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  3. Mineral Resource Data System (MRDS)

South Crofty Pendarves Dist.

Producer in United Kingdom with commodity Tin
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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. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10280100
MAS/MILS ID 4120100041
Record type Site
Current site name South Crofty Pendarves Dist.
Alternate or previous names South Crofty Pendarves Dist

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -5.28108, 50.23236 (WGS84)

Site location context

Political divisions (FIPS codes)

United Kingdom(country)

Europe(continent)

Land(continent)

Geographic areas

Country
United Kingdom

Commodities

Commodity Importance
Tin Critical Primary

Materials information

Materials Type of material
Arsenopyrite Unknown
Cassiterite Unknown
Chalcopyrite Unknown
Wolframite Unknown

Nearby scientific data

Ore Body (1) -5.28108, 50.23236
ListMap

Economic information

Ore body information

  • Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 IRREGULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Degree of Wallrock Alter. UNKNOWN
    Date of Last Modification 861010

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Significant Yes
Mining method Shrinkage Methods - Overhand Shrinkage
Milling method Flotation

Ownership information

  • Type Owner
    Owner Charter Consolidated
    Interest 100
    Year 1983

Comments on the production information

  • A $543.47 SMELTING COST AND A $12.85 MILLING COST PER TONNE ARE INCURRED IN THE PRODUCTION OF PRODUCT A, TIN CONCENTRATE. THE PYRITE/ARSENOPYRITE CONCENTRATES ALSO CONTAIN BASE METAL VALUES BUT THESE ARE NOT ECONOMIC TO RECOVER EITHER AT CURRENT PRICES.

Comments on the reserve resource information

  • THE ONLY OPERATING MINE IN THE UK. THE OTHER MINES ARE ON CARE & MAINTANENCE BECAUSE OF LOW TIN PRICES AS OF 6-90.
  • 901,600 MT RESOURCES 1-90 PER CRU STUDY.

Workings at the site

  • Type of workings Underground
    Overall depth 260M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OVERHAND SHRINKAGE 10-67
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Number of Shafts 1
    1st Condition of Workings OPEN
    Capacity 200
    Capacity Units MT ORE/DAY
    Unit Production Cost 44.7
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 3
    Year of Information 1983

Comments on other economic factors

  • THE SOUTH CROFTY MILL PROCESSES PENDARVES ORE. EXTENSIVE STUDIES HAVE BEEN CONDUCTED TO SEPARATE WOLFRAMITE FROM CASSITERITE IN THE TIN CONCENTRATES. PART OF THE CASSITERITE CONTAINS INCLUSIONS OF IRON OXIDE WHICH PREVENT ITS SEPARATION FROM WOLFRAMITE BY MAGNETIC METHODS.
  • TIN CONCENTRATES ARE SHIPPED IN BULK TO THE CAPPER PASS SMELTER/REFINERY NEAR HULL.

Reference information

Bibliographic references

  • Deposit

    SOUTH CROFTY PLC, ANNUAL REPORTS, 1978-1982.

  • Deposit

    WELLS, D.T., AND ELLIOTT, A.J., MILL MODIFICATION AT SOUTH

  • Deposit

    CROFTY LIMITED, IMPROVE THROUGHPUT AND RECOVERY, CIM, XIV

  • Deposit

    INTERNATIONAL MINERAL PROCESSING CONGRESS, TORONTO,

  • Deposit

    CANADA, OCTOBER, 1982.

  • Deposit

    DINES, H.G., THE METALLIFEROUS MINIG REGION OF S-W ENGLAND,

  • Deposit

    H.M. STATIONERY OFFICE, LONDON.

  • Deposit

    ANNON, BRITISH REGIONAL GEOLOGY, S.W. ENGLAND, H.M.

  • Deposit

    STATIONERY OFFICE LONDON.

General comments

Subject category Comment text
Deposit THE TRYPHENA AND HARRIET LODES, MINED AT PENDARVES, HAVE A A STRIKE DIRECTION OF SOUTHWEST-NORTHEAST AND DIP BETWEEN 56 AND 80 DEGREES, VARYING IN WIDTH BETWEEN 0.5 AND 2 M.

Reporter information

Type Date Name Affiliation Comment
Reporter 21-SEP-1992 Sabin, A. E. 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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