Faktarka for Forekomstområde 815

					English version
	INDUSTRIMINERALDATABASEN
	Forekomstområde 815 - 336
	(Sist oppdatert 06.jun.2025)

Navn på deposit area : Store Furuholmen

(Objekt Id : 0815,336,00,00)

Lokalisering

Fylke :

Telemark (08)

Kommune :

Kragerø (0815)

Kart 1:50000:

Kragerø (1712-4)

Kart 1:250000:

Arendal

Markeringspunkt:

Lengdegrad:

9.5325210

Breddegrad:

58.9239720

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

530661 m.

Y-koord:

6531708 m.

Materialtype

Hovedtype:

Feltspat

Subtype:

Pegmatittisk feltspat

Production

Activity:	Gruvedrift	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 %

Mineralization

Era: Period:

Dating: Method:

Genesis: Form:

Main texture: Min. distribution:

Main grain size:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Not defined Potassic feldspar Major mineral (50-90%)

Opplysning(er) i fritekstformat

Fri tekst

På sydsiden av Store Furuholmen ble det utvunnet kvarts og feltspatblanding (tint). Det var lasteplass for skip ved bruddet. Det er hovedsakelig kalinatronfeltspat ved dette bruddet. Pegmatitten er en steiltsående gang med største bredde på omkring 50 m i bruddområdet. Bruddet er 150 m langt.

Beliggenhet

På sydsiden av øya Store Furuholmen som ligger nord for Langøy ved Bamlekysten

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.

	Era:		Period:
	Dating:		Method:
	Genesis:		Form:
	Main texture:		Min. distribution:

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

	Relationship	Mineral	Amount
	Not defined	Potassic feldspar	Major mineral (50-90%)