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THE ORE DATABASE
Occurence 1853 - 024 Lakså
(Object Id: 2428)
(Last updated: 17.01.2000)

Location
County: Nordland Municipality: Evenes (1853)
Map 1:50000: Astafjorden (1332-2) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 579150 m. North: 7600269 m.
Longitude: 16.9357440 Latitude: 68.5037150
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu Zn Pb
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

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


Operations
From - To Activity Comments
1882 - 1883 Test mining Company/Institution :Liland Kobberverk
1898 - 1898 Test mining Company/Institution :Liland Kobberverk

Mineralization
Era: Paleozoic Period:
Genesis: Sedex Form: Lens
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration:
Strike/Dip: 55 / 50 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period:
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Bogengruppen Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Calcite Subordinate mineral (1-10%)
Gangue mineral Tremolite Subordinate mineral (1-10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Gangue mineral Hornblende Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Galena Subordinate mineral (1-10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)
Ore mineral Sphalerite Subordinate mineral (1-10%)
Ore mineral Pyrite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Wall rock Kalkspatmarmor Sedimentary
Original rock :Limestone
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :55 / 50 Post-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Det ble drevet prøvedrift på Lakså forekomsten av Liland Kobberverk i 1882-83 og i 1898. Det ble iflg. Gustavson (1974) røsket og drevet flere synker, den dypeste vistnok ned til 70m i fallretningen. En transportstoll ble påbegynt i 1898. Det ble tatt ut 80 tonn malm i 1882 og 77 tonn i 1883 og skipet til England. Mineraliseringen består av flere linser som opptrer i båndet (mørk grå og hvit) finkornet kalkspatmarmor (prøve 04 er fra ligg). Marmoren har flere opptil meter tykke lag og linser av rusten glimmersk. Ved 579150 7600270 er en vannfylt synk med 30m3 tipp. Malmen er ikke blottet og prøvene 01, 02 og 03 er derfor plukkprøver fra tipp. Det er massiv magnetkismalm med kobberkis, sinkblende og noe svovelkis og blyglans. Ved 579150 7600200 går en transportstoll mot NV minst 70m innover i kalkspat-marmoren uten å treffe mineralisering. Tippen er på ca. 300m3 marmor. Ved 578950 7600210 er det en helt gjenfylt synk i en tilsynelatende annen malmhorisont. Prøve 05 er plukkprøve fra et fåtallig stuffmateriale i fyllmassen. Det er samme type som de forannevnte, men semimassiv.

Bibliography:
From NGU's Reference Archive:
Gustavson, Magne , 1974
Ofoten. Beskrivelse til det berggrunnsgeologiske gradteigskart M 9 - 1:100 000 (med fargetrykt kart).
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL; KARTBESKRIVELSE;NGU; Skrifter; No.310; 15;1-36 + ka pages
Abstract:
The rocks of the map area Ofoten can be roughly subdivided into Precambrian basement and overlying Caledonian rocks. While the Precambrian of the area in general is considered autochthonous, the Caledonian sequence is composed of allochthonous rocks. The allochthonous sequence can be subdivided into 3 units, all consisting mainly of Cambro-Silurian metasediments (marbles, mica schists and - gneisses, quartzites etc.). The lowermost unit, present in the westernmost areas only, can probably be correlated with the Abisko Nappe of the TornetrÌsk Area of Sweden. The middle unit, embracing the Varvik, Bogen and Evenes Groups, corresponds to the Seve-KÎli Nappe Complex. Deformed Precambrian granite is met with at the base of this unit. The uppermost part of the sequence, the Niingen Group, must most probably be considered as a seperate overthrust unit. The deformation of the rocks during the Caledonian orogeny occurred in 3 episodes: 1. During the F1 episode isoclinal and subisoclinal folds with an axial plane schistosity developed. The F1 folds can be observed only on outcrop scale but some indications of large-scale F1 folds exist.

Fieldsamples
Sample No. Sample type Miscellanrous
NO0286.01 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Massiv po med cpy, sl, ga og py.
No. of registrated element analyses = 1
NO0286.02 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Massiv po med cpy, sl, ga og py.
No. of registrated element analyses = 1
NO0286.03 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Massiv po med cpy, sl, ga og py.
No. of registrated element analyses = 1
NO0286.04 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Kalkspatmarmor fra ligg.
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: 3132 24,01,00)

Location
County: Nordland Municipality: Evenes (1853)
Map 1:50000: Astafjorden (1332-2) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 579150 m. North: 7600200 m.
Longitude: 16.9356900 Latitude: 68.5030880
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu Zn Pb
Resources and production
Activity: Test mining Reserves:
Operating method: Underground mining Historical production:


Information(s) in free text format
Free text
Her går en transportstoll mot NV minst 70m innover i kalkspat-marmoren uten å treffe mineralisering. Tippen er på ca. 300m3 marmor.

Name of Locality: Skjerp 2
(Object Id: 3133 24,02,00)

Location
County: Nordland Municipality: Evenes (1853)
Map 1:50000: Astafjorden (1332-2) Map 1:250000: Narvik
Coordinate system: EU89-UTM Zone 33
East: 578952 m. North: 7600206 m.
Longitude: 16.9308780 Latitude: 68.5032010
Show on map

Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu Zn Pb
Resources and production
Activity: Test mining Reserves:
Operating method: Underground mining Historical production:


Information(s) in free text format
Free text
Her er det en helt gjenfylt synk i en tilsynelatende annen malmhorisont. Prøve 05 er plukkprøve fra et fåtallig stuffmateriale i fyllmassen. Det er samme type som de forannevnte, men semimassiv.

Fieldsamples
Sample No. Sample type Miscellanrous
NO0286.05 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Semimassiv po med cpy, sl, ga og py.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 1853 - 024 Lakså

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#
NO0286.01 Bedrock 5420 44200 5550 169 54 -16.2 7.0
NO0286.02 Bedrock 10200 55800 6960 135 -32 -16.2 3.0
NO0286.03 Bedrock 9760 33900 2890 132 40 -16.2 4.0
NO0286.04 Bedrock 96 189 37 1 2 -1.0 1.0
NO0286.05 Bedrock 8610 77200 1770 74 -32 -16.2 14.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*
NO0286.01 3.0 7.0 -20 92.9 -16 18.60 -20 -20 73
NO0286.02 3.0 5.0 -20 108.0 -16 27.20 -20 -20 121
NO0286.03 3.0 3.0 -20 64.2 -16 25.30 -20 -20 38
NO0286.04 3.0 3.0 38 -1.0 29 -1.00 -20 -20 -20
NO0286.05 3.0 7.0 -20 148.0 -16 18.10 -20 -20 27
------------------
Sample No. S% V* Cr* Mn* Fe% Th* U* Sr* La*
NO0286.01 27.80 77 -16 747 44.90 -30.00 -30.00 39.6 25.50
NO0286.02 23.20 64 -16 1470 34.10 32.00 -30.00 109.0 22.70
NO0286.03 25.20 77 -16 623 41.30 -30.00 -30.00 33.3 27.00
NO0286.04 .09 13 2 3450 .38 -30.00 -30.00 303.0 3.34
NO0286.05 15.60 40 -16 1030 20.70 -30.00 -30.00 63.8 -16.20
------------------
Sample No. B*
NO0286.01 -81
NO0286.02 -81
NO0286.03 -81
NO0286.04 6
NO0286.05 -81


The fact sheet was created on 18.10.2021

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