Fact Sheet for Deposit Area 833

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 833 - 048
	(Last updated 28.mar.2020)

Name of Deposit Area : Stemmetjønn

(Object Id : 0833,048,00,00)

Location

County :

Telemark (08)

Municipality :

Tokke (0833)

Map 1:50000:

Bandak (1513-1)

Map 1:250000:

Skien

Marking point:

Longitude:

8.1341970

Latitude:

59.3933330

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

450827 m.

Y-coord:

6584170 m.

Commodity

	Main Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Sub Type:	Copper
			Element(s):	Kis Cu

Production

Activity:	Mining	Reserves:
Prod. method:	Open pit mining	Production:
Prod. status:	Disused, closed	Volume of dump:

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 17.des.2007 by Terje Bjerkgård)

Historical: No , (Confirmed 17.des.2007 by Terje Bjerkgård)

Operations

From - To Activity Comments

1910 Regular production Company/Institution :Kristiania Minekompani

Mineralization

Era: Proterozoic Period: Neoproterozoic

Dating: Method:

Genesis: Hydrothermal vein Form:

Main texture: Min. distribution: Irregular (scattered)

Main grain size: Very unevenly grained Main alteration:

Strike/Dip: 80 / 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: Bandak Group Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Muscovite Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Wall rock Granite Intrusive
Original rock :Granite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Host rock Hydrothermal vein Strike/Dip :85 / 70 Syn-mineralisation

Information(s) in free text format

Free text

Denne forekomsten befinner seg i en skrent på sørsiden av Stemmetjønn. Den er lett tilgjengelig i veikanten inn til ei hytte ved vannet. Tippmaterialet ligger i vannkanten. Det er drevet en 25 m lang skjæring i øst-vest retning (080 grader), 3-4 m bred og inntil 6-7 m dyp. En ca. 10 m lang skjæring fra veien leder inn i hoveddriften. Mineraliseringen består uregelmessige slirer og aggregater av kobberkis tilknyttet tynne (~5 cm) kvartslinser og ¿slirer. Kvartsårene opptrer parallell skjæringen (retning 080/75). I tillegg til kvarts er det også assosiert noe feltspat og grønnlig muskovitt. Det er ingen litteratur om forekomsten, men det er nærliggende å tro at den var i drift samtidig med forekomstene på Kløvereidnuten, dvs. i 1910 +/- 5 år. Den er avmerket på Østlyngens kart fra 1907.

Bibliography:

From NGU's Reference Archive:

Østlyngen, K. , 1907

Bandaksli. Plankart over malmsoner

;Norges geologiske undersøkelse;KART;Bergarkivet; No.K 7

Fieldsamples

Sample No. Sample type Miscellanrous

TE0321.01 Dump

Sampler :Terje Bjerkgård

Comment :Kobberkis i kvarts, feltspat og grønnlig muskovitt

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 833 - 048 Stemmetjønn

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#

TE0321.01 Dump 11790 -100 -100 -10 -10 12.0 10.0

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

Sample No. Pt# Pd# As* Cd* Mo* Sb* Bi* Cr* Mn*

TE0321.01 -10.0 -10.0 -100 -10.0 80.00 -10 -100 -10 400

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

Sample No. Fe% W* Sr* Na* Mg* Al* P* Ca* Hg*

TE0321.01 1.34 -10 30.0 100 400 4900 490 7200 -10

	From - To	Activity	Comments
	1910	Regular production	Company/Institution :Kristiania Minekompani

Era:	Proterozoic	Period:	Neoproterozoic
Dating:		Method:
Genesis:	Hydrothermal vein	Form:
Main texture:		Min. distribution:	Irregular (scattered)

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

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Muscovite	Major mineral (>10%)
Gangue mineral	Feldspar	Major mineral (>10%)
Ore mineral	Chalcopyrite	Major mineral (>10%)

	Relationship	Rock	Origin
	Wall rock	Granite	Intrusive Original rock :Granite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Hydrothermal vein	Strike/Dip :85 / 70	Syn-mineralisation

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
TE0321.01	Dump	11790	-100	-100	-10	-10	12.0	10.0

Sample No.	Pt#	Pd#	As*	Cd*	Mo*	Sb*	Bi*	Cr*	Mn*
TE0321.01	-10.0	-10.0	-100	-10.0	80.00	-10	-100	-10	400

Sample No.	Fe%	W*	Sr*	Na*	Mg*	Al*	P*	Ca*	Hg*
TE0321.01	1.34	-10	30.0	100	400	4900	490	7200	-10