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Langvatn Molybdenium Mines, Bykle, Aust-Agder, Norwayi
Regional Level Types
Langvatn Molybdenium MinesGroup of Mines
BykleMunicipality
Aust-AgderCounty
NorwayCountry

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Name in Norwegian:Langvatn molybdengruver, Bykle, Aust-Agder, Norge
Latitude & Longitude (WGS84): 59° 39' 17'' North , 7° 12' 16'' East
Latitude & Longitude (decimal): 59.65485,7.20451
GeoHash:G#: u4t57gy4t
Locality type:Group of Mines
Köppen climate type:Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Hovden265 (2017)13.5km
Røldal357 (2013)29.5km
Bykle223 (2016)34.5km


Located near the borders of the counties; Telemark, Aust-Agder and Rogaland, and the mountain Dyrskardnuten.
According Monen (2016) there have been two companies active in the Langvatn molybdenium mine in the period 1898-1918:
- The Kobbernuten Interessenskap was the first to prospect at the Breiveheiane, at Kåpårnuten and near the Langvatn Lake in 1898.
- I/S Kobbernuten had acquiered the mining rights in this area, and signed a contract with german industrial magnate dr. Alexander Nack, leasing out the mining rights to him. Additionally he needed to have separate deals with the farmers to construct the mining buildings, access to water, the right to use the land for having horses and cows in the area around the mine.
The horses were necessary for transport from and to the mine, while the cows would supply the workers with milk, butter and meat. It turned out that Nack didn't fullfill all the requirements of the norwegian state. He tried to avoid these rules by making a deal with german company Gewerkschaft Bergmans Glück of Gotha regarding the leasing of the mining rights.
But when this company sent in an application to the Norwegian state, they found out that Nack's papers were not in order, and soon after it was found out that Nack was bankrupt.
The town council of Bykle decided in 1910 to allow the german company Gewerkschaft Bergmans Glück to lease the mining rights in the area where I/S Kobbernuten owned the mining rights.

Mining commenced 1910/1911.

In 1912 they had finished building the necessary equipment for processing the ore.
In 1913 they produced 1580 kg. of a concentrate containing 50% MoS2, 1700 kg with 40% MoS2 and about 10 ton with 23% MoS2. Additionally they produced 300 ton with 3-4% MoS2.
When the mine closed in 1913 the total production had been:
1580 kg with 50% MoS2
1700 kr. With 40% MoS2
10.030 kg with 23% MoS2

These concentrates had been transported to Hovden by horse, a long and dangerous trip.
In the spring of 1918 the Kobbernuten Interessentskap started mining the deposit again. Cynically enough the ore they produced was exported to germany for use in armed steel in tanks etc.

Exactly how much was produced in the last period is not known, but soon after the war the mine must have been closed down for good.
In 1960 the deposit was thorougly studied, but was not considered to be of economic interest.

There are two shafts and several open pits.

The ore contained 0,36% MoS2 and had a rhenium content of 182 ppm and 100 ppm in two separate molybdenite samples (Burvald 1983).

Coordinates © Kartverket - https://www.kartverket.no

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
ScandinaviaRegion

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


16 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
'Apatite'
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Bornite
Formula: Cu5FeS4
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Calcite
Formula: CaCO3
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Chalcopyrite
Formula: CuFeS2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
'Chlorite Group'
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Ilmenite
Formula: Fe2+TiO3
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Molybdenite
Formula: MoS2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Powellite
Formula: Ca(MoO4)
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Pyrite
Formula: FeS2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Pyrrhotite
Formula: Fe7S8
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Quartz
Formula: SiO2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Rutile
Formula: TiO2
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
Titanite
Formula: CaTi(SiO4)O
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10(3),12-15

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcopyrite2.CB.10aCuFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Group 4 - Oxides and Hydroxides
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Powellite7.GA.05Ca(MoO4)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Powellite48.1.2.2Ca(MoO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H AzuriteCu3(CO3)2(OH)2
H MalachiteCu2(CO3)(OH)2
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C CalciteCaCO3
C AzuriteCu3(CO3)2(OH)2
C MalachiteCu2(CO3)(OH)2
OOxygen
O MagnetiteFe2+Fe23+O4
O QuartzSiO2
O CalciteCaCO3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O IlmeniteFe2+TiO3
O TitaniteCaTi(SiO4)O
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O RutileTiO2
O AlbiteNa(AlSi3O8)
O AzuriteCu3(CO3)2(OH)2
O PowelliteCa(MoO4)
O MalachiteCu2(CO3)(OH)2
O Garnet GroupX3Z2(SiO4)3
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na AlbiteNa(AlSi3O8)
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al AlbiteNa(AlSi3O8)
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si TitaniteCaTi(SiO4)O
Si AlbiteNa(AlSi3O8)
Si Garnet GroupX3Z2(SiO4)3
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SSulfur
S ChalcopyriteCuFeS2
S BorniteCu5FeS4
S MolybdeniteMoS2
S PyrrhotiteFe7S8
S PyriteFeS2
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
CaCalcium
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca TitaniteCaTi(SiO4)O
Ca PowelliteCa(MoO4)
TiTitanium
Ti IlmeniteFe2+TiO3
Ti TitaniteCaTi(SiO4)O
Ti RutileTiO2
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe ChalcopyriteCuFeS2
Fe BorniteCu5FeS4
Fe MagnetiteFe2+Fe23+O4
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe IlmeniteFe2+TiO3
CuCopper
Cu ChalcopyriteCuFeS2
Cu BorniteCu5FeS4
Cu AzuriteCu3(CO3)2(OH)2
Cu MalachiteCu2(CO3)(OH)2
MoMolybdenum
Mo MolybdeniteMoS2
Mo PowelliteCa(MoO4)

Geochronology

Mineralization age: Stenian : 1041 Ma to 1022 Ma

Important note: This table is based only on rock and mineral ages recorded below and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Precambrian
 Proterozoic
  Mesoproterozoic
   Stenian
ⓘ Molybdenite (youngest age)1022 Ma
ⓘ Molybdenite (oldest age)1041 Ma

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Proterozoic
541 - 2500 Ma



ID: 3186372
Proterozoic crystalline metamorphic rocks

Age: Proterozoic (541 - 2500 Ma)

Lithology: Granitoid gneiss; orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Mesoproterozoic
1000 - 1600 Ma



ID: 3155363
Proterozoic II meta-sandstone

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: undifferentiated metamorphic

Lithology: Major:{meta-sandstone}, Minor{conglomerate,marble,meta-volcanic rock group}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Burvald, I. (1983): Langvatn Molybdenforekomst. NAGS-nytt 10 (3),12-15.
Monen, S. (2016): Gruvedrift og nikkelindustri i Setesdal. Arbeidsfolk fortel m.m. Vol 1-3. Evje og Hornnes kommune. Vol 1. ISBN Book 1: 978-82-690462-1-2
Geological Survey of Norway. The Ore Database. Deposit Area 941 - 001. Langvatn. (Last updated 17. Jan. 1997)

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