Fact Sheet for <b>Occurence 1806

					Norsk versjon
	THE ORE DATABASE
	Occurence 1806 - 001 Vassåsen
	(Object Id: 2129) (Last updated: 26.04.2020)

Location

County:

Nordland

Municipality:

Narvik (1806)

Map 1:50000:

Evenes (1331-4)

Map 1:250000:

Narvik

Coordinate system:

EU89-UTM Zone 33

East:

574394 m.

North:

7586629 m.

Longitude:

16.8097190

Latitude:

68.3827350

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Test mining	Reserves:	500 thousand tons
	Operating method:	Open pit and underground mining	Historical production:	,5 thousand tons

Products

Element/product Crude ore grade or quality Reg. date

Fe-mag. 17.2 % 04.01.1993

Fe-total 20.7 % 04.01.1993

P 0.25 % 04.01.1993

S 0.018 % 04.01.1993

Operations

From - To Activity Comments

1899 - 1906 Test mining Company/Institution :A/S Håfjellets jernfelter

1935 - 1945 Geology Company/Institution :NGU

1976 - 1977 Geology Company/Institution :Rana Gruber

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: 260 / 60 Direction: 270

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 Amphibole Subordinate mineral (1-10%)

Gangue mineral Epidote Subordinate mineral (1-10%)

Gangue mineral Apatite Subordinate mineral (1-10%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Hematite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Mica schist Sedimentary
Original rock :Greywacke

Metamorphic facies :Amphibolite

Host rock Carbonate mica schist Sedimentary
Original rock :Argillaceous sediment

Metamorphic facies :Amphibolite

Wall rock Calcite marble Sedimentary
Original rock :Limestone

Metamorphic facies :Amphibolite

Structures

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

Unknown Primary layering Strike/Dip :260 / 60 Syn-mineralisation ;...Effect :None

Wall rock Fold axis Strike/Dip :270 / 20 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Det er gitt en beskrivelse av sammenhengen mellom malmen i Heia og Vassåsen i beskrivelsen av Heia. Vassåsen-nivået kan være en foldesjenkel fra en isoklinal folding. Laget av jernformasjone som kan betegnes Vassåsen nivå er fulgt ca. 1200 m langs strøket med den beste mineralisering i Vassåsen.Her er den undersøkt med en stoll (280 m.o.h.) med ca. 300 m3 tipp. I samme område er det 2 større skjæringer, som ble prøvetatt 04.09.92 av Sørdal & Lindahl med 5 representative prøver. Hovedtypene av mineralisering innenfor sonen er prøvetatt. Prøvene er tatt fra heng mot ligg (1-4) i Vassåsen nivå. prøve 5 er tatt som plukkprøve fra tipp i Heia nivå mineralisering. Langs det 1200 m lange utgående er det laget ca. 45 grøfter for prøvetaking og sprengning. Malmtypen er typisk for Håfjellets jernformasjon, stedvis hem.-rik og stedvis magnetitt-rik og mer grovkornet.

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

JSFE1407 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken

Comment: Massive hematite-magnetite ore, medium grained

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

JSFE1408 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken

Comment: Hematite-quartz-amphibole-garnet 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.:

Name of Locality: Vassåsen røsk

(Object Id: 36462 1,01,00)

Location

County: Nordland Municipality: Narvik (1806)

Map 1:50000: Evenes (1331-4) Map 1:250000: Narvik

Coordinate system: EU89-UTM Zone 33

East: 574365 m. North: 7586604 m.

Longitude: 16.8090070 Latitude: 68.3825250

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Resource

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

Element(s): Fe

Resources and production

Activity: Test mining Reserves:

Operating method: Open pit mining Historical production:

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE1406 Bedrock

Sampler: Jan Sverre Sandstad/...Stored: Løkken

Comment: Hematite-quartz-amphibole-garnet 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.:

Name of Locality: Vassåsen stoll

(Object Id: 36463 1,02,00)

Location

County: Nordland Municipality: Narvik (1806)

Map 1:50000: Evenes (1331-4) Map 1:250000: Narvik

Coordinate system: EU89-UTM Zone 33

East: 574488 m. North: 7586682 m.

