1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Derbyshire Deposits/Cavendish Mill

Producer in United Kingdom with commodities Barium-Barite, Fluorine-Fluorite, Lead, Sand and Gravel, Construction
Map
XML
JSON
KML
B
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. Mineral rights holdings
  11. Ownership information
  12. Production statistics
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10254946
MAS/MILS ID 4120100034
Record type Site
Current site name Derbyshire Deposits/Cavendish Mill
Alternate or previous names Derbyshire Deposits

Geographic coordinates

Point of reference Plant
Geographic coordinates: -1.74761, 53.24899 (WGS84)
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

United Kingdom(country)

Europe(continent)

Land(continent)

Geographic areas

Country
United Kingdom

Commodities

Commodity Importance
Barium-Barite Critical Tertiary
Fluorine-Fluorite Critical Primary
Lead Secondary
Sand and Gravel, Construction Tertiary

Materials information

Materials Type of material
Barite Unknown
Fluorite Unknown
Lead Unknown

Nearby scientific data

Plant (1) -1.74761, 53.24899
ListMap

Economic information

Ore body information

  • Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 FISSURE VEIN
    Shape of Orebody #2 IRREGULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 SILICIFICATION
    Date of Last Modification 850826

Comments on the geologic information

  • VEIN ORES TYPICALLY AVERAGE 50% CAF2. REPLACEMENT ORES AVERAGE 20 TO 27% CAF2. CARBONIFEROUS LIMESTONE FORMATION FORMS DOME THAT OUTCROPS OVER A 520 SQUARE KILOMETER AREA. WORKABLE VERTICLE INTERVAL IS 100 METERS.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Producer
Commodity type Both
Significant Yes
Milling method Flotation

Mineral rights holdings

Type of mineral rights Other

Ownership information

  • Type Owner-Operator
    Owner Laporte Minerals
    Interest 100
    Home office United Kingdom
    Year 1982

Production statistics

  • Year 1968
    Description 200000 Mtpy
  • Year 1969
    Description Caf2 Ore Grade 25 Wt% 200000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 200000mt 25wt-pct
  • Year 1970
    Description Caf2 Ore Grade 25 Wt% 400000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 400000mt 25wt-pct
  • Year 1971
    Description Caf2 Ore Grade 25 Wt% 400000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 400000mt 25wt-pct
  • Year 1972
    Description Caf2 Ore Grade 25 Wt% 550000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 550000mt 25wt-pct
  • Year 1973
    Description Caf2 Ore Grade 25 Wt% 590000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 590000mt 25wt-pct
  • Year 1974
    Description Caf2 Ore Grade 25 Wt% 590000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 590000mt 25wt-pct
  • Year 1975
    Description Caf2 Ore Grade 25 Wt% 590000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 590000mt 25wt-pct
  • Year 1976
    Description Caf2 Ore Grade 25 Wt% 590000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 590000mt 25wt-pct
  • Year 1977
    Description Caf2 Ore Grade 25 Wt% 590000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 590000mt 25wt-pct
  • Year 1978
    Description Caf2 Ore Grade 25 Wt% 580000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 580000mt 25wt-pct
  • Year 1979
    Description Caf2 Ore Grade 25 Wt% 560000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 560000mt 25wt-pct
  • Year 1980
    Description Caf2 Ore Grade 25 Wt% 550000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 550000mt 25wt-pct
  • Year 1981
    Description Caf2 Ore Grade 25 Wt% 400000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 400000mt 25wt-pct
  • Year 1982
    Description Caf2 Ore Grade 25 Wt% 380000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major CaF2 Ore Fluorine-Fluorite Fluorine 380000mt 25wt-pct
  • Year 1990
    Description 1990 Total Mill Output 72600 Ore In Tonnes
  • Year 1990
    Description 1990 Sallet Hole Ore Production 66500 Ore In Tonnes
  • Year 1992
    Description 1992 Mill Output 75000 Tonnes Of Acidspar

Comments on the production information

  • BETWEEN 1968 AND 1977, BOTH METALLURGICAL AND ACID GRADE FLUORSPAR WERE PRODUCED.

