Faktarka for <b>Registrering 1578

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	INDUSTRIMINERALDATABASEN
	Registrering 1578 - 304 Kallskardet
	(Objekt Id: 7868) (Sist oppdatert: 04.02.2004)

Lokalisering

Fylke:

Møre og Romsdal

Kommune:

Fjord (1578)

Kart 1:50000:

Tafjord (1319-3)

Kart 1:250000:

Ålesund

Koordinatsystem:

EU89-UTM Zone 32

Øst:

415952 m.

Nord:

6899468 m.

Lengdegrad:

7.3836860

Breddegrad:

62.2175870

Kartvisning

Ressurs

Ressurstype:

Olivin

Ressursundertype:

Olivin

Betydning

Råstoffbetydning:

Liten betydning (reg. 18.02.2015)

Ressurser og produksjon

	Aktivitet:	Prospektering	Reserver:
	Driftsmetode:		Historisk produksjon:

Mineralisering

Genese: Form:

Hovedtekstur: Min. fordeling:

Kornstørrelse:

Strøk/Fall: Retning:

Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

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Gruppe: Formasjon:

Mineralogi

Mineral Mengde

Olivin Hovedmineral (>90%)

Opplysning(er) i fritekstformat

Fri tekst

Forekomsten ligger oppe i Kallskardet, rett ovenfor Tafjord sentrum. Her opptrer en dunittisk bergart sammen med eklogitt. Denne lokaliteten er fredet p.g.a sin mineralogi.

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Brueckner, H.K. , 1977

A structural, stratigraphic and petrologic study of anorthosites, eclogites and ultramafic rocks and their country rocks, Tafjord area, western South Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.332;1-53 + pl sider

Abstrakt:

The Tafjord area of the central basal gneiss region contains Caledonized metamorphic rocks divided into two groups. The 1000 m.y. old Fetvatn Geniss is a homogeneous zone of granodioritic gneiss that was intruded as part of a large plutonic complex during the Sveconorwegian Cycle. The heterogeneous Vikvatn Sequence contains obvious metasedimentary and metavolcanic rocks and is comprised of the Øyen, Øvste Rødal and Svartegga groups. In addition, anothosite, eclogite and anhydrous peridotite occur within the Øyen and Øvste Rødal groups. The quartizite-rich Svartegga group may form the basal (Eocambrian) part of the Caledonian supracrustal sequence typical of the eastern basal gneiss region. The Øyen and Øvste Rødal groups would then be Precambrian metasedimentary sequences seperated from the Svartegga group by a major unconformity. Structures include two early generations (F1A og F1B) of east-plunging, reclined, isoclinal, similar folds. Later (F2) folds generally have a concentric geometry, disharmonic profiles and variable axes. The F1 and F2 fabrics are identical to stuctures in the eastern basal geniss region that are believed to have formed during the Caledonian orogeny; but the F1A fabric may be a heterogeneous assemblage of Precambrian structures that were homogenized (Caledonized) during the intense F1B deformation.

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