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THE ORE DATABASE
Occurence 1833 - 044 Lasken
(Object Id: 2723)
(Last updated: 17.10.2017)
Belongs to the Province: Dunderlandsdalen jern
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491182 m. North: 7364847 m.
Longitude: 14.8026110 Latitude: 66.4030240
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Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Iron
Element(s): Fe P
Importance
Raw material meaning: Not Assessed (reg. 07.12.2015)

Resources and production
Activity: Exploration Reserves: 13440 thousand tons
Operating method: Historical production:


Products
Element/product Crude ore grade or quality Reg. date
Fe 23 % 10.11.1992
P 1.2 % 10.11.1992

Operations
From - To Activity Comments
1950 - 1950 Pitting
1977 - 1977 Geology Company/Institution :Rana Gruber
1980 - 1980 Core drilling Company/Institution :Rana Gruber

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Sedex Form: Layer
Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration:
Strike/Dip: 200 / 55 Direction: 20
Plunge: 20
Stratigraphic classification of host rock
Era: Period:
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Ørtfjell Formation: Dunderland

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Gangue mineral Garnet Subordinate mineral (1-10%)
Ore mineral Magnetite Major mineral (>10%)
Ore mineral Apatite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Unknown Karb.gl.sk. Sedimentary
Original rock :Argillaceous sediment
Metamorphic facies :Amphibolite
Unknown Amfibolitt Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Unknown Primary layering Strike/Dip :200 / 55 Syn-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Lasken ap.-mt.-malm. --------------------------------- De viktigste malmsteder er: m.o.h UTM-øst UTM-nord --------------------------------------------------------------------------------------- Laskendraget 650 491500 7365350 Laskendraget 650 491425 7365350 Laskendraget 660 491250 7365050 Laskendraget 700 491000 7364650 Laskendraget 700 491075 7364650 Tørrbekkhaugen, Vestre folden 670 491250 7364100 Tørrbekkhaugen, Vestre folden 680 491200 7363800 Tørrbekkhaugen, Vestre folden 690 491100 7363650 Tørrbekkhaugen, Vestre folden 680 491100 7363950 Flattjønntuva 760 490650 7363550 Tørrbekkhaugen østre 690 490950 7363250 Tonnasjen i de tre malmdrag er: Anmerkn. Tykkelse Lengde Dyp Tonnasje (sp.v.3.2) ----------------------------------------------------------------------------------------------------------- Lasken 3 borhull 10m 600m 70m 1344000 tonn Lasken 3 borhull 22-40m (30m) 600m 70m 4032000 " Tørrbekkhaugen 3 borhull 15-30m (20m) 2x600m 70m 5376000 " Flattjønntuva ikke boret 5-40m (10m) 2x600m 70m 2688000 " ------------------ Sum 13440000 tonn Boringen i 1980 (6 hull - tilsammen 498m) viste at Laskendraget inneholder den rikeste mineraliseringen (%): Borkjernegjennomsnitt Grunnlag ------------------------------------------------------------------------------------------------------------ Fe-total Fe-magn. P S Analysesoner Kjernemeter Borhull ------------------------------------------------------------------------------------------------------------ Laskendraget 25,1 19,7 1,47 0,27 29 112,2 3 Tørrbekkhaugen 21,4 16,7 0,90 0,20 28 145 3 Boreresultatene gir lavere verdier enn gj.snittsanalyser utregnet som geometriske middeltall fra 1951 (23,2 % Fe-magn. og 1,225 % P). Plukkprøver i rike malmbånd gir alltid høyere analysetall.

Bibliography:
From NGU's Reference Archive:
Bugge, Jens A.W. , 1948
Rana gruber. Geologisk beskrivelse av jernmalmfeltene i Dunderlandsdalen.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.171;1-149 + f pages
Abstract:
(forkortet) The mining company A/S Rana Gruber has made extensive exploration of the iron ore deposits in Dunderlandsdalren under the leadership of mining engineer Worm Lund and. The field work comprises the following sections: Geodetic works and constructions of topographic maps. - Geology. - Exploration of the ore deposits by diamond drilling. - Exploration of the ground above the solid rocks (for foundation). The present paper gives and outline of the geology. Map 1 illustrates the main geological features of Rana. The sedimenatary rocks belong to the lower part of the sediments of the Caledonian mountain range. They are older than the fossil-bearing Sulitjelma-schists described by Th. Vogt, and are probably of lower Ordovician or Upper Cambrianage age. The most characterisitctic features in the western part of the area illustrate d in map 2 are the graeat folds in with axes striking E-W and dipping 10-20 W There are two anticlinededs seperated by syncline. The northern Bomfjell- anticline is superseded toward south by the Svanheim-syncline and this again by the Nevernes-Lasken anticline. Toward east the fold axes turn from E-W to NNE -SSW, while the pitch varies between NE and SW. The compression of the rocks is higher in the eastern parts than in the western ones.

Bøckman, K.L. , 1948
Rapport over jernmalmfeltene Laksen, Flattjønntuva og Tørbekkhaugene i Dunderlandsdalen, Nord-Rana.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1173;8 pages
Abstract:
Rapporten er en foreløpig beskrivelse av arbeider på de nevnte steder da forfatteren ikke har rukket å utføre det som var planlagt pga. dårlig vær og tidlig snøfall. Forekomstene er nøye oppmålt, med vedlagt kartskisse som viser utstrekning og fall på de forskjellige mineraliseringer. Rapporten avsluttes med forslag til mindre arbeid året etter. Økonomisk kalkyle for dette arbeidet er også gjort.

