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Tverrfjellet

Plant in Norway with commodities Copper, Gold, Iron, Silver, Sulfur, Zinc
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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. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10133792
MAS/MILS ID 4030250001
Record type Site
Current site name Tverrfjellet

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 9.48306, 62.22883 (WGS84)
Elevation 1100
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Norway(country)

Europe(continent)

Land(continent)

Geographic areas

Country
Norway

Commodities

Commodity Importance
Copper Primary
Gold Tertiary
Iron Primary
Silver Tertiary
Sulfur Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Unknown
Gold Unknown
Magnetite Unknown
Pyrite Unknown
Silver Unknown
Sphalerite Unknown

Nearby scientific data

Ore Body (1) 9.48306, 62.22883
ListMap

Economic information

Ore body information

  • Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 OTHER
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin CONT METASOMATIC
    Primary Ore Control IGNEOUS
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Date of Last Modification 830519

Comments on the geologic information

  • THE STREN SERIES IS A METAVOLCANO-SEDIMENTARY SEQUENCE. G-TOB: MASSIVE SULFIDES ASSOCIATED WITH EXHALATIVE VOLCANIC ROCKS. DEPTH OF MINERALIZATION IS UNKNOWN. THICKNESS OF UNCONSOLIDATED MATERIAL COVERING THE ZONE IS UNKNOWN. THREE LENTICULAR ORE BODIES VARY IN LENGTH BETWEEN 300 TO 800 METERS; AND IN WIDTH BETWEEN 5 AND 50 METERS, THE AVERAGE IS 12 TO 15 METERS. STRIKE: EAST-WEST; DIP: 70-90 DEGREES.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Both
Significant No
Discovery year 1920
Mining method Open Stope - Sublevel
Year of first production 1969
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Comments on exploration

  • DISCOVERY METHOD AND EXPLORATION METHODS ARE UNKNOWN

Mining district

District name Trondheim

Mineral rights holdings

Type of mineral rights Minerals Only

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Folldal Verk A/S
    Interest 100
    Home office Norway
    Year 1990

Comments on the ownership information

  • OWNER IS WHOLLY OWNED SUBSIDIARY OF BORREGAARD A/S

Production statistics

  • Year 1968
    Description Initial Production 650000 Mt Ore/Yr
  • Year 1969
    Description 650000 Mtpy
  • Year 1970
    Description 650000 Mtpy
  • Year 1971
    Description 650000 Mtpy
  • Year 1972
    Description 650000 Mtpy
  • Year 1973
    Description 650000 Mtpy
  • Year 1974
    Description 650000 Mtpy
  • Year 1975
    Description 650000 Mtpy
  • Year 1976
    Description 650000 Mtpy
  • Year 1977
    Description 650000 Mtpy
  • Year 1978
    Description 650000 Mtpy
  • Year 1979
    Description 650000 Mtpy
  • Year 1986
    Period 1980-1986
    Description 1980-1986 600000 Mtpy

Reserves and resources

  • Type In-situ
    Estimate year 1978
    Total resources 14000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 10 g/mt Silver Trace 1978
    Copper Cu 1.0099 wt-pct Copper Major 1978
    Sulfur S 27 wt-pct Sulfur Minor 1978
    Sulfur S 36 wt-pct Sulfur Minor 1978
    Zinc Zn 1.1 wt-pct Zinc Minor 1978
    Gold Au 0.1 g/mt Gold Trace 1978
    Iron FeO 4 wt-pct Iron Major 1978
  • Type In-situ
    Estimate year 1984
    Measured 17000000mt ore
    Indicated 25000000mt ore
    Demonstrated 42000000mt ore
    Total resources 42000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 10 g/mt Silver Trace 1984
    Copper Cu 1.1 wt-pct Copper Major 1984
    Sulfur S 30 wt-pct Sulfur Minor 1984
    Zinc Zn 1 wt-pct Zinc Minor 1984
    Gold Au 0.1 g/mt Gold Trace 1984
    Iron Fe 2.7 wt-pct Iron Major 1984
  • Type In-situ
    Estimate year 1984
    Indicated 10400000mt ore
    Demonstrated 10400000mt ore
    Total resources 10400000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 10 g/mt Silver Trace 1984
    Copper Cu 1.1 wt-pct Copper Major 1984
    Sulfur S 30 wt-pct Sulfur Minor 1984
    Zinc Zn 1 wt-pct Zinc Minor 1984
    Gold Au 0.1 g/mt Gold Trace 1984
    Iron Fe 2.7 wt-pct Iron Major 1984

