lead Lead 2wt-pct
    Ore Copper Copper 1wt-pct

Comments on the production information

  • ITEMS 1, 2, 3, 4, 9 AND 10 APPLY TO C.S.A. MINE ONLY. ITEMS 8 AND 11 TO 15 APPLY TO ALL COBAR AREA MINES. ITEM 8 IS DUPLICATED IN ITEMS 11 TO 15.

Reserves and resources

  • Type In-situ
    Estimate year 1974
    Total resources 30000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.55 wt-pct Copper Major 1974
    Zinc Zn 1.08 wt-pct Zinc Major 1974
    Lead Pb 0.28 wt-pct Lead Minor 1974

Comments on the reserve resource information

  • TO 914 M. DEPTH, C.S.A. AND CHESNEY. GRADE BASED ON 1975 PRODUCTION
  • GRADE BASED ON 1975 PRODUCTION. RESERVES TO 914 M. DEPTH, C.S.A. AND CHESNEY

Workings at the site

  • Type of workings Underground
    Overall depth 530M

Comments on the workings information

  • DEEPEST LEVEL AT C.S.A. IN 1968 WAS 530 M.

Comments on development

  • PRODUCTIVE PERIODS 1905 - 1920, 1937 - 1950, 1964-. ; MILL.CAP: 913 MET TONS ; ECON.YEAR: 1974 ; ECON.COM: 2500 MTPD MILL

Reference information

Bibliographic references

  • Deposit

    KAPPELLE, K., 1970, GEOLOGY OF THE C.S.A. MINE, COBAR, N.S.W.; PROC. AUST. INST. MIN. MET. NO. 233 P. 79 - 94.

  • Deposit

    SUPPEL, D. W. AND STEVENS, B. P. J., 1973, GEOLOGY AND MINERALIZATION AT THE THARSIS MINE WITH A GENERAL REVIEW OF THE COBAR FIELD; REC. GEOL. SURV. N.S.W. V. 15 - 1 P. 169 - 204

  • Production

    MINING MAGAZINE 9-75 P. 159

  • Reserve-Resource

    SKINNER'S MINING INTL. YBK. 1975, P. 169

General comments

Subject category Comment text
Deposit OREBODIES ARE ROUGHLY 9 M WIDE, 180 M LONG, OVER 900 M DEEP. CARROT SHAPED. C.S.A. ORE ZONE IS 180 M WIDE WITHIN WHICH, THE LONGEST ZONE IS 370 M. LONG. PLUNGE NORTH, DIP 80 DEG E.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 Schruben, Paul G. U.S. Geological Survey

Beyond USGS

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

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