Brekke, Ottar , 1952
Geologisk og petrografisk beskrivelse av Lasken Jernmalmfelt.
;NTH Bergavd.;AVHANDLING

Thørnquist, C.; Nannestad, F.; Torgersen, J.C. , 1945
Bergmester Torgersens rapport over Laskenfeltet av 1.desember 1922.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1214;4 pages
Abstract:
Rapporten er av tre forskjellige forfattere som beskriver Laskenfeltet i Rana. Den mest fyldige er den første delen som er forfattet av bergmester C. J. Torgersen. Her beskrives malm og sidebergart. Analyser av to "stripeprøver" (antas å være flere sammenslåtte prøver fra tverrprofiler) viser henholdsvis 32,29 % Fe og 38,03 % Fe. Malmen karakteriseres ved høyt fosforinnhold, henholdsvis 3,78 % og 2,72 % i de to analyserte prøver. Til tross for vanskelig adkomst, uttrykkes en viss optimisme m.h.p. drift.

Nannestad, F. , 1946
Laskenfeltets malmmengde.
;Norges geologiske undersøkelse;TEKNISK RAPPORT;Bergarkivet; No.BA 1215;3 pages
Abstract:
Lok. Nr. 40399, 40401. Det er foretatt malmberegning i Laskenfeltet basert på opplysninger i rapporten nr. 1214. Malmmengden beregnes å være ca. 225 mill. tonn. I tillegg er det gjort endel vurderinger m.h.p. drift som synes optimistiske.

Fieldsamples
Sample No. Sample type Miscellanrous
NO0602.01 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Middk. amfibolitt med semimassiv mt.
No. of registrated element analyses = 1
NO0602.02 Bedrock
Sampler: Wilberg, R./...Stored: Løkken
Comment: Fink., båndet mt-min.
No. of registrated element analyses = 1
NO0602.03 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: Laskendraget I
(Object Id: 6898 44,01,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491432 m. North: 7365147 m.
Longitude: 14.8081870 Latitude: 66.4057220
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: Laskendraget II
(Object Id: 6899 44,02,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491357 m. North: 7365147 m.
Longitude: 14.8065080 Latitude: 66.4057200
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: Laskendraget III
(Object Id: 6900 44,03,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 490932 m. North: 7364447 m.
Longitude: 14.7970440 Latitude: 66.3994270
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: Laskendraget IV
(Object Id: 6901 44,04,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491007 m. North: 7364447 m.
Longitude: 14.7987220 Latitude: 66.3994310
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: Tørrbekkhaugen I
(Object Id: 6902 44,05,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491182 m. North: 7363897 m.
Longitude: 14.8026780 Latitude: 66.3945010
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: Tørrbekkhaugen II
(Object Id: 6903 44,06,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491132 m. North: 7363597 m.
Longitude: 14.8015800 Latitude: 66.3918080
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: Tørrbekkhaugen III
(Object Id: 6904 44,07,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491032 m. North: 7363447 m.
Longitude: 14.7993530 Latitude: 66.3904600
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: Tørrbekkhaugen IV
(Object Id: 6905 44,08,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 491032 m. North: 7363747 m.
Longitude: 14.7993320 Latitude: 66.3931510
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: Flattjønntuva I
(Object Id: 6906 44,09,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 490332 m. North: 7363047 m.
Longitude: 14.7837220 Latitude: 66.3868510
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: Flattjønntuva II
(Object Id: 6907 44,10,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 490460 m. North: 7363175 m.
Longitude: 14.7865580 Latitude: 66.3880000
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: Tørrbekkhaugen østre
(Object Id: 6908 44,11,00)
Location
County: Nordland Municipality: Rana (1833)
Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana
Coordinate system: EU89-UTM Zone 33
East: 490882 m. North: 7363047 m.
Longitude: 14.7960260 Latitude: 66.3868670
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 1833 - 044 Lasken

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#
NO0602.01 Bedrock 12 44 9 -1 23 -.3 2.0
NO0602.02 Bedrock 23 28 3 -1 12 -.3 -2.0
NO0602.03 Bedrock 9 23 6 -1 11 -.3 -2.0
------------------
Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*
NO0602.01 -3.0 -3.0 -5.0 -2 2.2 16 2.00 -2 3
NO0602.02 -3.0 -3.0 -5.0 -2 2.4 6 1.00 -2 -2
NO0602.03 -3.0 -3.0 -5.0 -2 3.2 4 3.00 6 2
------------------
Sample No. S% V* Cr* Mn* Fe% Th* U* W* Sr*
NO0602.01 .01 69 28 132 21.57 3.00 -5.00 -2 174.0
NO0602.02 .01 39 14 111 27.06 -2.00 -5.00 -2 246.0
NO0602.03 .04 30 18 155 32.83 -2.00 -5.00 3 145.0
------------------
Sample No. La* B*
NO0602.01 22.00 -3
NO0602.02 7.00 -3
NO0602.03 8.00 6

The fact sheet was created on 05.05.2024
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