Blanket

Producer in Zimbabwe with commodities Gold, Silver
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. Production statistics
  12. Reserves and resources
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10134910
MAS/MILS ID 7960200031
Record type Site
Current site name Blanket

Geographic coordinates

Geographic coordinates: 28.57829, -20.83017 (WGS84)

Site location context

Political divisions (FIPS codes)

Zimbabwe(country)

Africa(continent)

Land(continent)

Geographic areas

Country
Zimbabwe

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Arsenopyrite Unknown
Gold Unknown
Pyrite Unknown

Nearby scientific data

(1) 28.57829, -20.83017

Economic information

Ore body information

  • Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 IRREGULAR
    Minimum Depth to Top 500
    Date of Last Modification 861215

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Significant Yes
Milling method Hydrometallurgy Unspecified

Ownership information

  • Type Owner-Operator
    Owner Falconbridge Inv. (Zimbabwe) Pty. Ltd.
    Interest 100
    Home office Zimbabwe
    Year 1991

Production statistics

  • Year 1981
    Description Total Kg Silver 1967-1980 414 Kg
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 414000g
  • Year 1981
    Description Au G/Mt Ore 160000 G/Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 160000g/mt
  • Year 1981
    Description Total Kg Gold 1967-1980 10680 Kg
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 10680000g

Reserves and resources

  • Type In-situ
    Estimate year 0
    Indicated 952500mt ore
    Demonstrated 952500mt ore
    Total resources 952500mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4.6 g/mt Gold Major 0
    Silver Ag 0.28 g/mt Silver Minor 0

Comments on the reserve resource information

  • ANALYZED FOR 1983 AVAILABILITY STUDY AT 150,000 MTPY ORE CAPACITY FOR 15,000 OZ AU/YR. 1986 PROD. = 17,000 OZ FROM MILLING 160,000 MT ORE. 1989 PROD. = 15,040 OZ FROM MILLING 158,725 MT ORE. MAY BE UPDATED FOR THE 1992 AU AVAILABILITY STUDY. RESERVES ARE SAME VALUES AS IN OLD 1983 STUDY.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method SUBLEVEL 10-43
    Percent Waste Rock 25
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Capacity 452
    Capacity Units MT ORE/DAY
    Unit Production Cost 23.19
    Units of Production $/MT ORE
    Operating Days per Year 310
    Operating Shifts per Day 2
    Year of Information 1982

Reference information

Bibliographic references

  • Deposit

    ANNUAL REPORT FALCONBRIDGE NICKEL MINES LIMITED, 1980, P 42.

  • Deposit

    BLANKET MINE (PVT.) LTD., MINING ANNUAL REVIEW, 1981,

  • Deposit

    PP 478-479.

  • Deposit

    ZIMBABWE, BLANKET MINES, MINING MAGAZINE, JANUARY, 1982.

  • Deposit

    FOSTER, R.P., MANN, A.G., STOWE, C.W., AND WILSON, J.F.,

  • Deposit

    ARCHEAN GOLD MINERALIZATION IN ZIMBABWE, PREPRINT FOR

  • Deposit

    GEOL. SOC. SOUTH AFRICA, ORE DEPOSITS IN SOUTHERN AFRICA,

  • Deposit

    1982, 88 P.

General comments

Subject category Comment text
Deposit ORE IS CRUSHED AND GROUND FOLLOWED BY GRAVITY SEPARATION, CYANIDATION AND MERRIL-CROWE PRECIPITATION. APPROXIMATELY 6070 OZ CONTAINED AU IS RECOVERED BY THE GRAVITY STEP. THE REMAINING PORTION IS RECOVERED FROM THE CYANIDATION PROCESS.

Reporter information

Type Date Name Affiliation Comment
Reporter 21-OCT-1992 Boyle, Ed U.S. Bureau of Mines

Beyond USGS

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