Fact Sheet for <b>Occurence 4003

					Norsk versjon
	THE ORE DATABASE
	Occurence 4003 - 049 Mastdalen
	(Object Id: 5599) (Last updated: 27.06.2022)

Location

County:

Telemark

Municipality:

Skien (4003)

Map 1:50000:

Nordagutu (1713-4)

Map 1:250000:

Skien

Coordinate system:

EU89-UTM Zone 32

(Coordinates NOT confirmed)

East:

523036 m.

North:

6570800 m.

Longitude:

9.4041940

Latitude:

59.2755040

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Mineralization

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Information(s) in free text format

Description

I følge Larsen (1993) finnes et betydelig antall større og mindre kvarts- og kalkspatlinser og -ganger i granittisk gneis med stedvise amfibolittbånd, i den østlige dalsiden i Stuverruddalen og videre sørover mot Mastdalen og Sandvika. Disse fører kvarts, kalkspat, sinkblende, blyglans, magnetitt, hematitt, kloritt og feltspat og har vært gjenstand for mutinger og undersøkelser en rekke ganger siden 1892. I perioden 1910-1915 utførte 1-2 mann 50-65 dagsverk pr år for å blottlegge og prøveta mineraliseringer. Det er blant annet sprengt ut en dagstrosse i 15 meters lengde i en bratt fjellside, og mindre røsker ved. Mineraliseringen er benevnt «Sølvgrube» på kart over Løvenskiold-Fossums eiendommer fra 1883. Foslie (1925) benevner denne for Valebø. Registreringen er flyttet fra EU89-UTM Zone 32 523019 6570892 til 32N 523036 6570800 27/6 2022 etter innspill fra C. Borchgrevink-Vigeland.

Bibliography:

From NGU's Reference Archive:

Larsen, Alf Olav , 1993

Gruver og skjerp i Skien.

;Forfatteren;BOK;72 s. pages

Foslie, Steinar , 1925

Syd-Norges gruber og malmforekomster.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.126;1-89 + ka pages

Abstract:

On the map accompanying this paper all the mines and ore deposits of Southern Norway are collected for the first time.The material has been gathered from printed and unprinted sources, communications from mining engineers and geologists, and through personal visits. Included are all mines and ore deposits of former, present and future importance. Among the 1407 deposits on the map, there are furthermore included all of doubtful value and many which are quite unworkable, but of geological interest, or those which mark the distribution of ore bearing formations. For this reason it has been necessary to mark the deposits with signs of different size. The object is only to facilitate a comprehensive view of the map, and is not an effort of economic classification, which for most of them would be quite impossible. The sizes refer to the presumed importance of the ore deposit, and has nothing to do with the extent of the mining operations. Mines and deposits out of work during the period 1913-1923 have been separately marked (see the legend), also deposits which were formerly of much greater importance than now. For the smallest mines and deposits no distinction has been made in these respects. Among them are represented partly those, which are in reality unworkable, partly those which are little investigated.

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