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	THE ???? DATABASE
	Occurence 0 - 000 FEIL
	(Object Id: ) (Last updated: 04.10.2017)

Products

	Element/product	Crude ore grade or quality	Reg. date
	Fe-mag.	10 %	06.01.1993
	Fe-total	37 %	06.01.1993

Operations

	From - To	Activity	Comments
	1969 - 1969	Geology	Company/Institution :Rana Gruber
	1970 - 1970	Geophysics	Company/Institution :Rana Gruber

Mineralization

	Era:	Proterozoic	Period:	Neoproterozoic
	Genesis:	Sedex	Form:	Layer
	Main texture:	Banded	Min. distribution:	Massive (>50 % ore minerals)

Main grain size:

Coarse grained (> 3 mm)

Main alteration:

	Strike/Dip:	120 / 50	Direction:	290
			Plunge:	30

Stratigraphic classification of host rock

Era:

Proterozoic

Period:

Neoproterozoic

	Province:	Caledonides
	Geotec.unit:	Rødingsfjell Nappe Complex
	Tectonic complex:	Midtre allokton
	Igneous complex:

Group:

Ørtfjell-gruppen

Formation:

Dunderland jernformasjon

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Chlorite	Subordinate mineral (1-10%)
	Gangue mineral	Calcite	Subordinate mineral (1-10%)
	Gangue mineral	Oligoclase	Subordinate mineral (1-10%)
	Gangue mineral	Epidote	Subordinate mineral (1-10%)
	Gangue mineral	Apatite	Subordinate mineral (1-10%)
	Gangue mineral	Muscovite	Subordinate mineral (1-10%)
	Gangue mineral	Biotite	Subordinate mineral (1-10%)
	Gangue mineral	Amphibole	Subordinate mineral (1-10%)
	Gangue mineral	Garnet	Accessory mineral (<1%)
	Gangue mineral	Pyrite	Accessory mineral (<1%)
	Ore mineral	Magnetite	Major mineral (>10%)
	Ore mineral	Hematite	Major mineral (>10%)

Lithology:

	Relationship	Rock	Origin
	Unknown	Amfibolitt	Extrusive Original rock :Basalt
			Metamorphic facies :Amphibolite
	Unknown	Lys glimmerskifer	Sedimentary Original rock :Greywacke
			Metamorphic facies :Amphibolite
	Unknown	Karbonatglimmersk.	Sedimentary Original rock :Argillaceous sediment
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Primary layering	Strike/Dip :120 / 50	Syn-mineralisation ;...Effect :None
	Unknown	Foliation		Syn-mineralisation ;...Effect :None
	Unknown	Fold axis		Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Nevernes mt.-hem.malmfelt -------------------------------------- ligger i luftlinje 1,4 km SV for Nevernes kirke 360 m.o.h. i nordhellingen av Langfjell. Hovedforekomsten (vest for Kvernbekken), innenfor et 600 x100m stort område, består av 3 hovedmalm-lag for det meste 7-20 m tykke, men tett sammenfoldet innenfor 100 meters bredde. Strøket er overveiende N70°V med et generelt fall 40° mot sør. Selve feltet danner en 120 m bred hylle i dalsiden som er ganske myrlendt. I malmblotningene ser man både grovbladet hematittmalm og grovkornet ren magnetittmalm, og det er observert 10 cm granatfels. Man har ingen kjemiske malm-analyser, men gehalten anslås til: 35 - 40 % Fe-total og 10 % Fe-magn. Et overslag på brytbar malm i et 500 m langt og opptil 70 m dypt dagbrudd med gråberg/malm i forholdet 1/1 gir 3.9 mill. tonn ned til nivå 290. Med råmalmgehalt 37 % Fe-total og 10 % Fe-magn. er forholdet hem./mt.=73/27=2,7. Mineralogisk har forekomsten følgende sammensetning: 35,7 % hematitt, 13,8 % magnetitt, 28,8 % kvarts, 4,8 % epidot, 6,0 % kalkspat, 3,0 % kloritt, 3,2 % amfibol, 1,0 % oligoklas, 1,0 % biotitt, 1,0 % muskovitt, 1,3 % apatitt, 0,1 % granat, 0,1 % svovelkis.

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.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0617.02	Bedrock	Sampler: Wilberg, R./...Stored: Løkken Comment: Amfibolitt med mt + py. No. of registrated element analyses = 1

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

Name of Sample point: Prøvepunkt 1

(Object Id: 4108 53,00,01)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Storforshei (2027-4)

Map 1:250000:

Mo i Rana

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

479900 m.

North:

7361370 m.

Longitude:

14.5506440

Latitude:

66.3696250

Show on map

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron
			Element(s):	Fe

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0617.01	Bedrock	Sampler: Wilberg, R./...Stored: Løkken Comment: Fink., massiv mt. No. of registrated element analyses = 1

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

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The fact sheet was created on 06.05.2024

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