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Occurence 5026 - 031 Rundhaugen
(Object Id: 4424)
(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: 635499 m. North: 6974449 m.
Longitude: 11.6642510 Latitude: 62.8748490
Show on map

Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Zn Kis Co
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

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


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
Genesis: Volcex Form: Lens
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: No country rock alteration
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 Sandstone Sedimentary
Original rock :Greywacke
Metamorphic facies :Greenschist
Wall rock Phyllite 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

Information(s) in free text format
Free text
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.

Photo(s) from the Deposit area:
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
Comment: 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
Comment: 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
Comment: 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
Comment: 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.:

Name of Locality: Rundhaugen
(Object Id: 10025 31,01,00)

Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 635389 m. North: 6974328 m.
Longitude: 11.6619790 Latitude: 62.8738010
Show on map

Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Fe Kis
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


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

Information(s) in free text format
Free text
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
Comment: 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.:


Analyse Results
from
Deposit Area 5026 - 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
------------------
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
------------------
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
------------------
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


The fact sheet was created on 29.03.2024

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