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THE ORE DATABASE
Occurence 5033 - 009 Våråviken
(Object Id: 4429)
(Last updated: 07.11.2023)
Location
County: Trøndelag Municipality: Tydal (5033)
Map 1:50000: Tydal (1721-3) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 634824 m. North: 6996896 m.
Longitude: 11.6692860 Latitude: 63.0763450
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Zinc
Element(s): Zn Cu Pb Kis Co
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Test mining Reserves:
Operating method: Open pit and underground mining Historical production:


Operations
From - To Activity Comments
1822 - 1824 Test mining Company/Institution :Røros Kobberverk
1997 - 1997 Sampling Company/Institution :NGU

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Lens
Main texture: Structureless Min. distribution: Massive (>50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Silicification
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Trondheim Nappe Complex
Tectonic complex:
Igneous complex:
Group: Kjølhaug Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Feldspar Major mineral (>10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Chalcopyrite Major mineral (>10%)
Ore mineral Sphalerite Major mineral (>10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Galena Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Wall rock Kvarts-biotitt bergart Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :32 / 10 Post-mineralisation ;...Effect :Modifies
Wall rock Mineral lineation Dir./Plunge :235 / 10 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Våråviken ligger ca. 400 m sørvest for Livollen i ei li sørvest for Gammelvollsjøen. Den ligger i et 5-10 år gammelt hogstfelt med relativt tett løvskog, men tippen og avrenning fra denne er relativt godt synlig. Røros kobberverk drev forsøksdrift på forekomsten i perioden 1822-24 for å skaffe svovelkis til smeltingen av Grønskardmalmen. Malmen er relativt rik, men har trolig liten utstrekning. En 3x10 m dagskjæring med retning 340° er utdrevet og i tillegg finnes en trolig grunn, vannfylt sjakt. Nedenfor gruva ligger en tipp på ca. 200 m3. Malmen er ikke blottet i gruva, men på tippen finnes ulike typer av rik malm; massiv magnetkis malm med varierende mengde sinkblende, blyglans og kobberkis dominerer (prøve 03). Sinkblende- (prøve 01) eller kobberkis-rik (prøve 04) magnetkis malm er også vanlig. Innholdet av bly og sølv er også relativt høyt. Båndet svovelkis-sinkblende malm (prøve 02) og breksje-type magnetkis malm med bergartsfragmenter (prøve 05) er underordnete malmtyper på tippen. Området omkring forekomsten er svært overdekket, men nord for denne finnes middelskornet gabbro. Bergarten i dagskjæringen er i hovedsak finkornet og kvartsrik med varierende innhold av biotitt og amfibol. Den kan ligne vertsbergarten til Grønskard- og Allergot-forekomstene og er trolig av sedimentær opprinnelse. Den tektonostratigarfiske plasseringen av forekomsten er usikker.

Photo(s) from the Deposit area:
Photo no. 1 showing Vårråviken 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
ST0227.01 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: sl-gn-cpy-po malm, fin-middelskornet, massiv, sink-rik
No. of registrated element analyses = 1
ST0227.02 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: sl-gn-cpy-py malm, massiv, fink, sl-bånd
No. of registrated element analyses = 1
ST0227.03 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: sl-cpy-gn-po malm, massiv, finkornet, få kv-øyne.
No. of registrated element analyses = 1
ST0227.04 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy-po-sl, cpy agg. i sulfid og biotitt-feltspat/kvarts rik, grønn sidebergart.
No. of registrated element analyses = 1
ST0227.05 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: sl-po, massiv malm, svært finkornet, få kvartsøyne.
No. of registrated element analyses = 1
399890 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399891 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399892 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399893 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399894 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399895 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5033 - 009 Våråviken

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#
ST0227.01 Dump 10435 99999 33499 169 64 126.0 67.0
ST0227.02 Dump 14091 92119 20881 357 8 47.0 1192.0
ST0227.03 Dump 15387 90231 14922 127 98 49.0 73.0
ST0227.04 Dump 34361 55193 9717 59 40 39.0 1834.0
ST0227.05 Dump 5152 92450 19620 450 84 49.8 613.0
399890 Dump 30600 94200 20400 846 31 53.9 363.0
399891 Dump 11200 75800 5691 114 69 26.9 199.0
399892 Dump 13600 152700 39500 417 18 82.5 322.0
399893 Dump 16600 87200 25300 698 15 56.0 831.0
399894 Dump 5062 69700 19900 485 45 44.2 448.0
399895 Dump 5075 5445 1195 65 53 3.9 210.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
ST0227.01 2.0 1.0 69 707.1 11 11.00 118 577 31.73
ST0227.02 1.0 2.0 453 248.4 3 14.00 99 192 45.79
ST0227.03 3.0 2.0 35 200.6 3 20.00 59 187 34.98
ST0227.04 1.0 2.0 104 130.5 95 16.00 56 85 10.97
ST0227.05 2.0 2.0 519 244.7 2 19.00 126 210 36.85
399890 565 144.8 5 15.00 71 164
399891 82 96.9 3 1.00 28 82
399892 660 257.1 3 13.00 127 262
399893 776 144.3 3 10.00 208 207
399894 410 115.2 7 15.00 86 147
399895 109 12.1 109 1.00 11 8
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
ST0227.01 10 5 1980 23.50 2.00 -8.00 -2 1.0 4.00
ST0227.02 4 -1 619 17.63 -2.00 -8.00 -2 11.0 1.00
ST0227.03 -1 -1 779 41.58 3.00 -8.00 -2 -1.0 -1.00
ST0227.04 100 99 901 14.71 10.00 -8.00 -2 5.0 29.00
ST0227.05 10 5 688 40.72 3.00 -8.00 -2 1.0 2.00
399890 10 74 496 38.19 3.0 0.50
399891 2 2 585 49.42 0.5 0.50
399892 3 106 527 32.26 4.0 0.50
399893 7 42 378 34.88 3.0 0.50
399894 14 39 492 42.88 3.0 1.00
399895 113 169 831 7.16 6.0 33.00
------------------
Sample No. B* Ti*
ST0227.01 -3
ST0227.02 3
ST0227.03 3
ST0227.04 -3
ST0227.05 -3
399890 30
399891 30
399892 30
399893 30
399894 30
399895 719

The fact sheet was created on 07.05.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2024 Geological Survey of Norway