English version
	MALMDATABASEN
	Forekomstområde 1644 - 031
	(Sist oppdatert 07.nov.2023)

Betydning

Offentlig:

Not Assessed (reg. 18.02.2015)

Economical:

Ikke vurdert

Operations

	From - To	Activity	Comments
	1904 - 1906	Test mining	Company/Institution :The Kjøli Mines Ltd.
	1912 - 1912	Test mining	Company/Institution :Verstrate & Flis
	1997 - 1997	Sampling	Company/Institution :NGU

Mineralization

	Era:	Paleozoic	Period:	Ordovician
	Dating:		Method:
	Genesis:	Vulkeks	Form:	Linse
	Main texture:	Båndet	Min. distribution:	Massiv

Main grain size:

Finkornet (<1 mm)

Main alteration:

Ingen sidestensomvandling

	Strike/Dip:	235 / 30	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	Quartz	Major mineral (>10%)
	Gangue mineral	Chlorite	Major mineral (>10%)
	Gangue mineral	Amphibole	Major mineral (>10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Galena	Subordinate mineral (1-10%)
	Ore mineral	Sphalerite	Subordinate mineral (1-10%)
	Ore mineral	Magnetite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Sandstein	Sedimentary Original rock :Greywacke
			Metamorphic facies :Greenschist
	Wall rock	Fyllitt	Sedimentary Original rock :Argillaceous sediment
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Schistosity	Strike/Dip :185 / 15	Post-mineralisation ;...Effect :Modifies
	Wall rock	Foliation	Strike/Dip :190 / 50	Post-mineralisation ;...Effect :Modifies

Opplysning(er) i fritekstformat

Fri tekst

Forekomsten er også kallt Midtgruben eller Jensgruben og ligger ca. 2 km nordøst for Kjøli gruve. Flere, mindre synker og skjerp som er vannfyllte finnes over en lengde på ca. 150 m på sørøstsida av en markert kolle som turistløypa mellom Kjølihytta og Stuggudalen går over. Forekomsten var i eldre tid drevet av Selbo Kobberverk, og mindre forsøksdrift ble gjort tidlig på 1900-tallet samtidig med driften av Kjøli gruver. Strøkretningen på bergartene ved hovedsynken er omtrent NNØ-SSV med fall ca. 30° mot VNV. Synken skal være drevet ca. 20 m nedover langs fallet (Aasgaard 1927). I SV-veggen av denne sees en ca. 20 cm mektig malmsone som ligger i fyllittisk skifer nær kontakten til oveliggende mer massiv, grågrønn meta-arenitt. To hovedtyper av sulfidmalm er påvist; Magnetkis-kobberkis breksjemalm med kvartsøyne og grønne bergartsfragmenter og fint båndet, massiv pyritt-kobberkis-sinkblende malm. Malmtypene opptrer i kontakt med hverandre. Massiv magnetkis-kobberkis malm er også blottet i andre små skjerp SV for synken. I følge Rui & Bakke (1975) kan tynne soner (2-25 cm) med sulfidmineralisering følges mer eller mindre kontinuerlig fra Midtgruben til Kjøli gruver.

Bilde(r) fra forekomstområdet:

Photo no. 1 showing Rundhaugen (Midtgruben)"

Bibliography:

From NGU's Reference Archive:

Aasgaard, Gunnar , 1927

	Gruber og skjerp i kisdraget Øvre Guldal-Tydal.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.129;1-196 pages

Abstract:

The occurences described in this paper form a connection between th mining districts around Røros to the south and those around Meråker to the north. The occurences lie in mountain regions partly above the forest line. The list on page 12 contains the names of all known occurrences of whatever size within the district considered. Pl. I is a geological outline map of the district, compiled from maps in the Norwegian Geological Survey. In a geological summary on pages 18-27 it is shown that no pyrite occurrences of economic importance so far have been found in an eastern zone along the Swedish boundary where the rocks consist of hard schist with sparagmites, and igneous rocks. Neither have such occurrences been found in a zone of "Stuedalsskifer" and an other zone of "Gulaskifer" towards west, both indicated on the map. The occurrences of pyrite are chiefly found in connection with fine grained, light green or gravish, partly feldspar bearing schist and in connection with green schists, mostly fine grained hornblende schists. All these zones of schist gnereally strike north and dip west. The pyrite bearing schist lie on both sildes of a large zone of igneous rocks extending from Kjølifjell in the south over Hyllingen and Melshogna to Fangen in the Meråker district in the north.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0222.02	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :po-cpy breksjemalm, finkornet, cpy rike aggregater, amfibolrike og grønne fragmenter. No. of registrated element analyses = 1
	ST0222.03	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :py-cpy-sl+mt malm, massiv, finkornet, fint båndet No. of registrated element analyses = 1
	ST0222.04	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :cpy-sl-po malm, fin-middelsk. i og rundt kvartsknoller (cm-skala) i klorittskifer. No. of registrated element analyses = 1
	ST0222.05	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :py og po min., dels noe cpy, massiv (samleprøve). No. of registrated element analyses = 1
	399812	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	399813	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	399814	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	399815	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	399816	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	399817	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1

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

Navn på locality : Rundhaugen

(Objekt Id : 1644,031,01,00)

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Lokalisering

Fylke :

Sør-Trøndelag (16)

Kommune :

Holtålen (1644)

Kart 1:50000:

Ålen (1720-4)

Kart 1:250000:

Røros

Markeringspunkt:

Lengdegrad:

11.6619790

Breddegrad:

62.8738010

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

635389 m.

