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THE ORE DATABASE
Occurence 5043 - 005 Langtarmen
(Object Id: 233)
(Last updated: 04.05.2006)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 412111 m. North: 7162989 m.
Longitude: 13.1647750 Latitude: 64.5806290
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Kis
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

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


Operations
From - To Activity Comments
1971 - 1971 Geology Company/Institution :Elkem AS (C. Halls)
1981 - 1984 Sampling Company/Institution :Grong Gruber A/S
1996 - 1996 Sampling Company/Institution :NGU

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Irregular
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: 240 / 60 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 Chlorite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Host rock Greenstone Extrusive
Original rock :Basalt
Metamorphic facies :Greenschist
Host rock Felsic agglomerate Extrusive
Original rock :Agglomerate
Metamorphic facies :Greenschist
Host rock Trondhjemite Intrusive
Original rock :Trondhjemite
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Schistosity Strike/Dip :240 / 60 Post-mineralisation ;...Effect :Modifies
Wall rock Foliation Strike/Dip :240 / 40 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Mineraliseringene ligger ca. 7 km SØ for Skorovas og ca. 3 km NØ for Øvre Nesåvatn i et område med en rekke tjern. Et av disse er smalt og langstrakt og er kalt Langtarmen. Et område med flere, tilnærmet parallelle rustsoner ligger ca. 200 m NV for dette vatnet. Rustsonene/mineraliseringene har en strøklengde på minst 1 km. Innen denne finnes horisonter med disseminerte sulfider, hovedsakelig pyritt. Stedvis finnes opptil 2 m mektige horisonter med "tråder"/årenettverk av sulfider. Rustsonene følger dels markerte kløfter i terrenget og er tilnærmet parallelle med grensen til Liminggruppens sedimenter i sørøst. Mineraliseringen ligger tildels i mørk grønnstein, finkornete tuffer og sure ekstrusiver. Bergartene er gjerne kraftig forskifret. En tett og svært finkornet disseminasjon av sulfider finnes i en mer silifisert, muligens agglomeratisk bergart. Dette er vanligvis pyritt, men også magnetkis kan være tilstede. Trondhjemittganger, som det er flere av, fører også pyritt, men i hovedsak kutter disse rustsonene. Analyser av prøver innsamlet av Grong Gruber fra den nordre delen av området gir opptil 0,14 % Cu og 0,01 % Zn.

Fieldsamples
Sample No. Sample type Miscellanrous
NT0249.03 Bedrock
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: Pyrite dissemination/veinlets, fine to medium grained in dark bluish green, silicified greenstone.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Langtarmen
(Object Id: 2118 5,00,01)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 412011 m. North: 7163049 m.
Longitude: 13.1626520 Latitude: 64.5811410
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Kis


Fieldsamples
Sample No. Sample type Miscellanrous
NT0249.01 Bedrock
Sampler: Sandstad, J.S./...Size(kg): 2
Comment: Pyrite-pyrrhotite dissemination/veinlets, partly pyrite-chlorite veinlets, fine grained in dark green agglomerate/breccia, choritised/silicified.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Langtarmen
(Object Id: 2119 5,00,02)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 412051 m. North: 7162989 m.
Longitude: 13.1635230 Latitude: 64.5806130
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Kis


Fieldsamples
Sample No. Sample type Miscellanrous
NT0249.02 Bedrock
Sampler: Sandstad, J.S./...Size(kg): 2
Comment: Pyrite dissemination/veinlets, fine to medium grained, in fine grained green agglomerate/breccia?, grey felsic fragments.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Langtarmen
(Object Id: 2120 5,00,03)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 412117 m. North: 7162994 m.
Longitude: 13.1648770 Latitude: 64.5806750
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Kis


Fieldsamples
Sample No. Sample type Miscellanrous
NT0249.04 Bedrock
Sampler: Sandstad, J.S./...Size(kg): 2
Comment: Pyrite dissemination, strong, quartz-pyrite veins (1-2cm) in dark greenstone.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Langtarmen
(Object Id: 2121 5,00,04)
Location
County: Trøndelag Municipality: Raarvihke (5043)
Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 412181 m. North: 7163199 m.
Longitude: 13.1661090 Latitude: 64.5825300
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Kis


Fieldsamples
Sample No. Sample type Miscellanrous
NT0249.05 Bedrock
Sampler: Sandstad, J.S./...Size(kg): 2
Comment: Pyrite dissemination/veinlets, very fine grained in few cm aggregates in fine to very fine grained, green-bluish green felsic rock/altered greenstone.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5043 - 005 Langtarmen

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#
NT0249.01 Bedrock 129 1296 19 28 8 .3 9.0
NT0249.02 Bedrock 117 173 12 25 14 -.3 3.0
NT0249.03 Bedrock 118 144 9 15 8 -.3 32.0
NT0249.04 Bedrock 1704 36 11 57 16 .8 18.0
NT0249.05 Bedrock 142 178 14 29 6 -.3 6.0
------------------
Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*
NT0249.01 1.0 1.0 -1.0 2 3.6 11 1.00 -2 -2
NT0249.02 1.0 -1.0 -1.0 4 -.2 6 1.00 -2 -2
NT0249.03 1.0 1.0 2.0 -2 .6 2 2.00 2 3
NT0249.04 2.0 4.0 2.0 26 -.2 5 7.00 -2 -2
NT0249.05 -1.0 2.0 2.0 -2 .4 2 -1.00 -2 -2
------------------
Sample No. S% V* Cr* Mn* Fe% Th* U* W* Sr*
NT0249.01 3.22 184 16 866 14.52 -2.00 -5.00 -2 9.0
NT0249.02 2.34 321 42 1339 17.16 -2.00 -5.00 -2 5.0
NT0249.03 3.60 247 13 550 14.75 -2.00 -5.00 -2 5.0
NT0249.04 11.17 220 43 541 27.62 -2.00 -5.00 -2 6.0
NT0249.05 2.07 89 9 1089 7.77 -2.00 -5.00 -2 25.0
------------------
Sample No. La* B*
NT0249.01 -1.00 -3
NT0249.02 -1.00 -3
NT0249.03 -1.00 -3
NT0249.04 -1.00 -3
NT0249.05 1.00 -3

The fact sheet was created on 04.05.2024
Questions or comments regarding the fact sheet can be emailed to:
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