Fact Sheet for <b>Occurence 5516

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	THE ORE DATABASE
	Occurence 5516 - 001 Årstein
	(Object Id: 1366) (Last updated: 26.04.2020)

Location

County:

Troms

Municipality:

Gratangen (5516)

Map 1:50000:

Gratangen (1432-3)

Map 1:250000:

Narvik

Coordinate system:

EU89-UTM Zone 33

East:

603471 m.

North:

7623435 m.

Longitude:

17.5534130

Latitude:

68.7033690

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Products

Element/product Crude ore grade or quality Reg. date

Fe-mag. 14 % 17.01.1995

Fe-total 20.5 % 17.01.1995

Mn 5.0 % 17.01.1995

P 0.24 % 17.01.1995

Operations

From - To Activity Comments

1922 - 1922 Sampling Company/Institution :Gewerkschaft Exploration

1938 - 1938 Geology Company/Institution :Poulsen, A.O.

1958 - 1958 Test beneficiation Company/Institution :Mortensen, M.

1960 - 1960 Geology Company/Institution :Skjerli & Tan

1961 - 1961 Geology Company/Institution :Mannesmann

1976 - 1976 Geology Company/Institution :Rana Gruber A/S

Mineralization

Era: Proterozoic Period: Neoproterozoic

Genesis: Sedex Form: Layer

Main texture: Banded Min. distribution: Massive (>50 % ore minerals)

Main grain size: Fine grained (< 1 mm) Main alteration:

Strike/Dip: 220 / 20 Direction: 300

Plunge: 20

Stratigraphic classification of host rock

Era: Proterozoic Period: Neoproterozoic

Province: Caledonides

Geotec.unit: Seve-Køli Nappe Complex

Tectonic complex:

Igneous complex:

Group: Bogengruppen Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Hornblende Major mineral (>10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Gangue mineral Apatite Subordinate mineral (1-10%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Hematite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Biotitt-hornbl.sk. Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Wall rock Karbonatgl.skifer Sedimentary
Original rock :Argillaceous sediment

Metamorphic facies :Amphibolite

Wall rock Granatgl.skifer Sedimentary
Original rock :Greywacke

Metamorphic facies :Amphibolite

Wall rock Kalkspatmarmor Sedimentary
Original rock :Limestone

Metamorphic facies :Amphibolite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Wall rock Foliation Strike/Dip :220 / 20

Wall rock Primary layering Strike/Dip :220 / 20 Syn-mineralisation ;...Effect :None

Wall rock Fold axis Strike/Dip :300 / 20

Information(s) in free text format

Free text

The iron formations at Årstein were found in 1920 and several minor investigations have been carried out until 1960’ies (Skjerlie & Tan 1960). Several trenches have been made in densely forested, hilly area. The iron formations were originally supposed to comprise 5-6 layers (‘leier’), but that is assumed to be misleading according to later investigations. Several analytical results have been given, and the estimates by Søvegjarto (MDB) give a low grade iron ore with 20.5 % Fetot and 14 % Femag, Several studies refers to high content of Mn, around 5 % on average. The trenches are strongly overgrown and partly filled. The longest of these could be traced discontinuously for nearly 50 m upwards along a minor stream in steep hillside. The trench is orientated N-S and the foliation of the rocks is about NE-SW with moderate dips towards NW. Fine grained magnetite-garnet (Sample JSFE1211) and medium grained magnetite-amphibole-biotite-quartz (Samples JSFE1212/13) banded iron formations are most common. Due to the cover it is hard to determine the thickness of the iron formations, but previous mapping of this trench has recorded four magnetite-rich layers with thicknesses from 0.15-1.5 m (Skjerlie & Tan 1960). Hornblende-biotite schist occurs in between the iron formations and on top of them. Calcareous mica schist is found beneath. The IF layers in the area are most commonly between 0.5-2 m thick; although up to 5 m thick magnetite-rich layers are observed (Skjerlie & Tan 1960).

Bibliography:

From NGU's Reference Archive:

Skjerlie, Finn J.; Tek Hong Tan , 1960

Befaring. Malm og mineralforekomster / Gratangen og Lavangen herreder. 21-31 oktober 1960.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3155;7 pages

Abstract:

