Fact Sheet for Deposit Area 1833

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 1833 - 044
	(Last updated 17.okt.2017)

Name of Deposit Area : Lasken

(Object Id : 1833,044,00,00)

The deposit area belongs to the Province : Dunderlandsdalen jern

Location

County :

Nordland (18)

Municipality :

Rana (1833)

Map 1:50000:

Dunderlandsdal (2027-1)

Map 1:250000:

Mo i Rana

Marking point:

Longitude:

14.8026110

Latitude:

66.4030240

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-coord:

491182 m.

Y-coord:

7364847 m.

Commodity

	Main Type:	Ferrous metals(Fe, Mn, Ti)	Sub Type:	Iron
			Element(s):	Fe P

Production

Activity:	Exploration	Reserves:	13440 thousand tons
Prod. method:		Production:
Prod. status:		Volume of dump:

Importance

Public: Not Assessed (reg. 07.12.2015)

Economical: Could be significant , (Confirmed 25.feb.2005 by Agnes Raaness)

Products

Element/product Crude ore grade or quality

FE 23 %

P 1.2 %

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

Dating: Method:

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 : 1833,044,01,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.8081870 Latitude: 66.4057220

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491432 m. Y-coord: 7365147 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Laskendraget II

(Object Id : 1833,044,02,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.8065080 Latitude: 66.4057200

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491357 m. Y-coord: 7365147 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Laskendraget III

(Object Id : 1833,044,03,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7970440 Latitude: 66.3994270

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 490932 m. Y-coord: 7364447 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Laskendraget IV

(Object Id : 1833,044,04,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7987220 Latitude: 66.3994310

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491007 m. Y-coord: 7364447 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Tørrbekkhaugen I

(Object Id : 1833,044,05,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.8026780 Latitude: 66.3945010

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491182 m. Y-coord: 7363897 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Tørrbekkhaugen II

(Object Id : 1833,044,06,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.8015800 Latitude: 66.3918080

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491132 m. Y-coord: 7363597 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Tørrbekkhaugen III

(Object Id : 1833,044,07,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7993530 Latitude: 66.3904600

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491032 m. Y-coord: 7363447 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Tørrbekkhaugen IV

(Object Id : 1833,044,08,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7993320 Latitude: 66.3931510

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 491032 m. Y-coord: 7363747 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Flattjønntuva I

(Object Id : 1833,044,09,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7837220 Latitude: 66.3868510

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 490332 m. Y-coord: 7363047 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Flattjønntuva II

(Object Id : 1833,044,10,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7865580 Latitude: 66.3880000

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 490460 m. Y-coord: 7363175 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Name of Locality : Tørrbekkhaugen østre

(Object Id : 1833,044,11,00)

Location

County : Nordland (18) Municipality : Rana (1833)

Map 1:50000: Dunderlandsdal (2027-1) Map 1:250000: Mo i Rana

Marking point: Longitude: 14.7960260 Latitude: 66.3868670

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-coord: 490882 m. Y-coord: 7363047 m.

Commodity

Main Type: Ferrous metals(Fe, Mn, Ti) Sub Type: Iron

Element(s): Fe P

Production

Activity: Exploration Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

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

	Element/product	Crude ore grade or quality
	FE	23 %
	P	1.2 %

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

Era:	Proterozoic	Period:	Neoproterozoic
Dating:		Method:
Genesis:	Sedex	Form:	Layer
Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

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%)

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

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

	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.

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