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Knaben Molybdenum Mines, Knaben, Kvinesdal, Agder, Norwayi
Regional Level Types
Knaben Molybdenum MinesGroup of Mines
KnabenMining District
KvinesdalMunicipality
AgderCounty
NorwayCountry

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PhotosMapsSearch
05261420017272077348599.jpg
Map over the area where the Hommen molybdenum mine is located.

Hommen Molybdenum Mine, Knaben molybdenum mines, Knaben, Kvinesdal, Agder, Norway
05019310017272077352070.jpg
Molybdenite

Knaben Molybdenum Mines, Knaben, Kvinesdal, Agder, Norway
00138040017272077361414.jpg
Molybdenite, etc.

Knaben Molybdenum Mines, Knaben, Kvinesdal, Agder, Norway
05261420017272077348599.jpg
Map over the area where the Hommen molybdenum mine is located.

Hommen Molybdenum Mine, Knaben molybdenum mines, Knaben, Kvinesdal, Agder, Norway
05019310017272077352070.jpg
Molybdenite

Knaben Molybdenum Mines, Knaben, Kvinesdal, Agder, Norway
00138040017272077361414.jpg
Molybdenite, etc.

Knaben Molybdenum Mines, Knaben, Kvinesdal, Agder, Norway
01118470017272077371088.jpg
Map over the area where the Hommen molybdenum mine is located.

Hommen Molybdenum Mine, Knaben molybdenum mines, Knaben, Kvinesdal, Agder, Norway
00062530017272077383116.jpg
Molybdenite

Knaben Molybdenum Mines, Knaben, Kvinesdal, Agder, Norway
Latitude & Longitude (WGS84):
58° North , 7° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
GRN:
N40E03
Type:
Group of Mines
Köppen climate type:
Dfc : Subarctic climate
Mindat Locality ID:
49802
Long-form identifier:
mindat:1:2:49802:2
GUID (UUID V4):
0
Other/historical names associated with this locality:
Knabheia
Other Languages:
Norwegian:
Knaben molybdengruver, Knaben, Kvinesdal, Agder, Norge


The mines were in operation between 1885 to 1973.

From Müller at al (2015):
"The major rock type in the Knaben district is weakly foliated, porphyric reddish biotite granite with an intrusion age of ca. 1036 Ma belonging to the Mesoproterozoic Sirdal Magmatic belt. The porphyric granite contains mega screens and xenoliths of amphibolite and flaser gneiss in an area >10 km long (N-S) and 1 km wide (E-W).
In the Kinaben 2 and Ørnehommen mines the porphyric granite is intruded by grey, quartz-rich granite with disseminated molybdenite. Latter is assumed to be the primary source of molybdenum.
Coarse-grained molybdenite mineralization is commonly associated with ductile deformed, pegmatitic quartz bands and in one case with a large (300x150x5 m) pegmatite (Kvina mine)."

NOTE Ronald Werner April 2021:
I base the registrations done by me on Müller (2015) and the Riksantikvaren.no. Most of these registrations are probably spot-on, but in a few cases there will be a margin of error, and it is very well possible that the registrations of the Riksantikvaren are not 100% reliable and also that maybe some localities were overseen.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

10 valid minerals.

Detailed Mineral List:

ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Ferrimolybdite
Formula: Fe2(MoO4)3 · nH2O
Description: Sample in the collection of Naturhstorisk Museum, Oslo.
ⓘ Molybdenite
Formula: MoS2
Description: Large masses of molybdenite wwiging up to 5 ton has been found. In 1914 a 9 ton mass of quartz and 90% molybdenite was found.
ⓘ Molybdite ?
Formula: MoO3
Description: Sample in the collection of Naturhistorisk Museum in Oslo (from J.Schetelig 1915, labelled molybdite. Neumann (1985) question the identification, might possibly be a ferrimolybdite.
ⓘ 'Monazite Group'
Formula: REE(PO4)
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
ⓘ Uraninite
Formula: UO2
ⓘ Xenotime-(Y)
Formula: Y(PO4)
Description: Found in the heavy-fraction of ore-concentrate together with monazite-(Ce) and uraninite.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
ⓘUraninite4.DL.05UO2
ⓘMolybdite ?4.E0.10MoO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘFerrimolybdite7.GB.30Fe2(MoO4)3 · nH2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘXenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Unclassified
ⓘ'Monazite Group'-REE(PO4)