Forts. Forekomstens navn og koordinater: Spansdalen: 6167 - 76262 I tiden 21/10 - 31/10 1960 foretok vi befaringer til en rekke malm- og mineralforekomster i Gratangen og Lavangen herred. Forekomstene er: I Magnetittforekomster ved Årstein (Gratangen) II Magnetitt- manganforekomster Øsevann-Gregusvann (Gratangen) III Magnetittforekomster Reisevann-Storvann (Gratangen) IV Grafitt- og kvartsitt-forekomster, Spansdal (Lavangen) Etter vår oppfatning er det i første rekke Årsteingeltet som kan ha en viss interesse. Samtlige andre av de befarte forekomster kan sansynligvis se bort fra som økonomisk nyttbare. Årstein magnetittforekomster dekker sannsynligvis et relativt stort areal, men malmen må karakteriseres som en fattig oppberedningsmalm (10 - 20 % Fe). Imidlertid er malmen lettknust og gir bra magnetittkonsentrater (65 % ) ved grov knusing. Vi vil foreslå at det blir utført magnetiske bakkemålinger i Årsteinfeltet. Parallelt med de magnetiske målinger, bør området bli geologisk kartlagt, innenfor stikningsnettet. Vi vil bestemt fraråde at det blir diamantboret på det nåværende tidspunkt.

Bøckman, K.L. , 1954

Rapport over Årstein jernmalmfelt i Gratangen herred.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 2070;4 pages

Abstract:

Rapporten omhandler sammendrag og vurdering av fire tidligere rapporter fra feltet, foretatt av henholdsvis J. C. Torgersen (1924), A. Carlson (1930), J. A. Johansson (1937) og A. O. Poulsen (1938). De fire refererte rapporter inneholder opplysninger om malmfeltets utstrekning, malmmektigheter og gehalter, men ingen definitiv avklaring om eventuell drivverdighet. Bergmester Bøckman skisserer derimot i nærværende rapport et arbeidsopplegg med diamantboring (4 hull), røsking samt analyser av borkjernene, m.m. som er ment å gi svar på spørsmålet om feltet er drivverdig eller ikke.

Carlson, A. , 1930

Rapport over reise til Årstein jernmalmfelt i Gratangen.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 68;4 pages

Abstract:

De omgivne bergarter er regionalmetamorfisert kalksten og kvartsglimmerskifer, og feltet tilhDe omgivne bergarter er regionalmetamorfisert kalksten og kvartsglimmerskifer, og feltet tilhører typen av jernmalmforekomster i den nordlandske marmor-glimmerskifer formasjon, kjent fra Dunderland, Bogen, Salangen og flere andre forekomster, hvor jernmalmskiferen inngår som bergartsdannende mineral. Aarsteinforekomsten danner visstnok et tidligere ikke kjent forbindelsesledd mellom endel forekomster ved Øsevann i syd og forekomster i Lavangen i nord. Som konklusjon tør jeg angi at man har å gjøre med et malmfelt av meget betydelig størrelse. Det avgjørende for feltets fremtid er de kvalitative forhold. Den gunstige beliggenhet og de betydelige mektigheter muliggjør en billig dagbrytning.

Poulsen, A.O. , 1938

Rapport over undersøkelsesarbeide ved Årstein, Gratangen, sommeren 1938.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 72;10 pages

Abstract:

Sommerens undersøkelser som har bestått i en systematisk prøvetagning av leiene III og V har klarlagt at malmen er noenlunde jevnt fordelt gjennom alle lag, og at man i disse ikke vil påtreffe anrikninger av en sådan beskaffenhet at de vil ha noen innflytelse på en eventuell utnyttelse av forekomsten. Leie V, sådan som det er blottlagt i skjæring 1 & 2, representerer samlet et meget stort malmkvantum med en mektighet 17 a 20 m. Regner vi med de lag som antageligvis vil kunne utnyttes i de to skjæringer, fåes en samlet mektighet av 17,35 m med en gjennomsnittsgehalt av 22,6 % Fe.

Torgersen, J.C. , 1924

Utskrift av Nordlands Bergmester embeds befaringsprotokoll (Alternativ tittel: Årstein jernmalmfelter.)

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 69;2 pages

Abstract:

Befaringsrapporten fra bergmesteren antyder et malmareal på over 100.000 m2, og malmens mektighet anslås til ca. 5 m. Forekomsten sammenlignes ellers med de vanlige nordlandske jernmalmforekomster knyttet til glimmerskifer/marmor-gruppen.

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE1212 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Magnetite-amphibole-quartz banded mineralisation, medium grained

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

JSFE1213 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Magnetite-quartz-amphibole banded mineralisation

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

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

Name of Sample point: Årstein hovedrøsk N

(Object Id: 36467 1,00,01)

Location

County: Troms Municipality: Gratangen (5516)

Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik

Coordinate system: EU89-UTM Zone 33

East: 603463 m. North: 7623459 m.

Longitude: 17.5532340 Latitude: 68.7035900

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Resource

Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Manganese

Element(s): Fe Mn

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE1211 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Magnetite-garnet banded mineralisation, fine grained

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

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

Name of Locality: Årstein røsk

(Object Id: 36468 1,01,00)

Location

County: Troms Municipality: Gratangen (5516)

Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik

Coordinate system: EU89-UTM Zone 33

East: 603130 m. North: 7623015 m.