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method SUBLEVEL 10-43
    Percent Recovery 85
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics UNKNOWN
    1st Condition of Workings OPEN
    Capacity 1710
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1980

Comments on other economic factors

  • ORE IS CRUSHED UNDERGROUND AND THEN MOVED BY A BELT CONVEYOR TO A SURGE BIN. THE ORE IS THEN MOVED TO THE SURFACE MILL BY A SKIP HOIST. THE COPPER CONCENTRATES ARE SOLD TO BOLIDEN AND TO NORDDEUTSCHE AFFINENE. THE ZINC CONCENTRATES ARE SHIPPED TO THE EITREHEIM SMELTER AT ODDA, NORWAY.
  • U-SWE, U-WAS: UNKNOWN THE MAIN LEVELS (AT 60 METERS VERTICAL INTERVALS) AND INTERMEDIATE SUBLEVELS DEVELOPED FOR THE SUBLEVEL STOPING WHICH EXTRACTS MOST OF THE MINES OUTPUT ARE ACCESSED BY A 84 DEGREE INCLINED RAMP THAT, BY 1978, EXTENDED TO LEVEL 8, APPROXIMATELY 500 METERS BELOW SURFACE. THE MAXIMUM STRIKE LENGTH OF A STOPE IS 80 METERS, BUT 60 METERS IS AVERAGE. WHEREVER POSSIBLE, PILLARS ARE LOCATED IN AREAS OF LOW COPPER VALUES. A TRANSPORT DRIFT IS DEVELOPED ON STRIKE IN THE CENTER OF THE OREBODY, AND DRIFTS ARE DRIVEN ALONG NORTH AND SOUTH ORE/WASTE CONTACTS PARALLEL TO BUT SLIGHTLY ABOVE THIS DRIFT.

Reference information

Bibliographic references

  • Reserve-Resource

    MINING MAGAZINE, 10/84, P 289.

  • Reserve-Resource

    ANON., 1978, TVERRFJELLET-NORWAY'S HIGHEST MINE: MINING

  • Reserve-Resource

    MAGAZINE, VOL. 139 NO. 1, JULY, PP. 14-15, 17, 19, 21,

  • Reserve-Resource

    23.

  • Reserve-Resource

    MINING MAGAZINE, ENVIRONMENTAL CONTRLS AT TVERRFJELLET,

  • Reserve-Resource

    NORWAY, OCT. 1984, P. 289.

  • Reserve-Resource

    ENGINEERING AND MINING JOURNAL, 1989/1990 E&MJ

  • Reserve-Resource

    INTERNATIONAL DIRECTORY OF MINING, 1989, P. 269.

  • Deposit

    BUGGE, J. A. W., 1978, NORWAY IN MINERAL DEPOSITS OF EUROPE

  • Deposit

    VOL. I. NORTH-WEST EUROPE. S. H. U. BOWIE, A. KVALHEIN

  • Deposit

    & H. W. HASLAM EDS. LONDON, INSTITUTION OF MINING &

  • Deposit

    METALLURGY/MINERALOGICAL SOCIETY.

  • Deposit

    E/MJ INTERNATIONAL DIRECTORY OF MINING, 1978, P.332.

  • Deposit

    FRIETSCH, R., PAPUNEN, H. AND VOKES, F. M., 1979: THE ORE

  • Deposit

    DEPOSITS IN FINLAND, NORWAY AND SWEDEN- A REVIEW,

  • Deposit

    ECONOMIC GEOLOGY, VOL. 74 NO. 5, AUGUST, PP. 978-1001.

  • Deposit

    GEIS, H. P., 1978, STRUCTURAL CONTROL OF STRATIFORM SULFIDE

  • Deposit

    DEPOSITS, ECONOMIC GEOLOGY, VOL. 73, NO. 6, PP. 1161-

  • Deposit

    1167.

  • Deposit

    JUVE, G. AND VOKES, F. M., 1980, COPPER ORES IN SCANDINAVIA,

  • Deposit

    PAPER PRESENTED AT SYMPOSIUM ON EUROPEAN COPPER

  • Deposit

    DEPOSITS, BELGRADE, PROCEEDINGS, PP. 147-159.

  • Deposit

    WORLD MINES REGISTER, 1976-77, P. 124.

  • Deposit

    MINERALS AND MATERIALS, JUNE/JULY, 1987, P 32.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-SEP-96 Unknown 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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