Norsk versjon
	THE ORE DATABASE
	Deposit Area 438 - 016
	(Last updated 08.mai.2006)

Importance

Public:

Little Importance (reg. 18.02.2015)

Economical:

Minor interest

Operations

	From - To	Activity	Comments
		Pitting	Company/Institution :?
	1998 - 1998	Sampling	Company/Institution :NGU mineralressurser

Mineralization

	Era:	Paleozoic	Period:	Ordovician
	Dating:		Method:
	Genesis:	Unknown	Form:
	Main texture:	Structureless	Min. distribution:

Main grain size:

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

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

Group:

Gula Group

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Muscovite	Major mineral (>10%)
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Garnet	Subordinate mineral (1-10%)
	Gangue mineral	Chlorite	Subordinate mineral (1-10%)
	Gangue mineral	Graphite	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)

Lithology:

	Relationship	Rock	Origin
	Host rock	psammittic qz-musc. schist	Sedimentary Original rock :Greywacke
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :101 / 52	Post-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

Skjerpet ligger på sørsiden, men nær toppen av Lomnesvola, ca 1000 m.o.h. Det består av en liten røskegrop, ca. 3 x 3 m i omriss og inntil 2 m dyp. Det er også en mindre røsk 6-7 m mot nordøst, ca. 2 m lang, 1 m bred og 1 m dyp. Mineraliseringen er svært fattig og består av enkelte spredte magnetkis- aggregater og tynne bånd med meget svak impregnasjon i form av streker med magnetkis. Mineraliseringen opptrer i en 2-2.5 m mektig kvartsittsone. Kvartsitten er båndet og består av grafittrik kvartsitt i heng som går over i granatholdig sericittisk kvartsitt mot ligg. Anhedrale granater opptrer tildels anriket i enkelte 1-2 cm tykke bånd i form av opptil 2-3 mm store korn. Sidebergart er psammittisk kvarts-muskovittskifer.

Bibliography:

References not to be found in NGU's Reference Archive.:

Elizabeth A. McClellan, 1995: Subduction-related volcanism in the Gula Nappe, southeastern Trondheim Nappe Complex, Central Norway. Norges geologiske undersøkelse Bulletin 428, p.1-26.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	HE0053.01	Bedrock	Sampler :T. Bjerkgård/...Stored :Løkken/...Size(kg) :3 Comment :Graphitic quartzite with few streaks of pyrrhotite. Some thin garnetiferous bands. From wall of main pit. No. of registrated element analyses = 1
	HE0053.02	Dump	Sampler :T. Bjerkgård/...Stored :Løkken/...Size(kg) :3 Comment :Graphite-bearing sericitic quartzite. Few mm-thick bands with pyrrhotite. 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 438 - 016 Lomsjøen

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#
HE0053.01	Bedrock	142	97	8	45	95	.3	1.0
HE0053.02	Dump	421	54	8	34	103	.3	3.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	V*
HE0053.01	4.0	3.0	234	.2	8	10.00	-3	-3	159
HE0053.02	5.0	1.0	5	.7	4	5.00	-3	-3	47

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Sample No.	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*	B*
HE0053.01	33	871	2.88	10.00	8.00	-2	62.0	24.00	-3
HE0053.02	18	611	8.26	18.00	-8.00	-2	47.0	46.00	6

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The fact sheet was created on 16.01.2025

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

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