Norsk versjon | |||||
THE ORE DATABASE | |||||
Deposit 5026 - 029 Kjøli | |||||
(Object Id: 4422) (Last updated: 19.03.2024) |
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Location |
County: | Trøndelag | Municipality: | Holtålen (5026) |
Map 1:50000: | Ålen (1720-4) | Map 1:250000: | Røros |
Coordinate system: | EU89-UTM Zone 32 |
East: | 633674 m. | North: | 6973437 m. |
Longitude: | 11.6275860 | Latitude: | 62.8664430 |
Show on map |
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Resource |
Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Copper | |
Element(s): | Cu Kis |
Importance |
Raw material meaning: | Little Importance (reg. 27.05.2015) |
Resources and production |
Activity: | Mining | Reserves: | ||
Operating method: | Underground mining | Historical production: | 250 thousand tons |
Products |
Element/product | Crude ore grade or quality | Reg. date | |
Cu | 2.35 % | 25.05.1998 | |
S | 45.9 % | 27.05.2015 | |
Zn | 0.17 % | 27.05.2015 |
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 | |
Genesis: | Volcex | Form: | Plate | |
Main texture: | Structureless | Min. distribution: | Massive (>50 % ore minerals) |
Main grain size: | Medium grained (1-3 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 | 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 | Greyish meta-arenite | Sedimentary Original rock :Greywacke |
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Metamorphic facies :Greenschist | |||
Wall rock | Chlorite-muscovite schist | Sedimentary Original rock :Argillaceous sediment |
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Metamorphic facies :Greenschist |
Structures |
Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
Wall rock | Foliation | Strike/Dip :165 / 20 | Post-mineralisation ;...Effect :None |
Information(s) in free text format |
Free text |
The Kjøli deposit produced c. 250 000 t of ore with 1.9-2.4 % Cu, 0.02-0.2 % Zn, 45.9-46.8 % S during discontinuous production from 1773 to 1941. Other similar but much smaller deposits in the Kjøli area, including Midtgruben, Godthåb, Røros Menna and Svensk Menna, produced altogether only 15-20 000 t of copper ore. The deposits are hosted by banded meta-argillites and more massive metagreywackes, which contain thin layers of volcaniclastic sediments. The sulphide bodies are chiefly composed of massive pyrite and/or pyrrhotite with variable contents of chalcopyrite and sphalerite. Disseminated or layers of massive magnetite are quite commonly associated with the sulphides. The massive sulphides often occur as thin, extensive sheets, locally as irregular, small lenses which rarely exceed one metre in thickness. The sulphide bodies are typically surrounded by haloes of chlorite-rich schists, attributed to wallrock alteration. |
Photo(s) from the Deposit area: |
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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 |
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NB! All analyse values are shown at the end of the printout.: |
Name of Locality: Kjøli II |
(Object Id: 10023 29,01,00) |
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Location |
County: | Trøndelag | Municipality: | Holtålen (5026) |
Map 1:50000: | Ålen (1720-4) | Map 1:250000: | Røros |
Coordinate system: | EU89-UTM Zone 32 |
East: | 633974 m. | North: | 6973707 m. |
Longitude: | 11.6336920 | Latitude: | 62.8687540 |
Show on map |
|
Resource |
Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Copper | |
Element(s): | Cu Kis |
Resources and production |
Activity: | Mining | Reserves: | ||
Operating method: | Underground mining | Historical production: |
Photo(s) from the Deposit area: |
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Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
ST0220.01 | Dump |
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ST0220.02 | Dump |
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ST0220.03 | Dump |
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NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Deposit Area 5026 - 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 |
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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 |
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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 |
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Sample No. | B* | Ti* | |||||||
ST0220.01 | -3 | ||||||||
ST0220.02 | -3 | ||||||||
ST0220.03 | -3 | ||||||||
399651 | 899 |
The fact sheet was created on 29.03.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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