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THE ORE DATABASE
Occurence 4034 - 059 Lindtjern
(Object Id: 5467)
(Last updated: 28.03.2020)

Location
County: Telemark Municipality: Tokke (4034)
Map 1:50000: Bandak (1513-1) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 461923 m. North: 6587062 m.
Longitude: 8.3290370 Latitude: 59.4204430
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Resource
Resource Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Resource Subtype: Molybdenium
Element(s): Mo
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
2006 - 2006 Sampling Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Hydrothermal vein Form: Lens
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Medium grained (1-3 mm) Main alteration: No country rock alteration
Strike/Dip: 60 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Mesoproterozoic
Province: South Norwegian Basement Province
Geotec.unit: Telemark Supergroup
Tectonic complex:
Igneous complex:
Group: Formation: Transtualhøgdi supracrustals

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Mica Subordinate mineral (1-10%)
Ore mineral Molybdenite Major mineral (>10%)
Ore mineral Chalcopyrite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Wall rock Porphyric quartz-feldspar rock Extrusive
Original rock :Rhyodacite
Metamorphic facies :Amphibolite

Information(s) in free text format
Free text
Skjerpet er meget lett å finne rett sør for bomveien opp fra Tveitgrendi ved sørvestenden av tjernet. En 2-3 m høy nabbe som består hovedsakelig av hvit kvarts står opp på sørsida av veien. Kvartsgangen har retning ca. 60º, og på vestsida av denne, 10-15 m fra veien er det sprengt en mindre skjæring i en lengde av ca. 5 m og høyde opptil 1,5 m. Kvartsgangen grenser i sørøst til en porfyrisk felsisk metavulkanitt som også opptrer som 0,5-1 m lange linser i kvartsen. Middels- til grovkornete flak (1-6 mm) av molybdenglans er anrika langs glimmerrike laminer og små linser av sidebergarten i kvartsen, men finnes også spredt i denne. Kvartsen er grovkornet og melkehvit. I mindre mengder finnes K-feltspat. De glimmerrike laminene er mest hyppig i de ytre deler av gangen som minst er 5-6 m bred.

Bibliography:
From NGU's Reference Archive:
Dons, Johannes A. , 1963
De prekambriske bergarter i Telemark, I. Gruber og skjerp innen gradeteigkart E36V Kviteseid.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.216;1-80 pages
Abstract:
Approximately 115 mines and claims have been examined in the years 1941-1961 during regional geological mapping of the Kviteseid quadrangle. The map area covers a part of the "Thelemark-Sætersdal ore province" established by prof. J.H.L. Vogt in 1886. The oldest mine in the area, opened in the year 1524, was worked for silver bearing chalcopyrite and bornite. Other mines have been worked for gold, native copper and silver, molybdenite, galena, arsenopyrite, bismuthinite. All the mines have long since been abandoned and most of the surface workings are overgrown and difficult to find. The 15 native copper and silver deposits (which also contain vanadium minerals) form a separate group. They are all situated along the contact between a sandstone and an overlying basalt, the ore being confined to the sandstone. Most of the other deposits are of Quartz vein type. In quartzites which cover the greatest part of the map area, most of the quartz veins are barren. The great abundance of ore minerals in quartz veins in basic lavas and basic sills may be due to favourable pH conditions in these rocks. The galena deposits are found within a limited area close to a penetrating granite. The ore mineral paragenese in some of the deposits may have been formed under hypothermal to mesothermal conditions whereas other possibly originated at lower temperatures.

Marstrander, H.
Beskrivelse av gruber og skjerp i Kviteseid i Telemark.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2647;35 pages
Abstract:
Følgende forekomster er malmgeologisk beskrevet: Finnekos, Langmyr, Bjørnbas, Johnsli, Sølvbergsli, Bjørgustøl, Åneroe, Toråsdækkan, Byggstøl, Lintjern, Raubergmutern, Myran, Skolteberg, Fløta, Dal (Lundevassdal), Haugen, Bygland, Soli, kleiv og Kroksmyr.

Fieldsamples
Sample No. Sample type Miscellanrous
TE0080.01 Dump
Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 2
Comment: Molybdenite flakes in quartz, commonly along mica laminae
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 4034 - 059 Lindtjern

Element analyses

( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)
Sample No. Sample Type Cu* Zn* Pb* Co* Ni* Ag* Au#
TE0080.01 Dump 230 -100 -100 -10 -10 -2.0 40.0
------------------
Sample No. As* Cd* Mo* Sb* Bi* Cr* Mn* Fe% W*
TE0080.01 -100 -10.0 6610.00 -10 -100 -10 -100 .44 -10
------------------
Sample No. Sr* P* Ca*
TE0080.01 -10.0 0 0


The fact sheet was created on 29.03.2024

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