Norsk versjon
THE ORE DATABASE
Occurence 5022 - 024 Innsetlia
(Object Id: 4291)
(Last updated: 01.07.1998)

Location
County: Trøndelag Municipality: Rennebu (5022)
Map 1:50000: Innset (1520-2) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 556088 m. North: 6953422 m.
Longitude: 10.0963910 Latitude: 62.7070080
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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: Test mining Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
1997 - 1997 Sampling Company/Institution :NGU-Malmreg.

Mineralization
Genesis: Volcex Form:
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: 355 / 60 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Period:
Province: Caledonides
Geotec.unit: Trondheim Nappe Complex
Tectonic complex: Støren Nappe
Igneous complex:
Group: Støren Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Chlorite Major mineral (>10%)
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Feldspar Subordinate mineral (1-10%)
Gangue mineral Amphibole Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Chalcopyrite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Wall rock Greenschist Sedimentary
Original rock :Tuffite
Metamorphic facies :Greenschist
Wall rock Chlorite schist Sedimentary
Original rock :Tuffite
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :355 / 60 Post-mineralisation ;...Effect :None
Wall rock Mineral lineation Dir./Plunge :15 / 30 Post-mineralisation ;...Effect :Modifies
Wall rock Fold axis Dir./Plunge :15 / 30 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Description
Mineraliseringen, som ligger i lia NØ for Nyberget gruve, og 50-100 m ovenfor traktorvei og kraftlinje, er undersøkt med 3 skjerp langs en strøklengde på 50 m: Det SSØ-ligste er en 2 x 3 m2 gjenrast synk (50 m3 tipp) som er drevet på to parallelle kislag. Det nederste er bare delvis blottet og er minst 10 cm mektig. Det er fin- til middelskornet, magnetkisdominert og består av semimassiv til massiv magnetkis og svovelkis (prøve 01). Vanligvis opptrer svovelkisen som større korn i finkornig magnetkisgrunnmasse, men det fins også finkornig massiv magnetkis uten svovelkis i cm-mektige bånd. Adskilt av 60 cm mektig lys feltspatisk grønnskifer ligger øvre kissone, 50 cm mektig svovelkis-dominert semimassiv svovelkis-magnetkis-mineralisering i klorittskifer med endel mm-cm-mektige bånd av kvarts. Klorittskifer fortsetter derover i minst 2 m mektighet. Foliasjon: 355/60. 10 m mot NNV er det en liten skjæring (30 m3 tipp) inn i skrent. Den er gjenrast og mineralisering er ikke blottet, men fra tippen sees massiv svovelkisdominert mineralisering med noe magnetkis (prøve 02). I en stuff sees et ca. 1 cm mektig karbonatbånd i kontakt med kisen. Skjæringen blottlegger litt av hengen, som er småfoldet (tildels kinkfolder, akseretning 15/30) klorittskifer. 40 m videre mot NNV er en skjæring i en liten skrent (10 m3 tipp). Over en mektighet på 3.5 m er det i klorittskiferen 3 dm-mektige lag av finkornig massivsulfid. Det øverste er totalt magnetkisdominert, mens de to andre er svovelkisdominert. I hengen til det nederste er det en 0.5-1 m mektig, tilnærmet konkordant trondhjemittgang. 25 m videre mot NNV er det en liten grop som blottlegger rusten klorittskifer. Ca. 300 m videre NNV, i en liten rygg vest for den lille bekken som renner like vest for de forrannevnte skjerp, og sannsynligvis på et noe lavere stratigrafisk nivå, er det gravd en liten grop. Her sees rusten klorittskifer med et par tynne (10-20 cm) lag hvit kvartsitt med små magnetittkrystaller og på ett sted magnetkis-svovelkis-impregnasjon.

Bibliography:
From NGU's Reference Archive:
Nilsen, Odd , 1978
Caledonian sulphide deposits and minor iron-formations from the southern Trondheim region, Norway.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.340;35-85 + k pages
Abstract:
Within the southern and central parts of the Trondheim region of the Norwegian Caledonides a great number of small, stratabound cupriferous pyrite deposits are confined to mafic metavolcanics of the Gula, Støren and Fundsjø Groups of the Lower Palaeozoic succession. The deposits occuring within, or in close contact with the metavolcanics are characterized by their association with minor manganiferous oxide/silicate iron-formations - better known as "vasskis" ore type - within the metamorphic low-grade areas. The iron-fprmations of the metamorphic higher grade terrains on the other hand, which are extensively developed within the Gula Group, are mostly of a pyrrhotitic sulphide/silicate type and sulphurization processes are thought to have played an important role during the metamorphism. The pyrite deposits occurring adjacent to the metavolcanics bear no relationship to the iron-formations. They are embedded in pelitic, often carbonaceous assemblages (Gula Group) or within tuffitic members of the volcanogene Støren Group, and they are thought to represent re-sedimented (reworked) deposits. The pyrite deposits display varying degree of metamorphic reconstitution and a tectonic control has apparently determined their disc- or ruler-shaped morphology.

Fieldsamples
Sample No. Sample type Miscellanrous
ST0088.01 Bedrock
Sampler: Wilberg/...Stored: Løkken
Comment: Fink. massiv po-py-min.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point:
(Object Id: 10091 24,00,01)

Location
County: Trøndelag Municipality: Rennebu (5022)
Map 1:50000: Innset (1520-2) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 556248 m. North: 6953678 m.
Longitude: 10.0995890 Latitude: 62.7092790
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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
ST0088.02 Dump
Sampler: Wilberg, R./...Stored: Løkken
Comment: Masiv py-dom. min.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 5022 - 024 Innsetlia

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#
ST0088.01 Bedrock 287 260 18 94 88 1.0 29.0
ST0088.02 Dump 379 182 12 196 77 .6 12.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
ST0088.01 1.0 2.0 -2 1.0 7 8.00 -3 15 25.60
ST0088.02 3.0 6.0 48 1.0 12 5.00 -3 16 26.00
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
ST0088.01 106 29 854 27.96 9.00 -8.00 -2 10.0 11.00
ST0088.02 53 19 2676 37.26 7.00 -8.00 2 69.0 6.00
------------------
Sample No. B*
ST0088.01 -3
ST0088.02 -3


The fact sheet was created on 05.05.2024

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