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THE ORE DATABASE
Occurence 5026 - 022 Kårslått grube
(Object Id: 4415)
(Last updated: 07.11.2023)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 619625 m. North: 6972872 m.
Longitude: 11.3513300 Latitude: 62.8662550
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Co
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Mining Reserves:
Operating method: Underground mining Historical production:


Operations
From - To Activity Comments
- 1887 Test mining Company/Institution :Røros Kobberverk
1887 - 1887 Test mining Company/Institution :Trondhjem-Os Graphit-metal A/B
1887 - 1916 Regular production Company/Institution :O.K. Jensaas
1917 - 1917 Regular production Company/Institution :Røros Kobberverk

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Lens
Main texture: Structureless Min. distribution: Semi-massive (20-50 % 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: Trondheim Nappe Complex
Tectonic complex: Meråker Nappe
Igneous complex:
Group: Fundsjø Formation: Hersjø

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

Lithology:
Relationship Rock Origin
Wall rock Mica schist/phyllite Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite
Wall rock Amphibolite Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :140 / 50 Post-mineralisation ;...Effect :Modifies
Wall rock Foliation Strike/Dip :148 / 40 Post-mineralisation ;...Effect :Modifies
Wall rock Schistosity Strike/Dip :175 / 45 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Kårslått består av tre områder med synker over en lengde på ca. 250 m i NV-SØ retning. Den første driften var antakelig av Røros Kobberverk inntil 1887. Selskapet Trondhjem-Os Graphit-Metal A/B drev forsøksdrift i 1887, deretter ble hele feltet overtatt og dels funnet av O.K. Jensaas. i løpet av hans driftstid inntil 1916 ble det tatt ut 6-7 tonn kobbermalm med ca. 7 % Cu. I 1917 drev Røros Kobberverk forsøksdrift og tok ut ytterligere 2-3 tonn malm.

Photo(s) from the Deposit area:
Photo no. 1 showing Kårslått gruve"

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
ST0213.03 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy+po malm, middelskornet, strenger/aggregater i kvarts+amfibol linser/+årer i grønnskifer.
No. of registrated element analyses = 1
ST0213.04 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: po-cpy min, finkornet, diss./strenger i og langs kvarts+biotitt åre.
No. of registrated element analyses = 1
399762 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399763 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Kårslått, Synk nr. 4
(Object Id: 10006 22,01,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 619633 m. North: 6972819 m.
Longitude: 11.3514340 Latitude: 62.8657710
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Resources and production
Activity: Test mining Reserves:
Operating method: Underground mining Historical production:


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

Lithology:
Relationship Rock Origin
Wall rock Mica schist/phyllite Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite
Wall rock Amphibolite Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Name of Locality: Kårslått, Synk nr.3
(Object Id: 10007 22,02,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 619384 m. North: 6972924 m.
Longitude: 11.3466250 Latitude: 62.8667940
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Resources and production
Activity: Test mining Reserves:
Operating method: Open pit and underground mining Historical production:


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

Lithology:
Relationship Rock Origin
Wall rock Mica schist/phyllite Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Schistosity Strike/Dip :150 / 55 Post-mineralisation ;...Effect :Modifies

Photo(s) from the Deposit area:
Photo no. 1 showing Kårslått II"

Fieldsamples
Sample No. Sample type Miscellanrous
ST0213.05 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: po-cpy malm, fin-middelskornet, semi-massiv i granatførende fyllitt.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Kårslått, Synk nr. 5
(Object Id: 10008 22,03,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 619809 m. North: 6972728 m.
Longitude: 11.3548400 Latitude: 62.8648990
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Resources and production
Activity: Test mining Reserves:
Operating method: Underground mining Historical production:


Mineralogy
Relationship Mineral Amount
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Garnet Subordinate mineral (1-10%)
Ore mineral Chalcopyrite Major mineral (>10%)
Ore mineral Pyrrhotite Major mineral (>10%)

Lithology:
Relationship Rock Origin
Wall rock Mica schist/phylllite Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Schistosity Strike/Dip :140 / 55 Post-mineralisation ;...Effect :Modifies
Wall rock Mineral lineation Dir./Plunge :230 / 50 Post-mineralisation ;...Effect :Modifies

Photo(s) from the Deposit area:
Photo no. 1 showing Kårslått III"

Fieldsamples
Sample No. Sample type Miscellanrous
ST0213.01 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: po+cpy min., semi-massiv, kvarts+amfibol+granat matriks.
No. of registrated element analyses = 1
ST0213.02 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy årer og strenger i fyllittisk skifer med amfibolnåler.
No. of registrated element analyses = 1
399760 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Svenuken I
(Object Id: 10037 22,04,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 618774 m. North: 6972917 m.
Longitude: 11.3346550 Latitude: 62.8669330
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Mineralogy
Relationship Mineral Amount
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Ankerite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Wall rock Garbenschist Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite
Wall rock Amphibolite Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :197 / 55 Post-mineralisation ;...Effect :None

Photo(s) from the Deposit area:
Photo no. 1 showing Svenuken I"

Fieldsamples
Sample No. Sample type Miscellanrous
JS97007 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: py diss. og aggregater i bånd med grovkornet amfibol+kvarts+ankeritt i garbenskifer med grovkornete amfibolnåler.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5026 - 022 Kårslått grube

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#
JS97007 Dump 7166 65 4 21 4 6.6 547.0
ST0213.01 Dump 15137 155 5 1289 48 7.5 199.0
ST0213.02 Dump 26181 326 3 542 20 6.5 636.0
ST0213.03 Dump 58741 289 -3 158 38 15.3 994.0
ST0213.04 Dump 6694 25 5 36 17 1.5 180.0
ST0213.05 Dump 13375 84 5 161 45 2.7 21.0
399760 Dump 39000 550 63 465 22 10.0 486.0
399762 Dump 37000 210 67 114 29 7.6 293.0
399763 Dump 204800 644 288 200 33 43.3 244.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
JS97007 1.0 1.0 6 1.0 6 3.00 4 4 .62
ST0213.01 -1.0 -1.0 6 1.8 9 32.00 -3 5 21.51
ST0213.02 3.0 -1.0 4 4.3 12 11.00 6 -3 9.19
ST0213.03 2.0 -1.0 -2 6.3 12 1.00 19 -3 10.58
ST0213.04 3.0 1.0 -2 .5 33 -1.00 3 -3 2.33
ST0213.05 3.0 -1.0 -2 -.2 36 -1.00 -3 4 14.97
399760 149 8.4 6 18.00 3 6
399762 131 1.8 23 5.00 3 3
399763 80 14.0 3 18.00 3 3
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
JS97007 41 6 467 8.06 7.00 -8.00 -2 10.0 22.00
ST0213.01 40 1 832 41.58 6.00 -8.00 27 12.0 6.00
ST0213.02 165 7 479 29.88 8.00 -8.00 16 6.0 12.00
ST0213.03 112 18 336 24.52 7.00 -8.00 -2 3.0 10.00
ST0213.04 29 17 96 4.88 -2.00 -8.00 -2 3.0 3.00
ST0213.05 92 39 211 24.47 4.00 -8.00 -2 7.0 6.00
399760 112 53 674 10.00 18.0 9.00
399762 152 142 526 19.10 8.0 19.00
399763 9 53 109 10.00 3.0 0.50
------------------
Sample No. B* Ti*
JS97007 -3
ST0213.01 4
ST0213.02 -3
ST0213.03 -3
ST0213.04 -3
ST0213.05 -3
399760 180
399762 360
399763 30

The fact sheet was created on 25.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2024 Geological Survey of Norway