Reserves and resources

  • Type In-situ
    Estimate year 1982
    Indicated 2761000mt ore
    Demonstrated 2761000mt ore
    Inferred 5000000mt ore
    Total resources 7761000mt ore
    Commodity Subtype Grade units Group Importance Year
    Fluorine-Fluorite CaF2 25 wt-pct Fluorine Major 1982

Comments on the reserve resource information

  • THE SOURCES OF ORE ARE APPROXIMATELY ONE-THIRD FROM EACH OF THREE SOURCES: THE BRADWELL MOOR VEIN MINE SYSTEM, MOSTLY SALLET HOLE UNDERGROUND MINE; THE OPEN PIT MINES IN THE MATLOCK AREA; AND THE TRIBUTOR SOURCES, CONSISTING OF SIX TO TWELVE SMALL OPERATORS. M1C1=M9C4. RESERVES ESTIMATE BY LAPORTE MINERALS MANAGEMENT. Q4= Q2+Q3 Q4 = Q2 (SALLET HOLE) + Q3 (MILLDAM MINE) GRADE IS AVERAGED FROM THE TWO DEPOSITS.
  • ACID AND METALLURGICAL GRADE FLUORSPAR, LEAD, BARITE MUD AND SAND/GRAVEL
  • MUCH OF THE RESERVES OF THE DISTRICT HAVE CONSISTED OF STOPE FILL FROM OLD LEAD MINING ON WHICH NO GOOD RECORDS WERE KEPT, IN MANY CASES DATING BACK TO ROMAN TIMES.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method CAVING METHODS
    Percent Waste Rock 9.9
    Percent Recovery 90
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Length of Inclines (m) 3500
    Number of Inclines 1
    1st Condition of Workings UNKNOWN
    Capacity 270
    Capacity Units MT ORE/DAY
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1991
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Length of Inclines (m) 2000
    Slope of Inclines 7
    Number of Inclines 1
    Capacity 270
    Capacity Units MT ORE/DAY
    Operating Days per Year 250
    Operating Shifts per Day 3
    Year of Information 1991

Comments on other economic factors

  • THE MILL SITE AND MINE SITES ARE ALL WITHIN THE PEAKS NATIONAL PARK, SO THAT VERY STRICT RESTRICTIONS HAMPER SITING OF ROADS, PONDS AND THE APPEARANCE OF BUILDINGS AND OTHER STRUCTURES. BUILDING APPEARANCES MUST CONFORM TO 17TH CENTURY (OR EARLIER) STONE STYLES, AS CLOSELY AS POSSIBLE, AND OLD STONE FENCES MAY NOT BE DISTURBED. REVEGETATION IS REQUIRED AROUND ALL MINING SITES AND TAILING STORAGE PONDS.

Reference information

Bibliographic references

  • Production

    INDUSTRIAL MINERALS. AUGUST 1994. NO. 323. "ISO 9002 AT

  • Production

    CAVENDISH FOR LAPORTE," P. 47.

  • Production

    INDUSTRIAL MINERALS. APRIL 1993. NO. 307. PG. 46.

  • Reserve-Resource

    SIMPSON, J., LAPORTE MINERALS SPECIAL REPORT TO DAMES &

  • Reserve-Resource

    MOORE.

  • Deposit

    MASON, J.E., GEOLOGY OF THE DERBYSHIRE FLUORSPAR DEPOSITS,

  • Deposit

    UNITED KINGDOM.

  • Deposit

    MINING MAGAZINE, SEPT. 1976. TABLE B-1126 MINES ACCOUNTING

  • Deposit

    FOR ALL OUTPUT OTHER THAN COAL.

  • Deposit

    FULTON, ROBERT B. MINE/MILL/DEPOSIT REPORT. "LAPORTE

  • Deposit

    MINERALS, LTD." SEPT. 1991.

General comments

Subject category Comment text
Deposit DATA CONTAINED IN THIS FILE WAS COLLECTED BY DAMES & MOORE UNDER U.S. BUREAU OF MINES CONTRACT #JO225010 IN 1983. DATA WAS UPDATED IN 1991. BY TRIP REPORT FROM R.B. FULTON.

Reporter information

Type Date Name Affiliation Comment
Reporter 11-OCT-96 Kilgore, Catherine C. U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site