Fact Sheet for <b>Occurence 4022

					Norsk versjon
	THE ORE DATABASE
	Occurence 4022 - 017 Hyttebekk
	(Object Id: 5479) (Last updated: 28.03.2020)

Location

County:

Telemark

Municipality:

Seljord (4022)

Map 1:50000:

Åmotsdal (1514-2)

Map 1:250000:

Skien

Coordinate system:

EU89-UTM Zone 32

East:

468914 m.

North:

6600320 m.

Longitude:

8.4502990

Latitude:

59.5400690

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Copper
			Element(s):	Cu

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:

Genesis: Hydrothermal breccia Form: Lens

Main texture: Fracture filling Min. distribution: Disseminated (<20 % ore minerals)

Main grain size: Medium grained (1-3 mm) Main alteration: Carbonatisation

Strike/Dip: 165 / 75 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 Calcite Major mineral (>10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Ore mineral Bornite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Wall rock Amphibolite Intrusive
Original rock :Dolerite

Metamorphic facies :Amphibolite

Information(s) in free text format

Free text

Forekomsten ligger i tett granskog like over øverste vannstand, på nordvestsida av det regulerte Sundsbarmvatnet, rett nord for Gullnes. Enkleste adkomst er langs stranda fra Hyttebekk seter, som ligger 600 m lengre NNV, når vannstanden ikke er på det høyeste nivå. Det er svært bratt rett ovenfor forekomsten opp mot veien. En 7 m lang dagskjæring med retning ca.75º fører inn mot en kort stoll som er anlagt 2 m høyere i terrenget. Sør for inngangen til stollen ser det ut til å være drevet en skjæring langs et 5-6 m høyt stup. Det er ikke kjent når forekomsten er drevet, men det skal være spor etter både fyrsetting og sprengning (Dons 1963). I veggene dominerer middelskornet, mørk grønnsvart amfibolitt, trolig metadoleritt som dels er breksjert. Den rikeste kobbermineralisering observeres i veggen sør for stollinngangen. Der finnes rester av en opptil 30-40 cm bred linse/gang med aggregater av kobberkis og fragmenter av sidebergarten. Den har orientering ca. 165º/70-80º og avtar i mektighet i veggen nord for inngangen. Flere liknende subparallelle tynne årer/linser finnes i veggen i stollen. Men de kan ha ulike retninger. De skjæres av en få cm bred, umineralisert kvarts-feltspat åre langs sørveggen av stollen.

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

TE0093.01 Dump

Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 2

Comment: Chalcopyrite aggregates in medium-grained carbonate vein

No. of registrated element analyses = 1

NB! All analyse values are shown at the end of the printout.:

Analyse Results

from

Deposit Area 4022 - 017 Hyttebekk

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#

TE0093.01 Dump 6650 -100 -100 30 30 3.0 10.0

------------------

Sample No. As* Cd* Mo* Sb* Bi* Cr* Mn* Fe% W*

TE0093.01 -100 -10.0 -10.00 -10 -100 30 1000 5.96 -10

------------------

Sample No. Sr* P* Ca*

TE0093.01 70.0 0 15

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

Era:	Proterozoic	Period:
Genesis:	Hydrothermal breccia	Form:	Lens
Main texture:	Fracture filling	Min. distribution:	Disseminated (<20 % ore minerals)

	Province:	South Norwegian Basement Province
	Geotec.unit:	Telemark Supergroup
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Calcite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Major mineral (>10%)
Ore mineral	Bornite	Accessory mineral (<1%)

Relationship	Rock	Origin
Wall rock	Amphibolite	Intrusive Original rock :Dolerite
		Metamorphic facies :Amphibolite

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
TE0093.01	Dump	6650	-100	-100	30	30	3.0	10.0