English version
	MALMDATABASEN
	Forekomstområde 1644 - 029
	(Sist oppdatert 19.mar.2024)

Betydning

Offentlig:

Little Importance (reg. 27.05.2015)

Economical:

Ikke vurdert

Products

	Element/product	Crude ore grade or quality
	CU	2.35 %
	S	45.9 %
	ZN	0.17 %

Operations

	From - To	Activity	Comments
	1766 - 1769	Test mining	Company/Institution :Selbo kobberverk/Røros kobberverk
	1773 - 1798	Regular production	Company/Institution :Selbo kobberverk
	1857 - 1868	Regular production	Company/Institution :Tydals verk
	1895 - 1897	Regular production	Company/Institution :A Huitfeldt & Co
	1897 - 1899	Regular production	Company/Institution :The Cape Copper Company Ltd.
	1899 - 1903	Regular production	Company/Institution :A. Huitfeldt & Co
	1903 - 1907	Regular production	Company/Institution :Kjøli Mines Ltd.
	1910 - 1914	Regular production	Company/Institution :Verstrate & Fils
	1915 - 1919	Regular production	Company/Institution :A. Huitfeldt & Co
	1930 - 1941	Regular production	Company/Institution :Kommunal drift

Mineralization

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

Main grain size:

Middelskornet (1-3 mm)

Main alteration:

Klorittisering

	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	Quartz	Major mineral (>10%)
	Gangue mineral	Chlorite	Major mineral (>10%)
	Gangue mineral	Muscovite	Subordinate mineral (1-10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Pyrrhotite	Subordinate mineral (1-10%)
	Ore mineral	Sphalerite	Subordinate mineral (1-10%)
	Ore mineral	Magnetite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Grå metaarenite	Sedimentary Original rock :Greywacke
			Metamorphic facies :Greenschist
	Wall rock	Kloritt-muskovitt skifer	Sedimentary Original rock :Argillaceous sediment
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :165 / 20	Post-mineralisation ;...Effect :None

Opplysning(er) i fritekstformat

Fri tekst

Kjøli gruve ligger omtrent 1160 moh i sørskråningen av Kjølifjell. En vel 4 km lang bomvei går fra Reitanveien og nordover til gruva. Forekomsten skal være funnet i august 1766, og det oppsto med en gang strid mellom Røros og Selbo Kobberverk om rettighetene til funnet. Begge verk startet drift men fant imidlertid malmen uegnet ved smelting. Selbo Kobberverk startet imidlertid drift igjen i 1773 og produserte 13.570 tonn malm fram til 1798. Tydal verk drev gruven igjen i 1860-årene fram til 1868. Fra 1897 og fram til avslutning i 1941 ble den periodevis drevet som pyrittgruve av ulike engelske, belgiske og norske interessenter. Totalt skal det være produsert omkring 250.000 tonn (Rui & Bakke 1975). Forekomsten er drevet som to gruver, Kjøli I (Gammelgruven) og Kjøli II (Nygruven) som ligger med vinkel til hvearndre. Strøket i den nedre Gammelgruven er NØ-SV med fall mot NV og i Nygruven NNV-SSØ med fall mot VSV. Fall varierer fra 0° til opp mot 30°. I tillegg finnes en rekke forkastninger som deler opp malmkroppen i flere linser (Aasgaard 1927). I dag er området ryddet og det er lite malm å se med unntak av en mindre tipp nedenfor inngangen til Kjøli II. Malmsonene ligger i glimmerskifer og mer massiv metagråvakke. De er vanligvis mindre enn 1 m mektige, men kan være opptil 2-3 m. De består i hovedsak av massiv pyritt med mindre mengder kobberkis og magnetkis.Gangmineraler er kvarts og kloritt som utgjør omkring 5 volum%. Massiv magnetitt med underordnet sulfidmineraler opptrer stedvis, gjerne i heng av malmsonen. Sidebergarten er gjene klorittisert.

Bilde(r) fra forekomstområdet:

Photo no. 1 showing Informasjonsplakat ved Kjøli" Photo no. 2 showing Kjøli-feltet"

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.

