Faktarka for Forekomstområde 815

					English version
	INDUSTRIMINERALDATABASEN
	Forekomstområde 815 - 333
	(Sist oppdatert 06.jun.2025)

Navn på deposit area : Gressholmen

(Objekt Id : 0815,333,00,00)

Lokalisering

Fylke :

Telemark (08)

Kommune :

Kragerø (0815)

Kart 1:50000:

Kragerø (1712-4)

Kart 1:250000:

Arendal

Markeringspunkt:

Lengdegrad:

9.4994630

Breddegrad:

58.9172030

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

528763 m.

Y-koord:

6530939 m.

Materialtype

Hovedtype:

Feltspat

Subtype:

Pegmatittisk feltspat

Production

Activity:	Prøvedrift	Reserves:
Prod. method:	Dagbrudd	Production:
Prod. status:	Nedlagt	Volume of dump:

Betydning

Offentlig: Not Assessed (reg. 18.02.2015)

Economical: Ikke vurdert

Products

Element/product Crude ore grade or quality

PEGFEL %

Operations

From - To Activity Comments

Test mining

Mineralization

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Stratigraphic classification of host rock

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Opplysning(er) i fritekstformat

Fri tekst

Gressholmen er en liten øy nord for Langøy. Her er det lasteplass for skip flere steder. Pegmatitten her inneholder mye skriftgranitt, og er hovedsakelig av kalinatronfeltspat. Det har bare vært små prøvedrifter her og aldri regulær drift. Ref.: Andersen

Bibliography:

From NGU's Reference Archive:

Andersen, Olaf , 1931

Feltspat II. Forekomster i fylkene Buskerud og Telemark, i flere herreder i Aust-Agder og i Hidra i Vest-Agder.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.128B;1-109 pages

Abstract:

Summary s. 151. Feldspar deposits in Southern Norway. (Feltspat II by Olaf Andersen and Feltspat III by Tom F.W. Barth) A few years ago one of the writers published a general outline of the properties, mode of occurrence, exploitation and uses of feldspar with special reference to the Norwegian feldspar industry (Olaf Anderesn, Feltspat I, Norges geologiske undersøkelse, Nr. 128A, 1926). To that publication the reader is referred for general in- formation regarding the feldspar industry of Norway. In the present publi- cation brief descriptions are given of 262 individual feldspar deoposits, all situated in the part of Southern Norway that extends, generally in a rather narrow zone, along the coast westward from the neighbourhood of Kragerø to the island Hidra near Flekkefjord. The deposita described lie in the counties Buskerud, Telemark, Aust-Agder and Vest-Agder, and are distributed over a large number of local districts (herreder). The most important districts at present are those in the neighbourhood of Kragerø ((Bamble, Skåtøy and Sannidal), those along the coast between Risør and Arendal (especially Søndeled, Holt and Froland), and the two districts north of Kristiansand (Iveland and Evje). Each description contains information about the dimensions and general attitude of the pagmatite body and the feldspar.

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