Faktarka for <b>Registrering 5603 - 305 Nordre Bumansfjord</b>

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	INDUSTRIMINERALDATABASEN
	Registrering 5603 - 305 Nordre Bumansfjord
	(Objekt Id: 14922) (Sist oppdatert: 24.02.2004)

Lokalisering

Fylke:

Finnmark

Kommune:

Hammerfest (5603)

Kart 1:50000:

Seiland (1835-1)

Kart 1:250000:

Hammerfest

Koordinatsystem:

EU89-UTM Zone 34

(Koordinatene IKKE bekreftet)

Øst:

575945 m.

Nord:

7817801 m.

Lengdegrad:

23.0342530

Breddegrad:

70.4542470

Kartvisning

Ressurs

Ressurstype:

Olivin

Ressursundertype:

Ultramafitt (uspes.)

Betydning

Råstoffbetydning:

Ikke vurdert (reg. 18.02.2015)

Mineralisering

Genese: Form:

Hovedtekstur: Min. fordeling:

Kornstørrelse:

Strøk/Fall: Retning:

Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

Æra: Periode:

Provins:

Geotek.enhet:

Tektonisk complex:

Intrusivt komplex:

Gruppe: Formasjon:

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Sturt, Brian A.; Speedyman, D.L.; Griffin, W.L. , 1980

The Nordre Bumandsfjord Ultramafic Pluton, Seiland, North Norway. Part I: Field relations.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.358;1 - 30 sider

Abstrakt:

The Nordre Bumandsfjord pluton consists of dunite, wehrlite and lherzolite. These rocks were intruded as magmas late in the Finnmarkian phase of the Caledonian orogeny. Field relations nad geochemistry show that the dominant primary magma was dunitic with ca. 40 wt % MgO; other ultramafic magma(s) was a final stage in the evolution of the very active mantle diapir responsible for the large volume of basic rocks comprising the Seiland Igneous Province.

Bennett, M.C.; Emblin, S.R.; Robins, B.; Yeo, W.J.A. , 1986

High-temperature ultramafic complexes in the North Norwegian Caledonides: I - Regional setting and field relationships.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.405;1-40 sider

Abstrakt:

Forkortet. Four major (25-100 km²) ultramafic complexes were developed in the Sørøy Nappe during the second phase of Finnmarkian deformation in the North Norwegian Caledonides. They were emplaced into layered mafic intrusions and show broadly similar emplacement histories and petrographic variations suggesting a related petrogenesis. The Nordre Bumannsfjord, Melkvann and Kvafjord group of ultramafic complexes developed in part by emplacement of both replacive and dilational ne-normative ultramafic sheets and dykes which progressively fragmented the layered olivine gabbro envelope. The Reinfjord ultramafic complex contains pronounced, subhorizontal modal layering and evidence of at least 3 major magmatic events. The intrusive sequences and petrographic variations represented in the complexes suggest the succesive emplacement of mantle-derived magmas with a diminishing number of liquidus phases, accompanied by in situ liquid-crystal fractionation, subsidiary hybridization and metasomatism.

	Provins:
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	Tektonisk complex:
	Intrusivt komplex: