Faktarka for Forekomstområde 904

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	INDUSTRIMINERALDATABASEN
	Forekomstområde 904 - 312
	(Sist oppdatert 07.okt.2025)

Navn på deposit area : Rivingen

(Objekt Id : 0904,312,00,00)

Lokalisering

Fylke :

Aust-Agder (09)

Kommune :

Grimstad (0904)

Kart 1:50000:

Høvåg (1511-2)

Kart 1:250000:

Arendal

Markeringspunkt:

Lengdegrad:

8.4705280

Breddegrad:

58.2448420

EU89-UTM Zone 32

(Coordinates NOT confirmed)

X-koord:

468917 m.

Y-koord:

6456091 m.

Materialtype

Hovedtype:

Karbonatmineraler

Subtype:

Kalk

Betydning

Offentlig: Not Assessed (reg. 18.02.2015)

Economical: Ikke vurdert , (Confirmed 25.feb.2014 by Agnes Raaness)

Products

Element/product Crude ore grade or quality

LIME %

Mineralization

Era: Period:

Dating: Method:

Genesis: Form:

Main texture: Min. distribution:

Main grain size:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period:

Province: South Norwegian Basement Province

Geotec.unit: Bamble Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Opplysning(er) i fritekstformat

Fri tekst

I følge Holtedahl (1917) består øya Rivingen sørvest for Homborøya av ulike soner av kalkstein. De fleste sonene er dog relativt urene og av liten mektighet. Stedevis er den iblandet glimmerskifer, hornblendeskifer og amfibolitt. Holtedahl (1916, 1917) anslår at de to reneste partiene utgjør omkring 7000 tonn.

Bibliography:

From NGU's Reference Archive:

Holtedahl, Olaf , 1917

II. Kalkstensforekomster paa Sørlandet.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.81;26 pages

Abstract:

In the present paper a description is given of the limestone-deposits of the Archean coast-region of southern Norway which, geologically, is very little studied. The majority of these deposits are found in the district shown in the accompanying map, where the limestone is marked by figures. The limestone belong to a sedimentary series, which is the oldest rock-system in this part of the country. Into this have been intruded large massives of granites and other igneous rocks, that together with crust movements have greatly altered the limestones. They are now more or less coarsely crystalline, often with minerals such as mica, quartz, augite, scapolite, as very frequent constituents, sometimes as fairly large, well developed crystals. The deposits are generally very small and a great many lie rather far into the country. The best situated ones, generally also showing the best quality of limestone, are found in some very small islands in the coast district between Grimstad and Lillesand. The chemical character of the limestone may be seen from analyses cited. Generally a rather large amount of amterial insoluable in hydrochloric acid is found, furthermore a fairly small amount of magnesia. The amount of calcium carbonate in the large quantity of the limestones is less than 90%. The practical use that can be made of these rocks is therefore generally very limited.

Holtedahl, Olaf , 1916

Uttalelse om kalksteinsforekomstene på øya Rivingen ved Lillesand

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 6064;4 pages

Abstract:

Øya Rivingen består av kalkstein av varierende kvalitet. De reneste partier danner to smale lag som utgjør omkring 7000 tonn. Det forurens- ende mineral er glimmer som finnes spredt gjennom hele feltet.

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

	Province:	South Norwegian Basement Province
	Geotec.unit:	Bamble Complex
	Tectonic complex:
	Igneous complex:

	Abstract:
	Øya Rivingen består av kalkstein av varierende kvalitet. De reneste partier danner to smale lag som utgjør omkring 7000 tonn. Det forurens- ende mineral er glimmer som finnes spredt gjennom hele feltet.