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Lady Loretta

Producer in Queensland, Australia with commodities 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 10158641
MAS/MILS ID 6020350011
Record type Site
Current site name Lady Loretta

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 139.0489, -19.7635 (WGS84)
Elevation 350

Site location context

Political divisions (FIPS codes)

Queensland(province)

Australia(country)

Australia(continent)

Land(continent)

Geographic areas

Country State
Australia Queensland

Commodities

Commodity Importance
Lead Secondary
Silver Secondary
Zinc Critical Primary

Materials information

Materials Type of material
Chalcopyrite Unknown
Galena Unknown
Pyrite Unknown
Sphalerite Unknown
Tetrahedrite Unknown

Nearby scientific data

Ore Body (1) 139.0489, -19.7635
ListMap

Economic information

Ore body information

  • Length 720M
    Width 41M
    Depth to top 460M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 UNKNOWN
    Type of Orebody #2 MASS SULFIDE
    Shape of Orebody #2 IRREGULAR
    Primary mode of Origin METAMORPHISM
    Primary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Date of Last Modification 830902
  • Thickness 24M
    Length 720M
    Width 41M
    Depth to top 400M
    Field Value
    MAS Matrix # 9
    MAS Column # 5
    Type of Orebody #1 OTHER
    Shape of Orebody #1 MASSIVE
    Primary mode of Origin METAMORPHISM
    Primary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Minimum Depth to Top 350
    Avg. Thick. Unconsol. Mat. 350
    Min. Thick. Unconsol. Mat. 350
    Date of Last Modification 880506

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1968
Mining method Open Stope - Sublevel

Ownership information

  • Type Owner-Operator
    Owner Pancontinental Mining Ltd.
    Interest 51
    Home office Australia
    Year 1989
  • Type Owner
    Owner Outokumpu Oy
    Interest 24
    Home office Finland
    Year 1989
  • Type Owner
    Owner Agip Miniere
    Interest 25
    Home office Italy
    Year 1989

Comments on the production information

  • PA=505MT ZINC/DAY; 221MT LEAD/DAY; 82.5G SILVER/MT/DAY.

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Indicated 8691000mt ore
    Demonstrated 8691000mt ore
    Total resources 8691000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 18.1 wt-pct Zinc Major 1977
    Lead Pb 6.7 wt-pct Lead Minor 1977
    Silver Ag 110 g/mt Silver Minor 1977
    Zinc Zn 14.8 wt-pct Zinc Major 1977
    Lead Pb 6.5 wt-pct Lead Minor 1977
    Silver Ag 95 g/mt Silver Minor 1977

Comments on the reserve resource information

  • DEVELOPING PROSPECT; SINKING OF 4.8M DIAM EXPLORATION SHAFT 470M, U/G BULK SAMPLING, DIAMOND DRILLING IN 1987
  • PAH 3/88 SHOWS 8.696 MT AS OF 1/86
  • ESTIMATED RECOVERABLE RESOURCES CALCULATED BY THE EVALUATOR FOR THE 1988 LEAD/ZINC UPDATE STUDY (86US$). DATA BASED ON BIBLIOGRAPHY REFERENCES ROO1 TO R005, USING A MINE DILUTION OF 15% AND MINE RECOVERY OF 90%, AND BACK CALCULATING INTO THE INSITU RESOURCES AS ESTIMATED IN Q-MATRIX 1 COLUMN 2: PAH USED SAME DATA TO ESTIMATE IN SITU RESOURCES AS IN Q-MATRIX 1, COLUMN 3, AND THE PAH DEPOSIT PROFILE REPORT PAGE 18, SEC. 3 RESERVE AND RESOURCE INFORMATION: COLUMN #3 PAH DATA, BACK CALCULATED USING 9,000,000 MT ORE 15% MINE DILUTION AND 90% MINE RECOVERY. DATA FROM PAH MARCH, 1988 DEPOSIT REPORT, THE TRIP REPORT SECTION: IN SITU ORE RESOURCES ESTIMATED BY MAFO. DATA BASED ON THE PUBLISHED ORE RESERVES IN R-MATRIX RECORD NUMBER 2, AND PAH DATA. USING A MINE DILUTION OF 15% AND MINE RECOVERY OF 90%. THESE RESOURCES WERE USED IN THE 1988 LEAD/ZINC UPDATE STUDY.

