Norsk versjon
	THE ORE DATABASE
	Occurence 1806 - 061 Jernhaugen
	(Object Id: 2502) (Last updated: 07.02.2024)

Products

	Element/product	Crude ore grade or quality	Reg. date
	Fe-mag.	15-33 %	05.02.1999
	Fe-total	33-42 %	05.02.1999
	P	0.15-0.3 %	05.02.1999
	S	.006-.08 %	05.02.1999

Operations

	From - To	Activity	Comments
	1899 - 1906	Pitting	Company/Institution :A/S Håfjellets jernfelter
	1935 - 1945	Geology	Company/Institution :NGU
	1976 - 1977	Geology	Company/Institution :Rana Gruver A/S

Mineralization

	Genesis:	Sedimentary deposit	Form:	Layer
	Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

	Strike/Dip:	280 / 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:

Håfjell iron formation

Mineralogy

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

Lithology:

	Relationship	Rock	Origin
	Host rock	carbonate mica schist	Sedimentary Original rock :Marl
	Host rock	Qauttz mica schist	Sedimentary Original rock :Mudstone
	Wall rock	amphibolite	Intrusive Original rock :Dolerite
			Metamorphic facies :Amphibolite
	Wall rock	Calcite marble	Sedimentary Original rock :Limestone

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Fold axis	Dir./Plunge :45 / 20	Post-mineralisation ;...Effect :Modifies
	Wall rock	Primary layering	Strike/Dip :280 / 30	Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Jernhaugen er ett av 4 jermalmfelter ved Fuglevatnet. Lokalt på selve jernhaugen har forekomsten på grunn av folding betydelig mektighet. Malmen består av flere lag og linser med hematitt og magnetittmalm. Noe fosforik malm opptrer også i denne sekvensen. Malmen er undersøkt med grøting og skjerping. Den totale lengden av utgående som er undersøkt dreier seg om ca. 700 meter. Det er gravd ca 50 grøfter over forekomsten som strekker seg fra Jernhaugen og østover inn i en bred dal. Mindre aktivitet kan finnes ytterligere lengre mot NØ med noen små grøfter. Se forøvrig Foslie (1949). Som ellers i jernformasjonen ligger jernmalmene i tynne glimmerskifre inne i karbonatsekvensen.

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
	NO0364.01	Bedrock	Sampler: Lindahl, I./...Stored: Løkken Comment: Rich magnetite- hematite ore. No. of registrated element analyses = 1
	NO0364.02	Bedrock	Sampler: Lindahl, I./...Stored: Løkken Comment: Coarse grained magnetite ore. No. of registrated element analyses = 1
	NO0364.03	Bedrock	Sampler: Lindahl, I./...Stored: Løkken Comment: Magnetite ore with pyrite content. No. of registrated element analyses = 1
	N-25	Bedrock	Sampler: Bjerkgård/Raaness/...Stored: Løkken Comment: coarse grained magnetite No. of registrated oxide analyses = 1

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

Name of Sample point: Prøvepunkt

(Object Id: 39470 61,00,01)

Location

County:

Nordland

Municipality:

Narvik (1806)

Map 1:50000:

Evenes (1331-4)

Map 1:250000:

Narvik

Coordinate system:

EU89-UTM Zone 33

East:

568792 m.

North:

7583595 m.

Longitude:

16.6715300

Latitude:

68.3569610

Show on map

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron
			Element(s):	Fe

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	N-26	Bedrock	Sampler: Bjerkgård/Raaness/...Stored: Løkken Comment: garnet-amphibole-magnetite No. of registrated oxide analyses = 1

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

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Analyse Results

from

Deposit Area 1806 - 061 Jernhaugen

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#
NO0364.01	Bedrock	12	884	2	68	55	.4	73.0
NO0364.02	Bedrock	8	1457	7	45	21	.4	1.0
NO0364.03	Bedrock	50	574	2	34	22	.1	21.0

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

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
NO0364.01	3.0	3.0	2	1.5	93	1.00	2	2	.04
NO0364.02	3.0	3.0	2	4.1	40	1.00	2	4	.06
NO0364.03	3.0	3.0	2	.2	16	1.00	2	2	7.20

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

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
NO0364.01	24	15	16434	21.57	2.00	5.00	1	117.0	4.00
NO0364.02	27	12	8827	17.72	2.00	5.00	1	194.0	7.00
NO0364.03	26	15	2069	26.54	2.00	5.00	1	46.0	6.00

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

Sample No.	B*
NO0364.01	2
NO0364.02	2
NO0364.03	5

Oxide analyses

( All values are in % )

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
N-25	Bedrock	50.68	2.89	0.22	41.72	0.09	1.95	1.31
N-26	Bedrock	52.15	3.71	0.28	39.18	0.16	2.62	1.69

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

Sample No.	Na2O	K2O	P2O5	Loss	Sum
N-25	1.01	0.38	0.38	-0.74	100.00
N-26	0.02	0.03	0.44	-0.32	100.00

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The fact sheet was created on 08.05.2024

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

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