Bakke, Inge , 1972

	Berggrunnsgeologisk undersøkelse i områdene omkring kisdraget Kjøli-Allergot, Ålem - Tydal, Sør-Trøndelag.

;UiO Geografisk inst.;AVHANDLING

Rui, Ingolf J.; Bakke, Inge , 1975

	Stratabound sulphide mineralization in the Kjøli area, Røros district, Norwegian Caledonides.

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.55 (1);51-75 pages

Abstract:

Two important sulphide ore-bearing formations have been recognized in the Cambro-Silurian succession of the Røros district. One is composed of submarine greenstones and quartz keratophyres (the Hersjø Formation). The other one, which is studied here, consists of a heterogeneous series of banded meta-argillites and meta-greywackes with subordinate thin green interlayers of probable volcanogenic origin (the Røsjø Formation). These two formations are embedded in a thick succession of various clastic sedimentary rocks which have undergone metamorphism and folding during the Silurian orogeny. The numerous sulphide deposits which occur in the Kjøli area are largely confined to the Røsjø Formation. The sulphide bodies are chiefly composed of massive pyrite and/or pyrrhotite showing variable chalcopyrite and sphalerite grades. The massive sulphides often occur as thin, extensive sheets, locally as irregular, small lenses which rarely exceed one metre in thickness. It is probable that the sulphides have been precipitated primarily on the sea-floor, but there is no clear evidence of a volcanogenic origin. Local discordant relationships between the massive sulphides and the wall rocks are ascribed to metamorphic mobilization of the sulphides. The thicker sulphide lenses may themselves represent mobilized portions of thinner sulphide-rich units.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	399651	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 : Kjøli II

(Objekt Id : 1644,029,01,00)

---

Lokalisering

Fylke :

Sør-Trøndelag (16)

Kommune :

Holtålen (1644)

Kart 1:50000:

Ålen (1720-4)

Kart 1:250000:

Røros

Markeringspunkt:

Lengdegrad:

11.6336920

Breddegrad:

62.8687540

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

633974 m.

Y-koord:

6973707 m.

Materialtype

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

Production

	Activity:	Gruvedrift	Reserves:
	Prod. method:	Underjordsdrift	Production:
	Prod. status:	Nedlagt	Volume of dump:

Ownership

	Type of ownership	Owner	Land- and title number
	Concessionary (Mining rights)	Mindex ASA

Bilde(r) fra forekomstområdet:

Photo no. 1 showing Kjøli II, tppene"

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0220.01	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :py-cpy malm, massiv, finkornet, noe kvarts i matriks. No. of registrated element analyses = 1
	ST0220.02	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :py malm, massiv, finkornet, middelskornete py- blaster, spor av cpy, grønne fragmenter. No. of registrated element analyses = 1
	ST0220.03	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Kommentar :py-cpy malm, massiv, fin-middelskornet. No. of registrated element analyses = 1

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

---

Analyse Results

from

Forekomstområde 1644 - 029 Kjøli

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#
ST0220.01	Dump	37627	224	35	208	18	5.9	158.0
ST0220.02	Dump	20177	266	28	159	16	4.2	296.0
ST0220.03	Dump	28251	196	31	149	12	4.4	214.0
399651	Dump	28000	3722	44	86	29	5.5	356.0

------------------

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0220.01	-1.0	-1.0	150	-.2	3	-1.00	-3	45	42.20
ST0220.02	-1.0	-1.0	88	.3	3	-1.00	-3	40	43.39
ST0220.03	3.0	1.0	86	-.2	2	-1.00	-3	37	44.63
399651			3	9.6	24	5.00	3	8

------------------

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0220.01	5	3	17	33.50	4.00	-8.00	-2	-1.0	-1.00
ST0220.02	8	6	31	32.14	3.00	-8.00	-2	1.0	-1.00
ST0220.03	5	2	7	30.76	3.00	-8.00	-2	1.0	1.00
399651	47	87	564	23.90				4.0	8.00

------------------

Sample No.	B*	Ti*
ST0220.01	-3
ST0220.02	-3
ST0220.03	-3
399651		899

---

Faktaarket ble generert 13.06.2026

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

Copyright © 2026 Norges geologiske undersøkelse