Norsk versjon
THE ORE DATABASE
Occurence 5043 - 069 Orvasselv
(Object Id: 363)
(Last updated: 03.12.1998)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Røyrvik (1924-4) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 420432 m. North: 7194923 m.
Longitude: 13.3207480 Latitude: 64.8691180
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
1991 - 1991 Sampling Company/Institution :NGU

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Irregular
Main texture: Fracture filling Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration: Silicification
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Køli Nappe Complex
Tectonic complex: Gjersvik Nappe
Igneous complex: Skorovass Complex
Group: Gjersvik Formation:

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

Lithology:
Relationship Rock Origin
Host rock Quartz keratophyre Extrusive
Original rock :Rhyolite
Metamorphic facies :Greenschist
Host rock Greenstone Extrusive
Original rock :Basalt
Metamorphic facies :Greenschist
Wall rock Dolerite Intrusive
Original rock :Dolerite
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :220 / 45 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Et felt med kraftig rustdannelse ved et lite vann sørvest for Orrvatnet, høydekote 650 m. Bekken fra vannet renner gjennom dette feltet. Det finnes ikke noe skjerp i dette området. Mineraliseringen er av samme type som f.eks på Litjfjellet, dvs. fin og grovkornet svovelkis-disseminasjon i grønnstein. Ingen bestemt horisont kan skilles ut siden rustdannelsen er uregelmessig og hyppig spredt innenfor et område på 30x120 m. Tilsvarende rustsoner finnes også 750 m lengre vestsørvest i strøkretning, opp langs en bekk som renner ut i nordvestenden av Bjørkvatnet. Der opptrer mineraliseringen også i kvartskeratofyr. Grønnsteinen er massiv og mere dolerittisk. Samme type mineralisering også ved pukkverket.

Fieldsamples
Sample No. Sample type Miscellanrous
LS91102 Bedrock
Sampler: Størseth, L.R.
Comment: Fine grained pyrite dissemination in greenstone.
No. of registrated element analyses = 1
LS91103 Bedrock
Sampler: Størseth, L.R.
Comment: Medium grained pyrite crystals in greenstone.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Pukkverk ved Bjørkvatnet
(Object Id: 6950 69,00,01)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Røyrvik (1924-4) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 420057 m. North: 7194498 m.
Longitude: 13.3130770 Latitude: 64.8652170
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis


Fieldsamples
Sample No. Sample type Miscellanrous
HK90-212 Bedrock
Sampler: Karlstrøm, H.
Comment: Pyrite dissemination in silicified, massive greenstone.
No. of registrated element analyses = 1
HK90-213 Bedrock
Sampler: Karlstrøm, H.
Comment: Pyrite dissemination in rusty, silicified greenstone.
No. of registrated element analyses = 1
HK90-214 Bedrock
Sampler: Karlstrøm, H.
Comment: Pyrite mineralization in quartz vein in greenstone.
No. of registrated element analyses = 1
HK90-215 Bedrock
Sampler: Karlstrøm, H.
Comment: Quartz vein with some pyrite in quartz keratophyre.
No. of registrated element analyses = 1
HK90-216S Bedrock
Sampler: Karlstrøm, H.
Comment: Chip sample.
No. of registrated element analyses = 1
HK90-238 Bedrock
Sampler: Karlstrøm, H.
Comment: 60-70 cm thick quartz vein with aggregates of pyrite and accessory magnetite and chalcopyrite.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5043 - 069 Orvasselv

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#
HK90-212 Bedrock 163 201 10 32 10 .3 5.0
HK90-213 Bedrock 37 103 2 25 27 .1 1.0
HK90-214 Bedrock 635 114 6 90 71 .8 9.0
HK90-215 Bedrock 18 49 2 3 3 .2 3.0
HK90-216S Bedrock 157 85 2 36 17 .3 3.0
HK90-238 Bedrock 2210 49 2 154 150 1.7 11.0
LS91102 Bedrock 24 180 2 21 32 .2 2.0
LS91103 Bedrock 207 188 2 32 18 .3 8.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
HK90-212 1.0 2.0 8 .4 110 1.00 2 2 1.24
HK90-213 1.0 2.0 4 .2 9 1.00 2 2 .10
HK90-214 1.0 3.0 49 .7 2 1.00 2 2 4.32
HK90-215 1.0 2.0 2 .2 4 1.00 2 2 .23
HK90-216S 1.0 2.0 2 .2 41 1.00 2 2 .81
HK90-238 1.0 2.0 60 .7 7 1.00 2 2 14.21
LS91102 1.0 1.0 15 .7 6 1.00 2 2 2.19
LS91103 1.0 1.0 36 .2 6 9.00 2 2 3.74
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
HK90-212 138 5 557 4.79 1.00 5.00 1 11.0 2.00
HK90-213 111 35 990 5.87 1.00 5.00 1 158.0 2.00
HK90-214 67 7 732 7.66 2.00 5.00 1 17.0 2.00
HK90-215 13 1 210 2.53 1.00 5.00 1 5.0 2.00
HK90-216S 110 13 637 4.94 1.00 5.00 1 45.0 2.00
HK90-238 50 1 429 22.13 2.00 5.00 1 2.0 2.00
LS91102 65 30 682 4.84 1.00 5.00 1 3.0 2.00
LS91103 102 94 956 10.24 1.00 5.00 1 5.0 2.00
------------------
Sample No. B*
HK90-212 4
HK90-213 4
HK90-214 3
HK90-215 7
HK90-216S 5
HK90-238 2
LS91102 2
LS91103 2

The fact sheet was created on 02.05.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2024 Geological Survey of Norway