Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Occurence 1867 - 301 Selvåg
	(Object Id: 7628) (Last updated: 11.10.2010)

Mineralization

	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:

Information(s) in free text format

Free text

Denne forekomsten ligger på vestsiden av Selvågen på Langøya i Vesterålen. Bergarten er en lagdelt gabbro med enkelte horisonter av pyroksenitt og websteritt. De olivinrike partiene har en mektighet på noen meter og er noen hundre m² i utgående. MgO-innholdet er også lavt, max 35 %. Dette gjør at denne forekomsten neppe er aktuell som olivinråstoff.

Bibliography:

From NGU's Reference Archive:

Vogt, Thorolf , 1910

	VI. Om eruptivbergarterne paa Langøen i Vesteraalen

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL; FOREDRAG;NGU; No.53;39 pages

Abstract:

Forkortet: Diese Abhandlung ist eine vorlaufige Mitteilung uber einige Gesteine, die auf einer Reise in Lofoten und Vesterålen im Sommer 1908 von dem Verfasser gesam- melt wurden. Die Gesteine Langøya werden besonders beruchsichtigt. Lofoten und Vesterålen bilden bekanntlich eine grosse Eruptionsprovinz (170 Km lang). In Lofoten treten hauptsachtlich Augitsyenit und Monzonit nebst etwas Labrador- felt auf; diese Eruptivgesteine werden hier von dem Granit umgegeben. Auf Langøya in Vesterålen, dessen eruptivgesteine fruher seht wenig erforscht sind, wird eine sehr vollstandige Differentiationsserie vorgefunden, mit einem gros- sen Reichtum von Gesteintypen. Es finden sich hier eine Reihe verschieder Gabbrovarietaten mit zugehørigem Peridotit, weiter Syenit und Monzonit mit Banatit, eine eigentumliche Serie von dioritischem Monzonit und Banatit, ferner Adamelitt, samt mehrerer Granittypen.

Heier, Knut S. , 1960

	Petrology and geochemistry of high-grade metamorphic and igneous rocks on Langøy, northern Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.207;1-246 + f pages

Abstract:

The rocks on Langøy have been considered as representing an igneous rock series including metamorphic sedimentary rocks of "Caledonian type". The present work shows that they are for the most part high-grade metamorphic rocks which are intruded by a few post metamorphic igneous rocks. The petrography of the rocks is discussed. They range in composition from ultrabasic to granitic. Rocks in the 50-60 per cent silica range predominate areally. The metamorphic rocks on Lagerøy are divided into: the banded series, the charnokite border series, the amphibolite facies veined gneises, porphyroblastic monzonitic granulites, old red granites, red augengneisses (ofmonzonitic composition), metasedimentary rocks, and diaphtoritic gneisses. The Eidet-Hovden intrusion, young red granites and the Bø gabbro are considered as post metamorphic igneous intrusions. The position of the anorthosite with associated monzonite east of Eidsfjorden is doubtful but may be related to the Eidet-Hovden intrusion. The metamorphic facies and mineral equilibria are discussed. A metamorphic boundary which separates amphibolite facies rocks to the east from granulite facies rocks to the west coincides along the strike with the observed thrust plane under the anorthosite east of Eidsfjorden.

Tveten, E. , 1978

	Svolvær. Berggrunnskart Svolvær M 1:250 000; trykt i farger

;Norges geologiske undersøkelse;KART;1 kart pages

	Abstract:
	Beskrivelsen finnes på kartet.

Priesemann, F.D.; Krause, H. , 1985

	The Selvåg deposit: a proterozoic magmatic Fe-Ti-V occurrence on Vesterålen, Northern Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.402;51-64 pages

Abstract:

The Selvåg Fe-Ti-V deposit is hosted by the Eidet-Hovden layered intrusion situated within the Precambrian Lofoten-Vesterålen province. The igneous complex is of olivine-tholeiitic affinity and shows a strong iron-enrichment trend. The deposit lies within the upper ore horizon (UZc) of the layered series. Faulting has resulted in two separate heterogenous ore bodies characterized by strong modal layering. The ore consists of titanomagnetite with ulvøspinel and ilmenite lamellae, ilmenite and sulphides. The mode of titanomagnetic relative to ilmenite show little variation in their compositions. The northern ore body contains the most valuable ore reserves with 44 Mt probable ore with about 25 wt.% V. The southern lens is of minor economic importance.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NGUAK96068	Bedrock	Comment: This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports No. of registrated oxide analyses = 1
	NGUHG96061	Bedrock	Comment: This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports No. of registrated oxide analyses = 1
	NGUHG96062	Bedrock	Comment: This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports No. of registrated oxide analyses = 1
	NGUHG96063	Bedrock	Comment: This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports No. of registrated oxide analyses = 1
	NGUHG96064	Bedrock	Comment: This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports No. of registrated oxide analyses = 1

NB! All analyse values are shown at the end of the printout.:

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Analyse Results

from

Deposit Area 1867 - 301 Selvåg

Oxide analyses

( All values are in % )

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
NGUAK96068	Bedrock	40.90	6.09	0.00	19.60	0.24	26.50	4.05
NGUHG96061	Bedrock	42.00	14.88	0.00	8.80	0.10	19.50	6.90
NGUHG96062	Bedrock	37.00	2.16	0.00	17.40	0.22	34.90	1.30
NGUHG96063	Bedrock	37.20	2.11	0.00	17.00	0.20	35.60	1.47
NGUHG96064	Bedrock	35.70	1.66	0.00	16.40	0.19	34.40	1.17

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Sample No.	Na2O	K2O	P2O5	Loss	Sum
NGUAK96068	1.00	0.14	0.00	1.98	101.00
NGUHG96061	1.60	0.19	0.00	6.36	100.00
NGUHG96062	0.33	0.06	0.00	7.04	100.00
NGUHG96063	0.32	0.04	0.00	7.08	101.00
NGUHG96064	0.16	0.03	0.00	9.87	100.00

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The fact sheet was created on 27.04.2024

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