Norsk versjon
THE ORE DATABASE
Occurence 5061 - 004 Lomunda
(Object Id: 4620)
(Last updated: 13.04.2020)
Location
County: Trøndelag Municipality: Rindal (5061)
Map 1:50000: Løkken (1521-3) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 516835 m. North: 6999839 m.
Longitude: 9.3338250 Latitude: 63.1275070
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: Pitting Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
1982 - 1982 Geology Company/Institution :Orkla Gruber
1982 - 1982 Geophysics Company/Institution :Orkla Gruber

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Layer
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration: Chloritisation
Strike/Dip: 75 / 45 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Trondheim Nappe Complex
Tectonic complex: Støren Nappe
Igneous complex:
Group: Støren Group Formation:

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

Lithology:
Relationship Rock Origin
Wall rock Greenschist Extrusive
Original rock :Basalt
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :75 / 35 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Forekomsten ligger rett på østsida av elva Lomunda. I bunnen av en brattskrent er det sprengt ut en kort stoll, kun 2,5 m lang med retning 70°, to meter over elvenivå. En sone med massive sulfider ligger i sterkt deformert grønnskifer som antas lå tilhøre den øvre sekvensen av grønnstein i Løkken-området. Den massive sulfidsonen er minst 1,2 m mektig og består av fin- til middelskornet pyritt med kun spor av kobberkis og med kvartsrik matriks. Den er best blottet i elvebredden. Tidligere undersøkelser, inkludert geofysiske målinger (Turam og VLF) og geologisk kartlegging har vist at sulfidsonen kan følges videre vestsørvestover over en lengde på 5-6 km (Bollingmo 1983).

Bibliography:
References not to be found in NGU's Reference Archive.:
Bollingmo, Å. 1983. The Lomunda Area. BV 1812, 7s. + vedlegg.

Fieldsamples
Sample No. Sample type Miscellanrous
JS-M1951 Dump
Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Massive pyrite, medium grained ('vasskis')
No. of registrated element analyses = 1
JS-M1952 Bedrock
Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Massive pyrite, fine-medium grained, quartz matrix ('vasskis')
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Skjerp 1
(Object Id: 36875 4,01,00)
Location
County: Trøndelag Municipality: Rindal (5061)
Map 1:50000: Løkken (1521-3) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 515370 m. North: 6998894 m.
Longitude: 9.3047020 Latitude: 63.1190950
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis


Name of Locality: Skjerp 2
(Object Id: 36876 4,02,00)
Location
County: Trøndelag Municipality: Rindal (5061)
Map 1:50000: Løkken (1521-3) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 515166 m. North: 6998787 m.
Longitude: 9.3006290 Latitude: 63.1181430
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis


Name of Locality: Skjerp 3
(Object Id: 36877 4,03,00)
Location
County: Trøndelag Municipality: Rindal (5061)
Map 1:50000: Løkken (1521-3) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 514809 m. North: 6998481 m.
Longitude: 9.2935440 Latitude: 63.1154030
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis


Analyse Results
from
Deposit Area 5061 - 004 Lomunda

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#
JS-M1951 Dump 200 327 10 18 57 .3 3.0
JS-M1952 Bedrock 126 353 5 21 39 .2 6.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
JS-M1951 -5.0 -1.0 179 1.1 40 7.84 0 1 0
JS-M1952 -5.0 -1.0 294 1.6 20 11.90 0 1 0
------------------
Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%
JS-M1951 3.00 2.21 0.46 0.05 10.00 56 19 890 36.90
JS-M1952 3.00 2.01 0.39 0.04 10.00 44 13 265 32.00
------------------
Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*
JS-M1951 0.98 1.80 -0 2.8 45.0 7.3 12 0.60 0.05
JS-M1952 0.82 0.60 -0 3.4 12.2 4.2 11 0.30 -0.05
------------------
Sample No. Cs* La* Ce* Li* Be* Na* Mg* Al* P*
JS-M1951 0.18 7.10 12.30 1 0 0 0 1 1760
JS-M1952 0.12 2.10 4.48 3 0 0 0 1 130
------------------
Sample No. K * Ca* Sc* Ti* Te* Hf* Re* Tl*
JS-M1951 0 3 2.20 0 0.16 0.30 10 0
JS-M1952 0 1 3.00 0 0.05 0.30 8 0

The fact sheet was created on 15.12.2025
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2025 Geological Survey of Norway