Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Deposit Area 1833 - 302
	(Last updated 26.mar.2019)

Importance

Public:

Not Assessed (reg. 18.02.2015)

Economical:

Not classified/evaluated

Mineralization

	Era:		Period:
	Dating:		Method:
	Genesis:	Regional metamorphic	Form:	Layer
	Main texture:	Schistose	Min. distribution:	Irregular (scattered)

Main grain size:

Medium grained (1-3 mm)

	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	Quartz
	Not defined	Opaque
	Not defined	Apatite
	Not defined	Biotite
	Not defined	Muscovite
	Not defined	Calcite
	Not defined	Kyanite	Major mineral (>10%)

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Primary layering		Post-mineralisation

Information(s) in free text format

Free text

B. L.: Ved befaring høsten -93. var det ikke mulig å finne denne registreringen. Lokaliteten er beskrevet av Jens A. W. Bugge i NGU-publikasjon nr.171 (1948). I. L.: Ligger like ved Storforshei. Er knyttet til sedimentene nær jernmalmene i Dunderland. Det er sannsynligvis en kyanitt - granat - glimmerskifer. Diskutert forekomsten med Ulrik Søvegjarto. Han kjenner ikke til kyanitt i denne enheten som er i Rana gruvers gruveområde. Kyanitt må i så fall være aksessorisk i forbindelse med kvartsutsvetninger. Konklusjon: Forekomsten har ikke noen økonomisk verdi ut fra det som er kjent.

Bibliography:

From NGU's Reference Archive:

Bugge, Jens A.W. , 1948

	Rana gruber. Geologisk beskrivelse av jernmalmfeltene i Dunderlandsdalen.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.171;1-149 + f pages

Abstract:

(forkortet) The mining company A/S Rana Gruber has made extensive exploration of the iron ore deposits in Dunderlandsdalren under the leadership of mining engineer Worm Lund and. The field work comprises the following sections: Geodetic works and constructions of topographic maps. - Geology. - Exploration of the ore deposits by diamond drilling. - Exploration of the ground above the solid rocks (for foundation). The present paper gives and outline of the geology. Map 1 illustrates the main geological features of Rana. The sedimenatary rocks belong to the lower part of the sediments of the Caledonian mountain range. They are older than the fossil-bearing Sulitjelma-schists described by Th. Vogt, and are probably of lower Ordovician or Upper Cambrianage age. The most characterisitctic features in the western part of the area illustrate d in map 2 are the graeat folds in with axes striking E-W and dipping 10-20 W There are two anticlinededs seperated by syncline. The northern Bomfjell- anticline is superseded toward south by the Svanheim-syncline and this again by the Nevernes-Lasken anticline. Toward east the fold axes turn from E-W to NNE -SSW, while the pitch varies between NE and SW. The compression of the rocks is higher in the eastern parts than in the western ones.

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The fact sheet was created on 22.11.2024

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