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  3. Mineral Resource Data System (MRDS)

Mac Area 'C'

Prospect in Western Australia, Australia with commodity Iron
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C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Reserves and resources
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10280432
MAS/MILS ID 6020550052
Record type Site
Current site name Mac Area 'C'
Alternate or previous names Mac

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 118.76622, -22.99648 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Western Australia(province)

Australia(country)

Australia(continent)

Land(continent)

Geographic areas

Country State
Australia Western Australia

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Chert Unknown
Clay Unknown
Goethite Unknown
Hematite Unknown
Martite Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) 118.76622, -22.99648
ListMap

Economic information

Ore body information

  • Thickness 75M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin RESIDUAL CONCENT
    Primary Ore Control FOLDING
    Date of Last Modification 860602

Comments on the geologic information

  • THE RESERVES KNOWN AS MINING AREA "C" COVER AN AREA OF 2,130 SQ KM AND ARE SITUATED IN THE HAMERSLEY RANGES BETWEEN MT. NEWMAN AND MT. TOM PRICE. THE MARRA MAMBA IRON FORMATION IS THE LOWEST MEMBER OF THE HAMERSLEY GROUP AND PERSISTS THROUGHOUT THE WHOLE OF THE HAMERSLEY IRON PROVINCE. IN GENERAL THE FORMATION CAN BE DESCRIBED AS A CHERTY BANDED IRON FORMATION, WITH A DISTINCT INCREASE IN THE IRON CONTENT IN THE TOP 100 METRES. GENTLE TO MODERATE FOLDING OF THE ROCK UNITS WITHIN THE AREA HAS LED TO THE FORMATION OF ELONGATE EAST-WEST SYN- CLINES AND ANTICLINES, AND THE RESISTANT BANDED IRON FORMATION MEMBERS FORM PROMINENT EAST-WEST TRENDING RANGES ALONG THE LIMBS AND CORES OF THESE FOLD STRUCTURES. THE ORE USUALLY COMPRISES AN UPPER HYDRATED GOETHITIC ZONE, VARYING FROM 5 TO 30 METRES IN THICKNESS, OVERLYING A TYPICAL BANDED HEMATITE/GOETHITE ORE ZONE, THE INDIVIDUAL BANDS NORMALLY VARYING IN THICKNESS FROM 2 MM TO 20 MM. THE GOETHITE IN THE UPPER HYDRATED ZONE IS HIGH IN SILICA AND IS TOUGH, BROWN AND SEMI-TRANSLUCENT, WHEREAS THE GOETHITE IN THE UNALTERED ZONE BENEATH IS SOFTER, MORE POROUS AND OCHREOUS IN NATURE. IN THE UNALTERED ZONE, MARTITE IS ALSO PRESENT IN SIGNIFICANT AMOUNTS IN NARROW VEINS AND POCKETS.

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Significant Yes
Mining method Open Pit

Ownership information

  • Type Operator
    Owner Goldsworthy
    Year 1982
  • Type Owner
    Owner Cgf Iron Pty.
    Interest 47
    Year 1982
  • Type Owner
    Owner Utah Development Co.
    Interest 33
    Year 1982
  • Type Owner
    Owner Black Star Pty.
    Interest 20
    Year 1982

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Indicated 447100000mt ore
    Demonstrated 447100000mt ore
    Total resources 447100000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 61.7 wt-pct Iron Major 1981

Comments on the reserve resource information

  • THE RESERVES CONSIST OF A NUMBER OF SMALL ORE BODIES. THE FOLLOWING IS A BREAKDOWN OF THE RESERVES AND GRADE FOR ORE BODIES A, C AND F: . ORE BODY RESERVE (MT) GRADE (%) . C 245,000,000 62.0 F 101,400,000 61.4 A 100,700,000 61.4 . TOTAL 447,100,000 61.73 .

Workings at the site

  • Type of workings Surface
    Area 34000HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN PIT
    Percent Waste Rock 48
    Capacity 40100
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.81
    Units of Production $/MT ORE
    Operating Days per Year 312
    Operating Shifts per Day 3
    Year of Information 1982

Comments on other economic factors

  • MAC IS CURRENTLY A NONPRODUCING PROPERTY, THE COSTS AND CAPACITIES LISTED HERE ARE ESTIMATED FOR THE YEAR 1987, WHEN THE MINE AND MILL ARE EXPECTED TO BE IN FULL PRODUCTION.
  • THE BROCKMAN IRON FORMATION IN THIS AREA HAS RELATIVELY HIGH PHOSPHORUS CONTENT AND THEREFORE IS NOT WELL SUITED FOR MINING. MINING WILL BE FROM THE MARRA MAMBA IRON FORMATION WHICH HAS LOWER PHOSPHORUS CONTENT.

Reference information

Bibliographic references

  • Deposit

    GOLDSWORTHY MINING LTD, BRIEF DESCRIPTION OF EXISTING

  • Deposit

    FACILITIES AND FUTURE PLANS, 18 P.

  • Deposit

    HANNAFORD, R.H., DOLMAN, K.H., BARRINGTON, R.C., GOLDSWORTH

  • Deposit

    MINING LTD'S AREA "C" PROJECT, PP H(1) - H(11).

Reporter information

Type Date Name Affiliation Comment
Reporter 13-FEB-95 Bolis U.S. Bureau of Mines

Beyond USGS

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

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