Norsk versjon
	THE ORE DATABASE
	Deposit Area 1644 - 042
	(Last updated 08.nov.2023)

Importance

Public:

Not Assessed (reg. 18.02.2015)

Economical:

Not classified/evaluated

Operations

	From - To	Activity	Comments
	1997 - 1997	Sampling	Company/Institution :NGU

Mineralization

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

Main grain size:

Fine grained (< 1 mm)

Main alteration:

Chloritisation

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

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

Group:

Aursund

Formation:

Røsjø

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Biotite	Major mineral (>10%)
	Gangue mineral	Amphibole	Major mineral (>10%)
	Gangue mineral	Chlorite	Subordinate mineral (1-10%)
	Gangue mineral	Quartz	Subordinate mineral (1-10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Arsenopyrite	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Sandstone	Sedimentary Original rock :Greywacke
			Metamorphic facies :Greenschist
	Wall rock	Biotite-chlorite schist	Sedimentary Original rock :Greywacke
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :244 / 35	Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Skjerpet ligger i åpent terreng på toppen av en sørvendt brattskrent. Rester ettter taubanen fra Kjøli gruver sees i bunnen av skrenten. Det består av en røsk med sider 4 x 2 m i et stort sett overdekket område. Nord for skjerpet, i heng finnes grågrønn sandstein og i ligg grå sandstein med foliasjon 245°/35.° Mellom disse er en ca. 1 m mektig sone med biotitt-kloritt skifer. Det er lite sulfidmineralisering å se i skjerpet, men på tippen finnes en utskeida malmhaug på ca. 5 m3. Sulfidmineraliseringen består i hovedsak av kobberkis-arsenkis-pyritt årer og aggregater i biotitt-, kloritt- og amfibolrik bergart. Dette er den klart mest As-rike mineralisering som er påvist i Menna-Kjøli feltet.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	JS97008	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :cpy-apy årer/strenger/aggregater, rik min., i skifrig, biotitt-kloritt-kvarts bergart. No. of registrated element analyses = 1
	JS97009	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :cpy-apy-py+po diss./strenger/aggregater i amfibolrikrik bergart. Tydelig bleking rundt sulfidaggregatene. No. of registrated element analyses = 1
	399804	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	399805	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1

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

Name of Sample point : Jensåsbekken vest

(Object Id : 1644,042,00,01)

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Location

County :

Sør-Trøndelag (16)

Municipality :

Holtålen (1644)

Map 1:50000:

Ålen (1720-4)

Map 1:250000:

Røros

Marking point:

Longitude:

11.5726660

Latitude:

62.8481090

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

630963 m.

Y-coord:

6971282 m.

Commodity

	Main Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Sub Type:	Copper
			Element(s):	Cu As

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	399803	Bedrock	Sampler :MINDEX ASA 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 1644 - 042 Jensåsbekken

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#
JS97008	Dump	62144	2223	6	390	229	27.8	602.0
JS97009	Dump	37818	3313	22	579	217	17.2	469.0
399803	Bedrock	12000	941	45	175	82	2.1	19.0
399804	Dump	5483	481	45	456	101	1.0	28.0
399805	Dump	69000	582	164	144	36	2.3	36.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
JS97008	2.0	4.0	37481	3.1	28	3.00	23	5	11.42
JS97009	-1.0	5.0	54116	4.5	4	3.00	21	22	5.86
399803			7	.2	19	8.00	3	3
399804			3	.1	4	11.00	3	3
399805			3	2.1	28	10.00	3	3

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Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
JS97008	56	58	898	18.13	8.00	-8.00	-2	3.0	6.00
JS97009	109	155	1575	19.72	11.00	-8.00	8	4.0	13.00
399803	51	76	363	10.00				4.0	5.00
399804	17	136	231	10.00				4.0	2.00
399805	38	241	471	17.50				6.0	4.00

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Sample No.	B*	Ti*
JS97008	-3
JS97009	-3
399803		1200
399804		500
399805		1100

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The fact sheet was created on 19.05.2024

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

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