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Montroc Mine

Producer in France with commodity Fluorine-Fluorite
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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. Mineral rights holdings
  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 10134380
MAS/MILS ID 4270820002
Record type Site
Current site name Montroc Mine
Alternate or previous names Montroc, Le Moullinal, Le Burg

Geographic coordinates

Geographic coordinates: 2.36869, 43.74901 (WGS84)

Site location context

Political divisions (FIPS codes)

France(country)

Europe(continent)

Land(continent)

Geographic areas

Country
France

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary

Materials information

Materials Type of material
Chalcopyrite Unknown
Fluorite Unknown
Quartz Unknown
Siderite Unknown

Nearby scientific data

(1) 2.36869, 43.74901
ListMap

Economic information

Ore body information

  • Thickness 100M
    Length 1000M
    Width 250M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SERICITIC
    Minimum Depth to Top 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 850805

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant Yes
Mining method Open Pit
Year of first production 1963
Milling method Flotation

Mineral rights holdings

Type of mineral rights Unknown

Ownership information

  • Type Owner-Operator
    Owner Ste Generale De Recherches Et D'Exploitations Minieres
    Interest 100
    Home office France
    Year 1994

Comments on the ownership information

  • SOGEREM IS A MINING SUBSIDIARY OF PECHINEY-UGINE-KUHLMANN (PUK), A GOVERNMENT OWNED CHEMICAL AND MANUFACTURING COMPLEX.

Comments on the production information

  • PAST MINING PRODUCTION FOR THE YEARS 1968 TO 1982 WAS 120,000 MT/YR.

Comments on the reserve resource information

  • RESERVE ESTIMATED BY SOGEREM MINE MANAGEMENT.
  • ACID AND CERAMIC FLUORSPAR MONTROC MILL PROCESSES ORE FROM LE BURC AND LE MOULINAL SEE SEPARATE ENTRIES FOR GRADES AND TONNAGES OF EACH MINE. MILL PROCESSES 160,000 MTPY AT 35.24% CAF2. NEW EVALUATION BY R. FULTON 9/86.

Workings at the site

  • Type of workings Surface
    Area 120HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Percent Waste Rock 94
    Primary Material Cover M-HARD ROCKS
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Capacity 480
    Capacity Units MT ORE/DAY
    Unit Production Cost 24.79
    Units of Production $/MT ORE
    Operating Days per Year 250
    Year of Information 1982

Comments on other economic factors

  • THE MONTROC MILL HAS AN 85,000 TPA ACIDSPAR CAPACITY.
  • MONTROC PROCESSES ABOUT 7,600 MT/YR OF LE BURC ORE, PRODUCING 5,500 MT/YR OF ACID GRADE CONCENTRATE.
  • PRORATED MILL OPCOST WAS USED IN CALCULATING THE MILL WORKING CAPITAL.
  • ACID GRADE FLUORSPAR IS SHIPPED TO PECHINEY CHEMICAL PLANT AT ALES. IF THE PRODUCT WERE TO BE EXPORTED, IT WOULD PROBABLY BE SHIPPED FROM THE PORT OF BORDEAUX, WHICH IS LOCATED SOME 260 KM FROM THE MILL. THE CERAMIC GRADE MATERIAL IS SOLD TO VARIOUS FRENCH CONSUMERS.
  • THE AVERAGE DIMENSIONS OF THE OPEN PIT AREA IN 1982 WERE 120 M IN LENGTH, 100 M IN WIDTH, AND 15 M IN DEPTH. DUE TO THE PRESENCE OF A HIGH HILL NEXT TO THE OPEN CUT, APPROXIMATELY 2,000,000 TONS OF WASTE MUST BE REMOVED PER YEAR. SOME OF THE WASTE ROCK IS HAULED TO THE LE BURC MINE FOR USE AS STOPE BACKFILL. MINE RECOVERY IS 90%.

Reference information

Bibliographic references

  • Production

    INDUSTRIAL MINERALS. APRIL 1993. NO. 307. P. 47.

  • Deposit

    FULTON, R.B. TRIP REPORT. SEPT. 1986.

General comments

Subject category Comment text
Deposit THE ORE DEPOSIT CONSISTS OF AN EAST-WEST VEIN, WITH A BRANCHING VEIN STRIKING N 60 TO 70 E. THERE ARE SEVERAL OFFSHOOT VEINS, MOST INDIVIDUALLY ONLY 30 TO 50 CM WIDE STRIKING IN A N60E DIRECTION. DATA CONTAINED IN THIS FILE WAS COLLECTED BY DAMES & MOORE UNDER U.S. BUREAU OF MINES CONTRACT #JO225010 IN 1983.

Reporter information

Type Date Name Affiliation Comment
Reporter 03-MAY-1994 Kilgore, Catherine C. 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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