List of minerals for each chemical element

HHydrogen
Hⓘ FerrimolybditeFe2(MoO4)3 · nH2O
OOxygen
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ FerrimolybditeFe2(MoO4)3 · nH2O
Oⓘ MolybditeMoO3
Oⓘ Monazite GroupREE(PO4)
Oⓘ QuartzSiO2
Oⓘ Quartz var. Smoky QuartzSiO2
Oⓘ UraniniteUO2
Oⓘ Xenotime-(Y)Y(PO4)
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
SiSilicon
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ QuartzSiO2
Siⓘ Quartz var. Smoky QuartzSiO2
PPhosphorus
Pⓘ Monazite GroupREE(PO4)
Pⓘ Xenotime-(Y)Y(PO4)
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
CaCalcium
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ ChalcopyriteCuFeS2
Feⓘ FerrimolybditeFe2(MoO4)3 · nH2O
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
YYttrium
Yⓘ Xenotime-(Y)Y(PO4)
MoMolybdenum
Moⓘ FerrimolybditeFe2(MoO4)3 · nH2O
Moⓘ MolybdeniteMoS2
Moⓘ MolybditeMoO3
UUranium
Uⓘ UraniniteUO2

Localities in this Region

Norway
Norway

Other Regions, Features and Areas containing this locality

Baltic Shield (Fennoscandian Shield)Shield
Eurasian PlateTectonic Plate
EuropeContinent
Norway
ScandinaviaRegion

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References

uia.brage.unit.no (n.d.) https://uia.brage.unit.no/uia-xmlui/bitstream/handle/11250/2799846/%C3%98ivind%20Rogstad.pdf?sequence=1
Schetelig, Jakob (1937) Molybdenglansforekomstene i Knabheia (Fjotland). En malmgeologisk studie [The molybdenite deposits in Knabheia (Fjotland). An ore geological study]. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 17 (3). 165-172
Bugge, Arne (1963) Norges molybdenforekomster [Norway's molybdenum deposits]. Norges Geologiske Undersøkelse 217
Dons, Johannes A. (1968) Rhenium-bestemmelser på norsk molybdenglans. Mineralogisk-Geologisk Museum - Universitetet i Oslo- Interne notater, Geologisk Museums venner. 17Content of Rhenium in molybdenite from Knaben
Solås, Erna M. (1985) Litt om geologien i Knabeheiene. In Sørlandet Geologiforening 15 år 1985 [Sørlandet Geological Society 15 year 1985]. Sørlandet Geologiforening, Grimstad. p.28-28.
Karlsen, Torleif (1985) Molybdenen i Knabeheiene. In Sørlandet Geologiforening 15 år 1985 [Sørlandet Geological Society 15 year 1985]. Sørlandet Geologiforening, Grimstad. p.29-34.
www.knaben.no (2001) http://www.knaben.no
Bingen, B. & Holly, S. (2007): Fra gruvedrift til geoturisme. Geo 10 (4): 24-25.
jenn-k.com (2012) http://jenn-k.com/knaben/
Müller, A., Hederson, I., Jourdan, C., Slagstad, S. (2015) Mineralization styles and formation temperatures of the Knaben molybdenum deposits, southern Norway. Norges Geologiske Undersøkelse, Trondheim. ISSN: 0800-3416. 60 pp.
www.ngu.no (2017) https://www.ngu.no/upload/Publikasjoner/Rapporter/2015/2015_030.pdf
Rogstad, Ø. (2021) Gruvedrift i fred, krig og kald krig. Knaben Molybdængruber 1918-1973. Universitetet i Agder. 122 pp.
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