1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Benambra

Plant in Victoria, Australia with commodities Copper, Gold, Lead, Silver, Zinc
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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. 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. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10232438
MAS/MILS ID 6020500001
Record type Site
Current site name Benambra
Alternate or previous names Wilga, Currawong

Geographic coordinates

Point of reference Claim
Geographic coordinates: 147.89853, -36.94618 (WGS84)
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Victoria(province)

Australia(country)

Australia(continent)

Land(continent)

Geographic areas

Country State
Australia Victoria

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Lead Primary
Silver Secondary
Zinc Critical Primary

Materials information

Materials Type of material
Chalcocite Unknown
Chalcopyrite Unknown
Covellite Unknown
Galena Unknown
Malachite Unknown
Pyrite Unknown
Sphalerite Unknown
Tetrahedrite Unknown

Nearby scientific data

Claim (1) 147.89853, -36.94618
ListMap

Economic information

Ore body information

  • Thickness 15M
    Depth to top 80M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 UNKNOWN
    Shape of Orebody #1 UNKNOWN
    Primary mode of Origin UNKNOWN
    Primary Ore Control IGNEOUS
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Minimum Depth to Top 70
    Date of Last Modification 810813
  • Area 7HA
    Field Value
    Total Surface Area (HA) 7
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1978
Year of first production 1992
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Ownership information

  • Type Owner-Operator
    Owner Denehurst Ltd.
    Interest 50
    Home office Australia
    Year 1994
  • Type Owner
    Owner Macquarie Resources Ltd.
    Interest 50
    Home office Australia
    Year 1994

Comments on the production information

  • A DIAMOND DRILLING EXPLORATION PROJECT WAS CONTINUED BY JOINT VENTURE THROUGH 1980.

Reserves and resources

  • Type In-situ
    Estimate year 1994
    Indicated 490000mt ore
    Demonstrated 490000mt ore
    Total resources 490000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 3.64 wt-pct Zinc Major 1994
    Copper Cu 9.09 wt-pct Copper Major 1994
  • Type In-situ
    Estimate year 1994
    Total resources 2540000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 6.7 wt-pct Zinc Major 1994
    Lead Pb 0.6 wt-pct Lead Major 1994
    Copper Cu 1.5 wt-pct Copper Major 1994
  • Type In-situ
    Estimate year 1994
    Total resources 8840000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 4 wt-pct Zinc Major 1994
    Lead Pb 0.7 wt-pct Lead Major 1994
    Copper Cu 1.9 wt-pct Copper Major 1994
    Silver Ag 38 g/mt Silver Minor 1994
    Gold Au 0.8 g/mt Gold Minor 1994

Comments on the reserve resource information

  • TOTAL FOR BOTH OREBODIES IS 13.52 MILLION MT FROM 88/89 REGISTER OF AUSTRALIAN MINING
  • THE 4,000,000 MT ORE IS FOR THE WIGA DEPOSIT ONLY.

Workings at the site

  • Type of workings Surface
    Area 7HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Percent Waste Rock 81.3
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 45
    Capacity 2000
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 1000
    Unit Production Cost 11.52
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 3
    Year of Information 1980

Comments on the workings information

  • BENAMBRA CLIMATE IS TEMPERATE BUT WITH A SEVERE WINTER. THE WORK FORCE IS AVAILABLE BUT LIMITED.

Reference information

Bibliographic references

  • Geology

    CRU ZINC MONITOR-SEPTEMBER 1996-

  • Deposit

    ALEXANDER, J. AND HATTERSLEY, R. 1980. AUSTRALIAN MINING,

  • Deposit

    MINERALS AND OIL. DAVID ELL PRESS, SYDNEY. P.27.

  • Deposit

    ANON. 1978. MINES REPORT. METAL BULLETIN MONTHLY. DECEMBER

  • Deposit

    P.63.

  • Deposit

    ANON. 1978-79. WESERN MINING CORPORATION HOLDINGS LIMITED.

  • Deposit

    ANNUAL REPORTS AND PROGRESS REPORTS TO THE STOCK EXCHANGE

  • Deposit

    OF SYDNEY.

  • Deposit

    MINING MAGAZINE, AUGUST 1978, P.59.

  • Deposit

    ENGINEERING AND MINING JOURNAL, DECEMBER 1978, P.139.

  • Deposit

    ENGINEERING AND MINING JOURNAL, AUGUST 1978, P.147.

  • Deposit

    ENGINEERING AND MINING JOURNAL, APRIL 1979.

  • Deposit

    ENGINEERING AND MINING JOURNAL, 1/81, P. 152.

  • Deposit

    WORLD MINING, 6/79, P. 95.

  • Deposit

    MINING JOURNAL, 9/26/86, P. 223.

  • Deposit

    MINING JOURNAL, 8/26/88, P. 161.

  • Deposit

    MINER, 7/89, P. 9.

  • Deposit

    MINING JOURNAL, LONDON, 5/15/92, P. 9.

  • Deposit

    METALS WEEKLY, 4/31/92, P. 6.

  • Deposit

    MINING JOURNAL, 5/1/92, P. 317.

  • Deposit

    REGISTER OF AUSTRALIAN MINING, 1994/95, P. 221.

  • Deposit

    AUSTRALIAN MINING, 3/94, P. 28, 29.

General comments

Subject category Comment text
Deposit AS OF TIME OF THIS STUDY LITTLE GEOLOGIC AND DIMENSIONAL AND MINERALOGY INFO AVAILABLE ON THE PROPERTY. THUS, MANY ASSUMPTIONS MADE AND STUDY IS A ROUGH APPROXIMATION AT BEST. PROSPECT IS LOCATED WITHIN A LARGE AREA THAT COULD BECOME PART OF THE KOSCZUSKO NATIONAL PARK AND MINE DEVELOPMENT COULD ENCOUNTER STRONG OPOSITION. HEAD GRADE INCREASED FROM 5.5 TO 10.3%. MINE CLOSED IN JULY OF 1996 DUE TO LOW METAL PRICES AND POOR METALLURGICAL PERFORMANCE.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-MAR-97 Jds / Golder 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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