Longitude: 17.5445720 Latitude: 68.6997270

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Resource

Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Manganese

Element(s): Fe Mn

Resources and production

Activity: Pitting Reserves:

Operating method: Historical production:

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE1209 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Hornblende gneiss with magnetite disseminations

JSFE1210 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Garnetite with magnetite disseminations , fine grained

Name of Locality: Gratangen veiskjæring

(Object Id: 36469 1,02,00)

Location

County: Troms Municipality: Gratangen (5516)

Map 1:50000: Gratangen (1432-3) Map 1:250000: Narvik

Coordinate system: EU89-UTM Zone 33

East: 604632 m. North: 7621439 m.

Longitude: 17.5799560 Latitude: 68.6850540

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Resource

Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Manganese

Element(s): Fe Mn

Resources and production

Activity: Exploration Reserves:

Operating method: Historical production:

Information(s) in free text format

Free text

In a road-cut south of Gratangen a possible southwards continuation of the iron formation at Åstein can be studied. A 1.2 m thick, fine grained, finely banded magnetite-quartz-hornblende rock (Sample JSFE1206) lies on top of garnet-mica schist. Above the BIF is 30-40 cm thick, banded marble and on top occur fine grained hornblende-biotite schist with magnetite disseminations.

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE1206 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Magnetite-quartz-biotite banded ore, fine grained

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

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

Analyse Results

from

Deposit Area 5516 - 001 Årstein

Element analyses
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)

Sample No. Sample Type Cu* Zn* Pb* Co* Ni* Au# As*

JSFE1206 Bedrock 26 30 3 8 15 3.0 0

JSFE1211 Bedrock 12 15 1 157 89 .8 7

JSFE1212 Bedrock 1 5 1 6 5 4.8 5

JSFE1213 Bedrock 1 8 1 11 7 55.8 5

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

Sample No. Ba* Mo* Ga* V* Cr* Th* U* Rb* Sr*

JSFE1206 338 0.60 7.40 73 82 4.30 0.70 35.9 221.8

JSFE1211 12 0.60 10.10 25 34 2.20 0.05 0.8 52.3

JSFE1212 11 0.50 4.30 68 82 1.60 0.60 0.8 130.6

JSFE1213 15 0.50 5.00 77 62 1.00 0.05 1.1 30.1

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

Sample No. Y* Zr* Nb* Ta* Cs* La* Ce* Pr* Nd*

JSFE1206 24.4 100 8.00 0.50 0.80 22.70 43.40 5.39 22.00

JSFE1211 27.7 96 4.50 0.40 0.05 13.00 28.90 3.85 16.00

JSFE1212 17.2 42 5.10 0.20 0.05 11.30 24.40 2.97 12.50

JSFE1213 13.9 28 1.30 0.05 0.05 9.00 19.90 2.35 10.10

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

Sample No. Sm* Eu* Gd* Tb* Dy* Ho* Er* Tm* Yb*

JSFE1206 4.27 0.94 4.52 0.63 4.37 0.81 2.59 0.37 2.43

JSFE1211 4.21 0.91 4.85 0.67 4.54 0.93 2.63 0.42 2.83

JSFE1212 2.61 0.61 2.96 0.43 2.70 0.58 1.66 0.23 1.41

JSFE1213 1.95 0.48 2.42 0.33 2.24 0.46 1.33 0.19 1.12

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

Sample No. Lu* Hf*

JSFE1206 0.34 2.90

JSFE1211 0.48 2.00

JSFE1212 0.25 0.70

JSFE1213 0.18 0.40

Oxide analyses
( All values are in % )

Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO

JSFE1206 Bedrock 48.45 5.95 0.46 29.76 0.06 3.42 5.13

JSFE1211 Bedrock 39.29 5.73 0.41 42.56 6.81 2.13 3.44

JSFE1212 Bedrock 35.80 1.86 0.18 58.55 0.25 1.45 2.92

JSFE1213 Bedrock 36.80 1.10 0.13 59.47 0.64 1.38 1.73

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

Sample No. Na2O K2O P2O5 Loss Sum

JSFE1206 1.23 1.20 1.12 1.92 99.00

JSFE1211 0.03 0.03 0.65 -0.92 100.00

JSFE1212 0.30 0.09 0.56 -1.25 101.00

JSFE1213 0.31 0.07 0.56 -1.57 101.00

Element/product	Crude ore grade or quality	Reg. date
Fe-mag.	14 %	17.01.1995
Fe-total	20.5 %	17.01.1995
Mn	5.0 %	17.01.1995
P	0.24 %	17.01.1995

