Faktarka for Forekomstområde 1665

					English version
	MALMDATABASEN
	Forekomstområde 1665 - 009
	(Sist oppdatert 07.nov.2023)

Navn på deposit area : Våråviken

(Objekt Id : 1665,009,00,00)

Lokalisering

Fylke :

Sør-Trøndelag (16)

Kommune :

Tydal (1665)

Kart 1:50000:

Tydal (1721-3)

Kart 1:250000:

Trondheim

Markeringspunkt:

Lengdegrad:

11.6692860

Breddegrad:

63.0763450

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

634824 m.

Y-koord:

6996896 m.

Materialtype

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

Production

Activity:	Prøvedrift	Reserves:
Prod. method:	Dag- og underjordsdrift	Production:
Prod. status:	Nedlagt	Volume of dump:	200 m3

Betydning

Offentlig: Not Assessed (reg. 18.02.2015)

Economical: Ikke vurdert

Operations

From - To Activity Comments

1822 - 1824 Test mining Company/Institution :Røros Kobberverk

1997 - 1997 Sampling Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Ordovician

Dating: Method:

Genesis: Vulkeks Form: Linse

Main texture: Strukturløs Min. distribution: Massiv

Main grain size: Finkornet (<1 mm) Main alteration: Silifisering

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

Opplysning(er) i fritekstformat

Fri tekst

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.

Bilde(r) fra forekomstområdet:

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

Kommentar :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

Kommentar :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

Kommentar :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

Kommentar :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

Kommentar :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

Forekomstområde 1665 - 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

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

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

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:
	Igneous complex:

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%)

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

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

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