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THE ORE DATABASE
Occurence 5042 - 011 Okstjern
(Object Id: 294)
(Last updated: 10.12.1998)
Location
County: Trøndelag Municipality: Lierne (5042)
Map 1:50000: Nordli (1923-4) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 433531 m. North: 7141779 m.
Longitude: 13.6214800 Latitude: 64.3952410
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

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


Products
Element/product Crude ore grade or quality Reg. date
Cu 0.9 % 17.03.1993

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

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

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Chlorite Major mineral (>10%)
Gangue mineral Sericite Subordinate mineral (1-10%)
Gangue mineral Garnet Subordinate mineral (1-10%)
Gangue mineral Plagioclase Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Magnetite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)
Ore mineral Ilmenite Accessory mineral (<1%)
Ore mineral Sphalerite Accessory mineral (<1%)
Ore mineral Molybdenite Accessory mineral (<1%)
Ore mineral Hematite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock Amphibolite Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite
Wall rock Garnet mica schist Sedimentary
Original rock :Argillaceous sediment
Metamorphic facies :Amphibolite

Information(s) in free text format
Free text
I en bjørkelund rett vest for Okstjern finnes en oppstikkende rusten knaus (5 x 5 m) med noe utsprengt materiale. Området omkring er fullstendig overdekket av løsmasser. Opplysninger om skjerpeaktiviteten finnes ikke. Mineraliseringen er knyttet til en amfibolitt, men blokker med granatglimmerskifer finnes også i skjerpet. Ulike typer mineraliseringer; svovelkis-båndet magnetittmalm med mye granat til semi-massiv magnetkis-svovelkis malm.

Fieldsamples
Sample No. Sample type Miscellanrous
LS91158 Bedrock
Sampler: Størseth, L.R.
Comment: Massive magnetite ore.
No. of registrated element analyses = 1
LS91159 Bedrock
Sampler: Størseth, L.R.
Comment: Magnetite ore with pyrite bands.
No. of registrated element analyses = 1
LS91160 Bedrock
Sampler: Størseth, L.R.
Comment: Massive pyrite.
No. of registrated element analyses = 1
LS91161 Bedrock
Sampler: Størseth, L.R.
Comment: Pyrite dissemination in chloritised rock.
No. of registrated element analyses = 1
LS91162 Bedrock
Sampler: Størseth, L.R.
Comment: Semi-massive pyrrhotite-pyrite ore in coarse grained amphibolite.
No. of registrated element analyses = 1
LS91163 Bedrock
Sampler: Størseth, L.R.
Comment: Gossan.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5042 - 011 Okstjern

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#
LS91158 Bedrock 2840 22 2 10 17 .1 2.0
LS91159 Bedrock 390 19 5 39 9 .1 4.0
LS91160 Bedrock 27619 164 6 122 12 9.0 113.0
LS91161 Bedrock 1767 332 2 39 20 .5 11.0
LS91162 Bedrock 4829 84 8 71 31 1.4 17.0
LS91163 Bedrock 1554 55 12 15 4 .7 5.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
LS91158 1.0 3.0 2 .2 2 15.00 2 2 1.12
LS91159 1.0 3.0 5 .2 3 13.00 2 2 9.28
LS91160 1.0 2.0 19 2.1 1 3.00 2 2 41.10
LS91161 1.0 2.0 3 .2 2 3.00 5 2 8.48
LS91162 1.0 1.0 3 .7 3 6.00 5 8 18.05
LS91163 1.0 1.0 15 .2 22 18.00 5 2 3.62
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
LS91158 215 7 187 42.75 1.00 5.00 1 1.0 2.00
LS91159 137 26 171 35.00 1.00 5.00 1 1.0 2.00
LS91160 4 16 123 21.97 1.00 5.00 1 1.0 2.00
LS91161 217 47 818 13.34 1.00 5.00 1 2.0 2.00
LS91162 166 18 428 32.72 1.00 5.00 1 1.0 2.00
LS91163 163 23 302 32.27 1.00 5.00 1 1.0 2.00
------------------
Sample No. B*
LS91158 6
LS91159 3
LS91160 4
LS91161 5
LS91162 5
LS91163 8

The fact sheet was created on 07.05.2024
Questions or comments regarding the fact sheet can be emailed to:
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