Norsk versjon
	THE ORE DATABASE
	Deposit Area 833 - 059
	(Last updated 16.aug.2024)

Importance

Public:

Little Importance (reg. 18.02.2015)

Economical:

Minor interest , (Confirmed 24.nov.2006 by Jan Sverre Sandstad)

Operations

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

Mineralization

	Era:	Proterozoic	Period:	Neoproterozoic
	Dating:		Method:
	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.

References not to be found in NGU's Reference Archive.:

Nixon, F. (1972) Preliminary report on investigations in the Kviteseid Mineralized belt of central Telemark. Sulfidmalm A/S. Bergvesenet BV 454. https://dirmin.no/sites/default/bibliotek/BV454.pdf

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.:

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Analyse Results

from

Deposit Area 833 - 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

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Sample No.	As*	Cd*	Mo*	Sb*	Bi*	Cr*	Mn*	Fe%	W*
TE0080.01	-100	-10.0	6610.00	-10	-100	-10	-100	.44	-10

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Sample No.	Sr*	P*	Ca*
TE0080.01	-10.0	0	0

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The fact sheet was created on 16.01.2025

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

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