Norsk versjon
	THE ORE DATABASE
	Occurence 1806 - 116 Statens kobberskjerp
	(Object Id: 2724) (Last updated: 08.02.2000)

Operations

	From - To	Activity	Comments
	1899 - 1906	Pitting	Company/Institution :A/S Håfellets jernfelter
	1935 - 1945	Geology	Company/Institution :NGU

Mineralization

	Genesis:	Chemical sediment	Form:	Lens
	Main texture:	Banded	Min. distribution:	Disseminated (<20 % ore minerals)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

	Strike/Dip:	270 / 30	Direction:	45
			Plunge:	20

Stratigraphic classification of host rock

Era:

Period:

	Province:	Caledonides
	Geotec.unit:	Ofoten Nappe Complex
	Tectonic complex:	Upper allochton
	Igneous complex:

Group:

Salangen group

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Amphibole	Major mineral (>10%)
	Gangue mineral	Graphite	Subordinate mineral (1-10%)
	Gangue mineral	Calcite	Subordinate mineral (1-10%)
	Gangue mineral	Quartz	Subordinate mineral (1-10%)
	Gangue mineral	Muscovite	Subordinate mineral (1-10%)
	Ore mineral	Sphalerite	Subordinate mineral (1-10%)
	Ore mineral	Pyrite	Subordinate mineral (1-10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)
	Ore mineral	Malachite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Host rock	amphibolite	Intrusive Original rock :Dolerite
			Metamorphic facies :Amphibolite
	Host rock	mixed mica schist with graphit	Sedimentary Original rock :Mudstone
			Metamorphic facies :Amphibolite
	Wall rock	calcite marble	Sedimentary Original rock :Limestone
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Primary layering	Strike/Dip :270 / 20	Syn-mineralisation ;...Effect :None
	Wall rock	Fold axis	Dir./Plunge :50 / 20	Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Navnet tilsier at forekomsten var holdt utenfor jernmalmfeltene i Håfjellet. Mineraliseringen er vekslende glimmerskifer og noe amfibolitt som ligger inne i kalksekvensen. Det ligger litologisk på et nivå mellom Barakkehaugen og Jernhaugen. Sulfidene sitter i smale bånd over noen få meters mektighet i den blandede glimmerskiferen og som impregnasjon av kobberkis - sinkblende og svovelkis. Det er dannet malakitt ved supergen forvitring av sulfidene, som er helt normalt i dette karbonatrike miljø. Statens kobberskjerp er meket av på Foslies kart av 1949. Det består av en hovedskjæring og to mindre grøfter. Undersøkelsen er gjort over et utgående på ca. 100 m. Det er ikke kjent forekomster på dette nivå i strøkretningen. Forekomsten ble prøvetatt i 1992 av Sørdal og Lindahl

Bibliography:

From NGU's Reference Archive:

Foslie, Steinar , 1949

	Håfjellsmulden i Ofoten og dens sedimentære jern-mangan-malmer. Søndre Ofotens malmforekomster II.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.174;1-129 + f pages

Abstract:

The sedimentary hematite-magnetite ores of marine origin, occurring within the crystalline mica schists of the caledonian mountain of Northern Norway, belong to a characteristic type of iron ore deposits, internationally known as the Dunderland ore type. Such deposits are known from latitude 65 degrees 20' to 69 degrees 40' N, thus covering a distance along the mountain chain of about 550 km. Transversely to this direction, they are known for at most 90 km, but generally much less. It is significant, that they do not occur farther southwards along the mountain chain, nor in its eastern part. The reason seems to be, taht they are connected with the so-called western development or the mountain chain formations, which disappear below the ocean in the Trondheim district. Compared with the eastern development, it is characterized by greater thickness of the sedimentary series, a far more considerable part of crystalline limestones and - so faar as now known - absence of the basic lavas (greenstone formation), which are important in the east and south. It belongs to a more central part of the geosyncline. The southern and greater part of the ore-bearing district is so strongly folded, that it has been difficult to establish the stratigraphic relation between the different deposits or their proper place within the formations.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0603.01	Bedrock	Sampler: Lindahl, I./...Stored: Løkken Comment: Kobberkis med malakitt (forvitret). No. of registrated element analyses = 1
	NO0603.02	Bedrock	Sampler: Lindahl, I./...Stored: Løkken Comment: Kobberkis med malakitt og sinkblende (forvitret). No. of registrated element analyses = 1
	NO0603.03	Bedrock	Sampler: Lindahl, I./...Stored: Løkken Comment: Kobberkis- sinkblendemalm i båndet kalk med svovelkis. No. of registrated element analyses = 1

NB! All analyse values are shown at the end of the printout.:

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Analyse Results

from

Deposit Area 1806 - 116 Statens kobberskjerp

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#
NO0603.01	Bedrock	121000	86800	48	65	-16	-8.2	135.0
NO0603.02	Bedrock	108000	94400	93	65	-16	-8.2	137.0
NO0603.03	Bedrock	7020	7940	-41	-8	-16	-8.2	87.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
NO0603.01	3.0	3.0	-20	208.0	-8	-8.20	-20	-20	-20
NO0603.02	3.0	3.0	26	231.0	9	-8.20	-20	-20	-20
NO0603.03	3.0	3.0	-20	27.0	10	-8.20	-20	-20	-20

------------------

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	Sr*	La*
NO0603.01	10.20	44	-8	1600	18.40	-30.00	-30.00	91.8	-8.20
NO0603.02	10.30	50	-8	884	20.00	-30.00	-30.00	58.3	-8.20
NO0603.03	.07	17	-8	1370	1.76	-30.00	-30.00	513.0	-8.20

------------------

Sample No.	B*
NO0603.01	-41
NO0603.02	-41
NO0603.03	-41

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The fact sheet was created on 03.05.2024

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

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