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

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

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 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

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The fact sheet was created on 25.04.2024

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

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