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THE ORE DATABASE
Occurence 5518 - 001 Lotternes
(Object Id: 1363)
(Last updated: 26.04.2020)
Location
County: Troms Municipality: Loabák (5518)
Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 606702 m. North: 7628415 m.
Longitude: 17.6383090 Latitude: 68.7467590
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Pitting Reserves: 7900 thousand tons
Operating method: Historical production:


Products
Element/product Crude ore grade or quality Reg. date
Fe-mag. 15 % 26.04.1995
Fe-total 21.1 % 26.04.1995
P 0.73 % 26.04.1995
S 0.307 % 26.04.1995

Operations
From - To Activity Comments
1910 - 1916 Pitting
1916 - 1916 Core drilling
1978 - 1978 Geology Company/Institution :Rana Gruber A/S

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Sedex Form: Layer
Main texture: Banded Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration:
Strike/Dip: 180 / 15 Direction: 270
Plunge: 15
Stratigraphic classification of host rock
Era: Proterozoic Period: Neoproterozoic
Province: Caledonides
Geotec.unit: Seve-Køli Nappe Complex
Tectonic complex:
Igneous complex:
Group: Bogengruppen Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Hornblende Major mineral (>10%)
Gangue mineral Carbonate Subordinate mineral (1-10%)
Gangue mineral Chlorite Subordinate mineral (1-10%)
Gangue mineral Albite Subordinate mineral (1-10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Gangue mineral Epidote Accessory mineral (<1%)
Ore mineral Magnetite Major mineral (>10%)
Ore mineral Apatite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Host rock Karbonat gl.sk. Sedimentary
Original rock :Argillaceous sediment
Metamorphic facies :Amphibolite
Wall rock Kalkspatmarmor Sedimentary
Original rock :Limestone
Metamorphic facies :Amphibolite
Wall rock Dolomittmarmor Sedimentary
Original rock :Dolomite
Metamorphic facies :Amphibolite
Wall rock Granat Kv.gl.sk. Sedimentary
Original rock :Greywacke
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Primary layering Strike/Dip :180 / 15 Syn-mineralisation ;...Effect :None
Host rock Foliation Strike/Dip :180 / 15
Host rock Fold axis Strike/Dip :270 / 15

Information(s) in free text format
Free text
Lotternes er oppboret med 9 hull i 1916. 23 malmsoner i disse hullene utgjorde tilsammen 107,1 m lengde, og utregnet gjennomsnitt av analyser fra disse gir følgende: 21,1 % Fe-tot., 0,728 % P og 0,307 % S. Reservene, uten hensyn til brytbarhet, kan være ca. 7,9 mill. t. I følge boringen er mineraliseringen i Lotternes fattigere enn i Gunnarheimen. 9 utsøkt rike malmstuffer fra Lotternes-horisonten er analysert ved Norsk Jernverks lab. 1978, og ga følgende gjennomsnittsverdier: 27,18 % Fe-tot., 23,8 % Fe-magn., 0,34 % TiO2, 0,056 % MnO, 0,94 % P og 0,056 % S. 8 prøver av fattig impregnasjonsmalm gav i gjennomsnitt: 14,2 % Fe-tot., 7,2 % Fe-magn., 0,71 % TiO2, 0,074 % MnO, 0,44 % P og 0,529 % S. Det er relativt høye verdier av svovel og titan i denne impregnasjonsmalmen.

Bibliography:
From NGU's Reference Archive:
Johansson, J. A. , 1913
Lotternes jernmalmfelt.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 648;1 pages
Abstract:
Forst. Forekomstens navn og koordinater: Lavangen. Bergarten i området er kvartsglimmerskifer med kalksteinssoner. Malmen består av magnetitt med noe kvarts, glimmer, hornblende og granat. Magnetittgehalter er 35-40 %.

Fieldsamples
Sample No. Sample type Miscellanrous
JSFE1314 Bedrock
Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Banded magnetite-quartz-amphibole-garnet mineralisation
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Rundkollen I
(Object Id: 1719 1,01,00)
Location
County: Troms Municipality: Loabák (5518)
Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 606732 m. North: 7628446 m.
Longitude: 17.6391020 Latitude: 68.7470260
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Fieldsamples
Sample No. Sample type Miscellanrous
TR0414.02 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Fink., båndet mt.-min.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Rundkollen II
(Object Id: 1722 1,02,00)
Location
County: Troms Municipality: Loabák (5518)
Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 606532 m. North: 7628196 m.
Longitude: 17.6338980 Latitude: 68.7448630
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Fieldsamples
Sample No. Sample type Miscellanrous
TR0414.01 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Fink., båndet mt.-min.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Rundkollen III
(Object Id: 1721 1,03,00)
Location
County: Troms Municipality: Loabák (5518)
Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 606457 m. North: 7628196 m.
Longitude: 17.6320460 Latitude: 68.7448920
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Name of Locality: Rundkollen IV
(Object Id: 1720 1,04,00)
Location
County: Troms Municipality: Loabák (5518)
Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 606782 m. North: 7627796 m.
Longitude: 17.6396470 Latitude: 68.7411830
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Name of Locality: Sandbotnaksla
(Object Id: 1723 1,05,00)
Location
County: Troms Municipality: Loabák (5518)
Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 608082 m. North: 7624496 m.
Longitude: 17.6682010 Latitude: 68.7111160
Show on map
Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


Analyse Results
from
Deposit Area 5518 - 001 Lotternes

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#
JSFE1314 Bedrock 19 23 3 7 10 .3
TR0414.01 Bedrock 1221 979 233 -1 6 1.3 5.0
TR0414.02 Bedrock 352 281 91 -1 5 .5 -2.0
------------------
Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*
JSFE1314 0 211 1.70
TR0414.01 -3.0 -3.0 -5.0 5 1.3 51 3.00 10 -2
TR0414.02 -3.0 -3.0 -5.0 3 1.4 6 1.00 -2 -2
------------------
Sample No. Ga* S% V* Cr* Mn* Fe% Th* U* W*
JSFE1314 8.00 88 109 4.50 0.70
TR0414.01 .28 42 12 417 21.32 2.00 6.00 -2
TR0414.02 .26 36 12 230 27.58 3.00 5.00 -2
------------------
Sample No. Rb* Sr* Y* Zr* Nb* Ta* Cs* La* Ce*
JSFE1314 25.7 117.9 30.1 92 7.30 0.60 0.80 12.60 28.10
TR0414.01 217.0 8.00
TR0414.02 204.0 4.00
------------------
Sample No. Pr* Nd* Sm* Eu* Gd* Tb* Dy* Ho* Er*
JSFE1314 3.70 15.70 3.40 0.82 3.99 0.72 4.89 1.01 2.96
TR0414.01
TR0414.02
------------------
Sample No. Tm* Yb* Lu* B* Hf*
JSFE1314 0.41 2.82 0.49 2.80
TR0414.01 4
TR0414.02 -3

Oxide analyses
( All values are in % )
Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO
JSFE1314 Bedrock 50.33 6.00 0.50 32.47 0.11 3.63 4.61
------------------
Sample No. Na2O K2O P2O5 Loss Sum
JSFE1314 0.59 0.89 1.13 -0.07 100.00

The fact sheet was created on 03.05.2024
Questions or comments regarding the fact sheet can be emailed to:
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