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THE ORE DATABASE
Occurence 5042 - 005 Musurtanghøgda
(Object Id: 216)
(Last updated: 10.12.1998)
Location
County: Trøndelag Municipality: Lierne (5042)
Map 1:50000: Murusjøen (1923-1) Map 1:250000: Grong
Coordinate system: EU89-UTM Zone 33
East: 448231 m. North: 7152648 m.
Longitude: 13.9224470 Latitude: 64.4953070
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Test mining Reserves:
Operating method: Underground mining Historical production:


Products
Element/product Crude ore grade or quality Reg. date
Cu 1.6 % 16.03.1993

Operations
From - To Activity Comments
1903 - 1904 Test mining
1971 - 1971 Geology Company/Institution :Grong Gruber A/S
1974 - 1974 Geophysics Company/Institution :Grong Gruber A/S
1976 - 1976 Core drilling Company/Institution :Grong Gruber A/S
1991 - 1991 Sampling Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Orthomagmatic formation Form: Lens
Main texture: Structureless 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: Seve Nappe Complex
Tectonic complex:
Igneous complex:
Group: Formation: Muru-Hestkjølen Gneiss

Mineralogy
Relationship Mineral Amount
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Garnet Subordinate mineral (1-10%)
Gangue mineral Quartz Accessory mineral (<1%)
Ore mineral Chalcopyrite Major mineral (>10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Hematite Major mineral (>10%)
Ore mineral Pyrrhotite Subordinate mineral (1-10%)
Ore mineral Covellite Accessory mineral (<1%)
Ore mineral Magnetite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock Amfibolite Intrusive
Original rock :Gabbro
Metamorphic facies :Amphibolite

Information(s) in free text format
Free text
Forekomsten ligger nær Grongfeltets sørøst-grense og riksgrensen i vesthellingen av en knaus i flatt terreng med tett, nyplantet (1991) skog som det er vanskelig å orientere seg i. Det er arbeidet på tre nærliggende steder. Gruva ble siste gang bearbeidet i 1903 eller 1904, men ble funnet før 1900. Mineraliseringen opptrer i grovkornet amfibolitt. Rett nord for forekomsten er det flere ultramafittkropper. Amfibolitten er tett, seig, middelskornet og gabbroid. Kobberkis synes å opptre sammen med granat. Feltet ligger på en antiform-struktur. Mediananalyse (Grong Gruber A/S): 0.6 % Cu, 15 ppm Zn, 10 ppm Pb, 0.8 ppm Ag, 130 ppm Ni. Lamplutten skjerp litt lengre øst har disseminasjon av magnetkis og kobberkis (Oftedahl 1958).

Bibliography:
From NGU's Reference Archive:
Oftedahl, Christoffer , 1958
Oversikt over Grongfeltets skjerp og malmforekomster.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.202;1-75 + fo pages
Abstract:
Ore occurences of the Grong area: In the period 1910-1918 a great number of ore occurences were discovered in the Grong area. The late state geologist Steinar Foslie mapped the area in the years 1922-1931. Foslie also mapped all claims and occurences and made special field investigations in a few cases. This book presents a survey of all occurences chiefly based on the field observations of Foslie. In addition the present author has done some field work in connection with the three large deposits, Joma, Skorovass, and Gjersvik. The map, Plate 1, shows the areal geology and the location of the occurrences, numbered from 1 to 131. the ore of the occurrences is chiefly pyrite. The larger occurrences also contain some chalcopyrite and sphalerite etc. and the smaller occurrences contain ither pure pyrite with some magnetite. The Joma deposit (No. 1), contains about 15.5 mill. tons of ore. The ore zone forms an arc and is situated within a thick series of greenstones (Fig. 1). The Skorovass mine (No. 2), contains about 7,5 mill. tons of ore. The deposit is situated in a greenstone complex (Fig. 7), and is immediately surrounded by asid tuffs of quartz keratophyric composition (Table 1).

Fieldsamples
Sample No. Sample type Miscellanrous
LS91155 Bedrock
Sampler: Størseth, L.R.
Comment: Relatively rich chalcopyrite ore.
No. of registrated element analyses = 1
LS91156 Bedrock
Sampler: Størseth, L.R.
Comment: Chalcopyrite dissemination in partly banded amphibolite.
No. of registrated element analyses = 1
LS91157 Bedrock
Sampler: Størseth, L.R.
Comment: Pyrite dissemination in chloritised rock.
No. of registrated element analyses = 1
1160 Bedrock
No. of registrated element analyses = 1
1161 Bedrock
No. of registrated element analyses = 1
1162 Bedrock
No. of registrated element analyses = 1
1163 Bedrock
No. of registrated element analyses = 1
1164 Bedrock
No. of registrated element analyses = 1
1165 Bedrock
No. of registrated element analyses = 1
1166 Bedrock
No. of registrated element analyses = 1
1167 Bedrock
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5042 - 005 Musurtanghøgda

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#
LS91155 Bedrock 17294 81 2 46 307 1.4 28.0
LS91156 Bedrock 17982 31 3 186 454 1.7 58.0
LS91157 Bedrock 11349 24 2 458 189 .7 29.0
1160 Bedrock 18612 11 126 19 124 .7 11.0
1161 Bedrock 7932 10 104 9 54 .6 12.0
1162 Bedrock 8512 6 28 5 30 .6 15.0
1163 Bedrock 7032 5 12 29 315 .4 19.0
1164 Bedrock 13393 9 9 19 136 .9 23.0
1165 Bedrock 2724 5 6 37 295 .3 4.0
1166 Bedrock 2561 12 3 67 517 .4 5.0
1167 Bedrock 10833 17 2 116 155 .6 31.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
LS91155 3.0 17.0 2 1.6 3 3.00 2 4 1.89
LS91156 21.0 22.0 2 1.3 4 2.00 2 2 3.72
LS91157 14.0 39.0 2 .2 5 4.00 2 7 4.59
1160 1.0 2.0 4 1.2 7 1.00 3 2 2.27
1161 2.0 2.0 5 .5 2 1.00 3 2 .84
1162 3.0 2.0 5 .5 1 1.00 2 2 .98
1163 96.0 92.0 2 .4 2 1.00 3 2 .93
1164 1.0 2.0 2 1.0 1 1.00 2 2 1.54
1165 3.0 2.0 3 .2 1 1.00 2 2 .73
1166 2.0 2.0 7 .3 1 1.00 3 2 1.36
1167 2.0 2.0 2 .7 3 1.00 2 2 2.13
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
LS91155 76 72 158 4.84 1.00 5.00 1 2.0 2.00
LS91156 70 57 167 7.21 1.00 5.00 1 30.0 5.00
LS91157 219 129 267 11.54 1.00 5.00 1 8.0 2.00
1160 13 22 38 2.18 1.00 5.00 1 1.0 2.00
1161 49 6 105 2.50 1.00 5.00 1 1.0 2.00
1162 33 10 55 1.73 1.00 5.00 1 1.0 2.00
1163 64 47 91 1.85 2.00 5.00 1 4.0 16.00
1164 25 4 48 1.93 1.00 5.00 1 1.0 2.00
1165 28 2 41 1.68 1.00 5.00 1 1.0 2.00
1166 115 103 87 5.49 1.00 5.00 1 1.0 2.00
1167 24 113 178 3.99 1.00 5.00 1 1.0 2.00
------------------
Sample No. B*
LS91155 2
LS91156 3
LS91157 4
1160 10
1161 9
1162 8
1163 8
1164 7
1165 8
1166 7
1167 7

The fact sheet was created on 29.04.2024
Questions or comments regarding the fact sheet can be emailed to:
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