From - To	Activity	Comments
1922 - 1922	Sampling	Company/Institution :Gewerkschaft Exploration
1938 - 1938	Geology	Company/Institution :Poulsen, A.O.
1958 - 1958	Test beneficiation	Company/Institution :Mortensen, M.
1960 - 1960	Geology	Company/Institution :Skjerli & Tan
1961 - 1961	Geology	Company/Institution :Mannesmann
1976 - 1976	Geology	Company/Institution :Rana Gruber A/S

Era:	Proterozoic	Period:	Neoproterozoic
Genesis:	Sedex	Form:	Layer
Main texture:	Banded	Min. distribution:	Massive (>50 % ore minerals)

	Province:	Caledonides
	Geotec.unit:	Seve-Køli Nappe Complex
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Hornblende	Major mineral (>10%)
Gangue mineral	Biotite	Subordinate mineral (1-10%)
Gangue mineral	Apatite	Subordinate mineral (1-10%)
Ore mineral	Magnetite	Major mineral (>10%)
Ore mineral	Hematite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Biotitt-hornbl.sk.	Extrusive Original rock :Basalt
		Metamorphic facies :Amphibolite
Wall rock	Karbonatgl.skifer	Sedimentary Original rock :Argillaceous sediment
		Metamorphic facies :Amphibolite
Wall rock	Granatgl.skifer	Sedimentary Original rock :Greywacke
		Metamorphic facies :Amphibolite
Wall rock	Kalkspatmarmor	Sedimentary Original rock :Limestone
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Wall rock	Foliation	Strike/Dip :220 / 20
Wall rock	Primary layering	Strike/Dip :220 / 20	Syn-mineralisation ;...Effect :None
Wall rock	Fold axis	Strike/Dip :300 / 20

	Abstract:
	Befaringsrapporten fra bergmesteren antyder et malmareal på over 100.000 m2, og malmens mektighet anslås til ca. 5 m. Forekomsten sammenlignes ellers med de vanlige nordlandske jernmalmforekomster knyttet til glimmerskifer/marmor-gruppen.

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Au#	As*
JSFE1206	Bedrock	26	30	3	8	15	3.0	0
JSFE1211	Bedrock	12	15	1	157	89	.8	7
JSFE1212	Bedrock	1	5	1	6	5	4.8	5
JSFE1213	Bedrock	1	8	1	11	7	55.8	5

Sample No.	Ba*	Mo*	Ga*	V*	Cr*	Th*	U*	Rb*	Sr*
JSFE1206	338	0.60	7.40	73	82	4.30	0.70	35.9	221.8
JSFE1211	12	0.60	10.10	25	34	2.20	0.05	0.8	52.3
JSFE1212	11	0.50	4.30	68	82	1.60	0.60	0.8	130.6
JSFE1213	15	0.50	5.00	77	62	1.00	0.05	1.1	30.1

Sample No.	Y*	Zr*	Nb*	Ta*	Cs*	La*	Ce*	Pr*	Nd*
JSFE1206	24.4	100	8.00	0.50	0.80	22.70	43.40	5.39	22.00
JSFE1211	27.7	96	4.50	0.40	0.05	13.00	28.90	3.85	16.00
JSFE1212	17.2	42	5.10	0.20	0.05	11.30	24.40	2.97	12.50
JSFE1213	13.9	28	1.30	0.05	0.05	9.00	19.90	2.35	10.10

Sample No.	Sm*	Eu*	Gd*	Tb*	Dy*	Ho*	Er*	Tm*	Yb*
JSFE1206	4.27	0.94	4.52	0.63	4.37	0.81	2.59	0.37	2.43
JSFE1211	4.21	0.91	4.85	0.67	4.54	0.93	2.63	0.42	2.83
JSFE1212	2.61	0.61	2.96	0.43	2.70	0.58	1.66	0.23	1.41
JSFE1213	1.95	0.48	2.42	0.33	2.24	0.46	1.33	0.19	1.12

Sample No.	Lu*	Hf*
JSFE1206	0.34	2.90
JSFE1211	0.48	2.00
JSFE1212	0.25	0.70
JSFE1213	0.18	0.40

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JSFE1206	Bedrock	48.45	5.95	0.46	29.76	0.06	3.42	5.13
JSFE1211	Bedrock	39.29	5.73	0.41	42.56	6.81	2.13	3.44
JSFE1212	Bedrock	35.80	1.86	0.18	58.55	0.25	1.45	2.92
JSFE1213	Bedrock	36.80	1.10	0.13	59.47	0.64	1.38	1.73

Sample No.	Na2O	K2O	P2O5	Loss	Sum
JSFE1206	1.23	1.20	1.12	1.92	99.00
JSFE1211	0.03	0.03	0.65	-0.92	100.00
JSFE1212	0.30	0.09	0.56	-1.25	101.00
JSFE1213	0.31	0.07	0.56	-1.57	101.00