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South Crofty Tin Mine.

Producer in United Kingdom with commodities Stone, Tin, Tungsten
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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. Mining district
  11. Ownership information
  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 10230987
MAS/MILS ID 4120100002
Record type Site
Current site name South Crofty Tin Mine.
Alternate or previous names Poole Tin Mine

Geographic coordinates

Geographic coordinates: -5.26448, 50.23236 (WGS84)
Elevation 50

Site location context

Political divisions (FIPS codes)

United Kingdom(country)

Europe(continent)

Land(continent)

Geographic areas

Country
United Kingdom

Commodities

Commodity Importance
Stone Tertiary
Tin Critical Tertiary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Arsenopyrite Unknown
Cassiterite Unknown
Hematite Unknown
Pyrite Unknown
Scheelite Unknown
Tourmaline Unknown

Nearby scientific data

(1) -5.26448, 50.23236
ListMap

Economic information

Ore body information

  • Thickness 1M
    Depth to top 540M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 LENTICULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. MODERATE
    Strike And Dip N75E:
    Minimum Depth to Top 370
    Date of Last Modification 780615

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Both
Significant No
Discovery year 1700
Year of first production 1720

Mining district

District name Cornwall

Ownership information

  • Type Owner
    Owner St. Piron Mining Co. Ltd.
    Interest 100
    Home office United Kingdom
    Year 1973
  • Type Operator
    Owner South Crofty Ltd.
    Home office United Kingdom
    Year 1973

Workings at the site

  • Type of workings Underground
    Overall depth 700M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Mining Method COMBINED METHODS
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Number of Shafts 3
    Capacity 900
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
    Year of Information 1977

Reference information

Bibliographic references

  • Deposit

    EVANS,R.K.1969.REBUILDING CORNWALL'S TIN INDUSTRY.E/MJ.NOV.1

  • Deposit

    82-86

  • Deposit

    1976 E/MJ INT.DIRECTORY OF MINING&MINERAL PROCESSING UNITS,N

  • Deposit

    ,N.Y.1976.P.230.

  • Deposit

    US BU MINES MINERALS YEARBOOK.VOL.III.INT.REPORTS,THE MINERA

  • Deposit

    OF THE U.K.1973.

General comments

Subject category Comment text
Deposit 77-RCD 030-SOUTH CROFTY MINE LOCATED 1KM N OF REDRUTH & 3 KM CAMBOURNE,IN CORNWALL DIST. 77-RCD 050-EXTENSIVE DIAMOND DRILLING PRECEDES ANY NEW WORKI DRIVES&RAISES SAMPLED AT 1.5 M INTERVALS,STOPES SAMPLED AT INTERVALS. 77-RCD 070-GRAIN SIZE OF CASSITERITE IS VERY FINE. 77-RCD 080-TWO SETS OF LODES INTERSECTING AT RIGHT ANGLES;EN STRIKING LODES ARE ECONOMIC,NNW STRIKING LODES BARREN.SN D RIBUTION VERY ERRATIC(LOCALLY CONCENTRATED PATCHES OF ORE AT STRUCTURAL CHANGES IN LODES. 77-RCD 601-GRADE ESTIMATED;RESERVE TONNAGE UNKNOWN IN 1976. 77-RCD 620-MINING IN AREA SINCE 1720.3 SHAFTS:ROSKEAR(VENTIL ROBINSON(MEN&MATERIALS) AND COOK(ORE&WASTE).9 LEVELS IN 19 M. INTERVALS.MAIN HAULAGE LEVEL AT 700 M(2.7 M SQUARE TUNN CROSSCUTS&DRIVES 2.1 M SQUARE.COMBINATION MINING METHOD:UN HAND,OVERHAND,&SUBLEVEL STOPING WITH 5.5X6.1 M PILLARS LEF WORKED.ORE DRILLED&BLASTED,MUCKED BY 23 EIMCO SHOVELS,ORE& HAULED IN 1&2.5 TON ORE CARS (19 ELEC.LOCOMOTIVES IN 1969) HAULED TO 40 TONNE/HR.SWING JAW CRUSHER AT 700 M LEVEL THE SCREENED TO -75 MM THEN HOISTED TO SURFACE.(ALL EQUIPMENT WORKINGS DESCRIPTIONS ARE FOR OPERATIONS IN 1969 AT CAP.OF TONNES/DAY. 77-RCDS 651-654-ORE CRUSHED TO 63 MM ON SURFACE AND THEN ENT MILL.-2MM FINES REMOVED BY WASHING.&2MM&-3/4 IN.MATERIAL G HEAVY MEDIA SEPERATION.SINK GOES TO TABLING UNIT.TABLING C SENT TO FROTH FLOTATION(REMOVAL OF PYRITE&ARSENOPYRITES).F DRESSING TO 65-70% SN CONCS.ON VIBRATING TABLES.COARSE SAN ARE DRIED&PASSED THROUGH MAGNETIC SEPARATORS TO REMOVE WO3 SILICON 77-RCD 660-SN CONCS.DRIED,BAGGED THEN TRUCKED&RAILED TO WELT WORKS OF CAPPER PASS LTD. AT N. FERRIBY,HUMBERSIDE;BRITIAN SN SMELTER IN 1976. TOTAL WORKFORCE IN 1973 WAS 475. 69-TAILINGS AT SOUTH CROFTY( .31% SN)ARE RETREATED IN A 3-ST STREAMING PLANT WHERE SN CONC. IS RECOVERED FROM BATTERIES 22,12&6 ROUND TABLES.THIS TAILINGS PLANT WAS ECONOMICALLY ONLY BECAUSE IT IS OPERATED AS A SUBSIDIARY OF SOUTH CROFT

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Boyle, Ed 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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