Norsk versjon
	THE ORE DATABASE
	Occurence 5035 - 025 Lånkkjølen
	(Object Id: 200) (Last updated: 16.02.2005)

Operations

	From - To	Activity	Comments
	1996 - 1996	Sampling	Company/Institution :NGU/Malmreg.

Mineralization

	Era:	Paleozoic	Period:
	Genesis:	Volcex	Form:
	Main texture:		Min. distribution:	Semi-massive (20-50 % ore minerals)

Main grain size:

Fine grained (< 1 mm)

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:	Støren Nappe
	Igneous complex:

Group:

Støren

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Ore mineral	Magnetite	Major mineral (>10%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Jasper	Sedimentary Original rock :Exhalite
			Metamorphic facies :Greenschist
	Wall rock	Greenschist	Extrusive Original rock :Tuff
			Metamorphic facies :Greenschist

Information(s) in free text format

Free text

I kanten av en liten oppstikkende blotning i myr er det en 5 x 2 m stor vannfylt og gjengrodd synk. Utilgjengelig. Fra tippen ses (finkornet) jaspis med semimassiv magnetitt (prøve 01).

Bibliography:

From NGU's Reference Archive:

Torske, Tore , 1965

	Geology of the Mostadmarka and Selbustrand area, Trøndelag.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.232;1-83 + ka pages

Abstract:

The bedrock of the area consists of metamorphic epiclastic, volcanic, and intrusive rocks of assumed Lower Ordovician age, assigned to, and lithologically matching the rocks of, the Røros, Støren and Lower Hovin Groups of the Trondheim Region. A detailed petrographic description of the rock varieties is given. The metamorphic grade of all rocks corresponds to the Greenschist Facies. - Small ore deposits occur in connection with the volcanic rocks. They comprise pyrite-pyrrhotite ores of the Leksdal Type, mixed pyrite-magnetite ores, and iron oxide ores. - Lithological variations of the sedimentary rocks is tentatively correlated with events during the early periods of the Caledonian Orogeny. - The volcanism within the area seems to have started with a phase of explosive activity, followed by extrusion (mostly submarine) of copious amounts of spilitic lavas; towards the end of the main period of volcanism a new episode of explosive activity has produced what is called the upper pyroclastic horizon, comprising rocks ranging from coarse volcanic breccia to finegrained tuffs. - The intrusive rocks consist mainly of saussurite gabbros and quartz keratophyres. The latter are thought to be intrusive rather than effusive, and evidence is offered to support this. In some places the character of pyroclastic material points to a quartz keratophyre parentage. Thus, quartz keratophyres may have occurred both as intrusive and volcanic rocks.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NT0203.01	Dump	Sampler: Wilberg/...Stored: Løkken Comment: Fine grained jasper with semi-massive magnetite mineralisation. No. of registrated element analyses = 1

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

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Analyse Results

from

Deposit Area 5035 - 025 Lånkkjølen

Element analyses

( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
NT0203.01	Dump	32	15	-3	1	49	-.3	2.0

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Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
NT0203.01	1.0	-1.0	-1.0	-2	-.2	9	-1.00	-2	2

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Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
NT0203.01	.09	27	47	1331	23.40	3.00	-5.00	-2	64.0

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Sample No.	La*	B*
NT0203.01	1.00	9

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The fact sheet was created on 20.04.2024

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