Y-koord:

6974328 m.

Materialtype

	Hovedtype:	Basemetaller (Cu,Zn,Pb,Fe sulfider,As,Sb,Bi,Sn)	Subtype:	Kobber
			Element(s):	Cu Fe Kis

Production

	Activity:	Røsking	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Amphibole	Major mineral (>10%)
	Gangue mineral	Chlorite	Major mineral (>10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Magnetite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Phyllite	Sedimentary Original rock :Greywacke
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Schistosity	Strike/Dip :238 / 50	Post-mineralisation ;...Effect :Modifies
	Wall rock	Fold axis	Dir./Plunge :325 / 25	Post-mineralisation ;...Effect :Modifies

Opplysning(er) i fritekstformat

Fri tekst

Små, vannfyllte skjerp finnes NØ for et lite tjern og ca. 150 m SV for hovedsynken. Berggrunnen domineres av fyllittisk skifer, men malmsonen er ikke blottet. På tippen sees massiv magnetitt med tynne bånd og disseminasjon av pyritt.

Bibliography:

From NGU's Reference Archive:

Aasgaard, Gunnar , 1927

	Gruber og skjerp i kisdraget Øvre Guldal-Tydal.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.129;1-196 pages

Abstract:

The occurences described in this paper form a connection between th mining districts around Røros to the south and those around Meråker to the north. The occurences lie in mountain regions partly above the forest line. The list on page 12 contains the names of all known occurrences of whatever size within the district considered. Pl. I is a geological outline map of the district, compiled from maps in the Norwegian Geological Survey. In a geological summary on pages 18-27 it is shown that no pyrite occurrences of economic importance so far have been found in an eastern zone along the Swedish boundary where the rocks consist of hard schist with sparagmites, and igneous rocks. Neither have such occurrences been found in a zone of "Stuedalsskifer" and an other zone of "Gulaskifer" towards west, both indicated on the map. The occurrences of pyrite are chiefly found in connection with fine grained, light green or gravish, partly feldspar bearing schist and in connection with green schists, mostly fine grained hornblende schists. All these zones of schist gnereally strike north and dip west. The pyrite bearing schist lie on both sildes of a large zone of igneous rocks extending from Kjølifjell in the south over Hyllingen and Melshogna to Fangen in the Meråker district in the north.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0222.01	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :mt-py malm, massiv, finkornet mt, diss./bånd av py dels middelskornet. 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

Forekomstområde 1644 - 031 Rundhaugen

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#
ST0222.01	Dump	8588	112	21	299	7	.8	144.0
ST0222.02	Dump	42115	9184	680	269	24	17.4	1317.0
ST0222.03	Dump	36443	21519	1881	219	16	15.1	203.0
ST0222.04	Dump	41873	11847	561	61	18	13.5	457.0
ST0222.05	Dump	31171	3723	475	286	19	13.3	580.0
399812	Dump	16000	5104	655	227	17	5.6	312.0
399813	Dump	1296	53000	1497	266	67	8.7	341.0
399814	Dump	15000	35000	472	175	28	6.5	142.0
399815	Dump	28000	6597	452	293	72	7.1	131.0
399816	Dump	40000	1433	383	316	23	9.9	104.0
399817	Dump	9830	447	46	57	7	1.8	60.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0222.01	3.0	2.0	26	-.2	3	3.00	-3	44	3.05
ST0222.02	1.0	-1.0	107	30.9	2	1.00	15	69	32.07
ST0222.03	1.0	1.0	180	67.8	7	-1.00	6	109	44.18
ST0222.04	1.0	1.0	49	34.3	18	3.00	17	27	10.76
ST0222.05	1.0	2.0	111	10.6	7	1.00	10	45	33.62
399812			162	13.3	1	11.00	3	37
399813			195	87.9	12	16.00	3	75
399814			193	70.9	10	6.00	7	12
399815			52	44.9	13	14.00	3	3
399816			193	3.5	1	12.00	3	3
399817			12	.1	1	7.00	3	3

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Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0222.01	17	6	233	35.52	4.00	-8.00	-2	1.0	-1.00
ST0222.02	12	8	197	29.50	3.00	-8.00	-2	1.0	2.00
ST0222.03	6	16	282	29.94	3.00	-8.00	-2	7.0	-1.00
ST0222.04	43	50	336	15.92	3.00	-8.00	-2	3.0	5.00
ST0222.05	14	5	178	27.86	3.00	-8.00	-2	2.0	1.00
399812	1	31	299	10.00				9.0	0.50
399813	5	61	193	10.00				4.0	1.00
399814	22	105	448	10.00				3.0	2.00
399815	29	51	312	20.30				11.0	6.00
399816	9	100	93	10.00				2.0	0.50
399817	9	29	219	10.00				2.0	0.50

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Sample No.	B*	Ti*
ST0222.01	-3
ST0222.02	-3
ST0222.03	-3
ST0222.04	-3
ST0222.05	-3
399812		30
399813		120
399814		180
399815		240
399816		30
399817		120

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Faktaarket ble generert 13.06.2026

Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no

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