Workings at the site

  • Type of workings Underground
    Overall depth 500M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method SUBLEVEL 10-43
    Percent Recovery 85
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Number of Shafts 1
    1st Condition of Workings UNKNOWN
    Capacity 2000
    Capacity Units MT ORE/DAY
    Operating Days per Year 250
    Operating Shifts per Day 3
    Year of Information 1989

Reference information

Bibliographic references

  • Ownership

    MINING JOURNAL 3/24/89, P.239

  • Reserve-Resource

    COLUMN #2: EMJ, NOV,1984, PAGES 117, 118; "IN THE PACIFIC";

  • Reserve-Resource

    ALSO EMJ, NOV, 1985, PP 99, 100: MINING JOURNAL, NOV 1985,

  • Reserve-Resource

    P. 399 "DEVELOPMENT"; "PANCONTINENTAL TO DEVELOPE LADY

  • Reserve-Resource

    LORETTA": INTERNATIONAL MINING", FEB 1986, PP. 48, 49 "THIS

  • Reserve-Resource

    MONTH IN MINING" "PANCONTINENTAL MINING LTD":

  • Reserve-Resource

    COX, R., AND CURTIS, R., 1977, THE DISCOVERY OF THE LADY

  • Reserve-Resource

    LORETTA ZINC, LEAD, SILVER DEPOSIT, NORTHWEST

  • Reserve-Resource

    QUEENSLAND, AUSTRALIA-A GEOCHEMICAL EXPLORATION CASE

  • Reserve-Resource

    HISTORY: JOURNAL OF GEOCHEMICAL EXPLORATION, VOL. 8,

  • Reserve-Resource

    P. 189-202.

  • Reserve-Resource

    LOUDON, A.G., ET.AL., 1975, LADY LORETTA SILVER-LEAD-ZINC

  • Reserve-Resource

    DEPOSIT: ECONOMIC GEOLOGY OF AUSTRALIA AND PAPUA NEW

  • Reserve-Resource

    GUINEA, 1, METALS, AUSTEALIAN INSTITUTE OF MINING AND

  • Reserve-Resource

    METALLURGY, MONOGRAPH SERIES NO. 5, P. 377-382.

  • Reserve-Resource

    AUSTRALIAN MINING YEARBOOK, 1977, P. 15.

  • Reserve-Resource

    AUSTRALIAN MINING, JUNE 1975, P. 18.

  • Deposit

    LOUTHEAN, R. (ED.), 1980, REGISTER OF AUSTRALIAN MINING,

  • Deposit

    1980, ROSS LOUTHEAN PUBLISHING.

  • Deposit

    TRIAKO MINES, N.L., ANNUAL REPORTS 1971-1979.

  • Deposit

    ENGINEERING/MINING JOURNAL, AUGUST 1972.

  • Deposit

    MINING JOURNAL, APRIL 20, 1973, P. 320.

  • Deposit

    MINING MONTHLY, SEPTEMBER 1982, P. 13.

  • Deposit

    ETHERIDGE, M.A., AND LEE, M.F., 1975, MICROSTRUCTURE OF

  • Deposit

    SLATE FROM LADY LORETTA, QUEENSLAND, AUSTRALIA:

  • Deposit

    GEOLOGICAL SOCIETY OF AMERICA BULLETIN, VOL. 86,P.18-22

General comments

Subject category Comment text
Deposit PLANNED PRODUCTION FOR THE FIRST 3 YEARS IS 180000 MT/YEAR.

Reporter information

Type Date Name Affiliation Comment
Reporter 11-OCT-1996 Difrancesco, Carl A. 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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