English version
	MALMDATABASEN
	Forekomstområde 827 - 006
	(Sist oppdatert 28.mar.2020)

Betydning

Offentlig:

Not Assessed (reg. 18.02.2015)

Economical:

Ikke vurdert

Operations

	From - To	Activity	Comments
	1862 - 1862	Test mining
	1915 - 1918	Test mining
	1988 - 1992	Geology	Company/Institution :Århus Universitet
	2006 - 2006	Sampling	Company/Institution :NGU

Mineralization

	Era:	Proterozoic	Period:	Neoproterozoic
	Dating:		Method:
	Genesis:	Hydrotermal gang	Form:	Plate
	Main texture:	Sprekkefylling	Min. distribution:	Disseminert

Main grain size:

Finkornet (<1 mm)

Main alteration:

Klorittisering

	Strike/Dip:		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:

Vindeggen Group

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Tourmaline	Subordinate mineral (1-10%)
	Gangue mineral	Carbonate	Subordinate mineral (1-10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Bismutite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)
	Ore mineral	Galena	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Amfibolitt	Intrusive Original rock :Gabbro
			Metamorphic facies :Amphibolite
	Wall rock	Kvartsitt	Sedimentary Original rock :Quartz sandstone
			Metamorphic facies :Amphibolite

Opplysning(er) i fritekstformat

Fri tekst

Den øvre del av forekomsten ligger rett øst for låven på gården Gjuv. Inngangen til en stoll som er ca. 50 n lang er nå fylt med skrot. Stollen skal være ca. 50 m lang. Fra stollinngangen går en 25 m lang dagskjæring med retning 325º nedover langs et bekkefar. Ca. 150 m lengre ned i samme retning er det anlagt en ny skjæring inn mot nedre stoll. Den er ca. 25 m lang og har retning 150º. Mindre forsøksdrift ble utført i 1862 og senere i perioden 1915-18. I 1917-18 ble det utskeidet ca. 8 t malm med 1,5 % Bi. Det er svært dårlig blottet omkring forkomsten da den er omgitt av dyrka mark. Øvre stoll er anlagt i finkornet, gråhvit kvartsitt, mens kloritt-rik amfibolitt dominerer i veggene i nedre skjæring. Der finnes en uregelmessig kvarts-turmalin gang med retning ca. 120º/50º. På tippene sees sulfidmineraliserte stuffer av kvarts+karbonat+turmalin. Vismutglans er mest vanlig i karbonatførende kvartsblokker. I tillegg finnes varierende mengder pyritt.

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.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	TE0044.01	Dump	Sampler :J.S. Sandstad/...Stored :L¿kken/...Size(kg) :2 Kommentar :Pyritt+Bi-mineral, disseminasjon i kvarts med turmalin No. of registrated element analyses = 1
	TE0044.02	Dump	Sampler :J.S. Sandstad/...Stored :L¿kken/...Size(kg) :2 Kommentar :Bi-mineral+pyritt, aggregater i grovkornet kvarts+karbonat+turmalin ¿re No. of registrated element analyses = 1
	TE0044.03	Dump	Sampler :J.S. Sandstad/...Stored :L¿kken/...Size(kg) :2 Kommentar :Pyritt+Bi-mineral, kraftig disseminasjon i amfibol-kvarts bergart 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

Forekomstområde 827 - 006 Gjuv

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#
TE0044.01	Dump	140	-100	200	20	10	-2.0	10.0
TE0044.02	Dump	300	-100	1000	-10	-10	3.0	20.0
TE0044.03	Dump	30	-100	-100	100	10	-2.0	10.0

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Sample No.	As*	Cd*	Mo*	Sb*	Bi*	Cr*	Mn*	Fe%	W*
TE0044.01	-100	-10.0	20.00	-10	1700	10	400	2.00	-10
TE0044.02	-100	-10.0	-10.00	30	9000	-10	3400	3.07	-10
TE0044.03	-100	-10.0	40.00	-10	600	-10	200	4.03	-10

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Sample No.	Sr*	P*	Ca*
TE0044.01	10.0	0	1
TE0044.02	60.0	0	8
TE0044.03	10.0	0	1

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Faktaarket ble generert 13.06.2026

Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no

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