Longitude: 16.8120530 Latitude: 68.3831920

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Resource

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

Element(s): Fe

Resources and production

Activity: Test mining Reserves:

Operating method: Underground mining Historical production:

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE1409 Dump

Sampler: Jan Sverre Sandstad/...Stored: Løkken

Comment: Hematite-quartz-amphibole-garnet 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 1806 - 001 Vassåsen

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*

JSFE1406 Bedrock 1 7 4 235 23 1.3 14

JSFE1407 Bedrock 563 156 1 346 160 3.0 10

JSFE1408 Bedrock 2 3 4 285 11 1.2 3

JSFE1409 Dump 2 6 3 41 13 5.9 6

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

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

JSFE1406 87 0.30 18.70 36 7 4.70 0.05 2.7 272.6

JSFE1407 293 0.50 22.00 29 14 2.50 0.30 0.4 51.8

JSFE1408 7 0.40 31.50 20 14 9.80 0.05 0.6 199.8

JSFE1409 170 0.10 13.60 202 14 2.90 0.30 4.0 179.6

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

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

JSFE1406 32.6 88 6.90 0.30 0.10 18.50 37.80 3.89 15.20

JSFE1407 16.4 65 5.40 0.20 0.05 7.50 14.70 2.11 9.40

JSFE1408 48.1 121 6.80 0.50 0.05 24.90 40.30 4.41 14.00

JSFE1409 13.8 70 10.60 0.40 0.20 14.60 30.90 4.03 17.00

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

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

JSFE1406 3.15 0.92 4.27 0.75 5.00 1.16 3.62 0.60 4.08

JSFE1407 2.14 0.51 2.39 0.37 2.41 0.53 1.71 0.28 2.03

JSFE1408 3.16 1.07 5.41 1.15 7.38 1.68 5.55 0.87 4.99

JSFE1409 3.20 0.63 2.88 0.41 2.35 0.53 1.44 0.23 1.46

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

Sample No. Lu* Hf*

JSFE1406 0.63 2.00

JSFE1407 0.34 1.30

JSFE1408 0.87 3.20

JSFE1409 0.28 1.40

Oxide analyses
( All values are in % )

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

JSFE1406 Bedrock 38.17 4.99 0.65 31.13 13.87 2.16 3.27

JSFE1407 Bedrock 21.97 3.09 0.26 65.74 7.42 1.51 1.16

JSFE1408 Bedrock 31.73 10.33 0.56 26.46 20.65 3.31 4.33

JSFE1409 Dump 25.50 2.14 0.58 64.73 1.17 1.10 1.90

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

Sample No. Na2O K2O P2O5 Loss Sum

JSFE1406 2.84 0.06 0.13 2.13 99.00

JSFE1407 0.01 0.01 0.33 -1.77 100.00

JSFE1408 0.65 0.04 0.06 1.83 100.00

JSFE1409 0.89 0.11 0.37 1.11 100.00

Element/product	Crude ore grade or quality	Reg. date
Fe-mag.	17.2 %	04.01.1993
Fe-total	20.7 %	04.01.1993
P	0.25 %	04.01.1993
S	0.018 %	04.01.1993

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

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

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

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

Relationship	Rock	Origin
Host rock	Mica schist	Sedimentary Original rock :Greywacke
		Metamorphic facies :Amphibolite
Host rock	Carbonate mica schist	Sedimentary Original rock :Argillaceous sediment
		Metamorphic facies :Amphibolite
Wall rock	Calcite marble	Sedimentary Original rock :Limestone
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Unknown	Primary layering	Strike/Dip :260 / 60	Syn-mineralisation ;...Effect :None
Wall rock	Fold axis	Strike/Dip :270 / 20	Post-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Au#	As*
JSFE1406	Bedrock	1	7	4	235	23	1.3	14
JSFE1407	Bedrock	563	156	1	346	160	3.0	10
JSFE1408	Bedrock	2	3	4	285	11	1.2	3
JSFE1409	Dump	2	6	3	41	13	5.9	6

Sample No.	Ba*	Mo*	Ga*	V*	Cr*	Th*	U*	Rb*	Sr*
JSFE1406	87	0.30	18.70	36	7	4.70	0.05	2.7	272.6
JSFE1407	293	0.50	22.00	29	14	2.50	0.30	0.4	51.8
JSFE1408	7	0.40	31.50	20	14	9.80	0.05	0.6	199.8
JSFE1409	170	0.10	13.60	202	14	2.90	0.30	4.0	179.6

Sample No.	Y*	Zr*	Nb*	Ta*	Cs*	La*	Ce*	Pr*	Nd*
JSFE1406	32.6	88	6.90	0.30	0.10	18.50	37.80	3.89	15.20
JSFE1407	16.4	65	5.40	0.20	0.05	7.50	14.70	2.11	9.40
JSFE1408	48.1	121	6.80	0.50	0.05	24.90	40.30	4.41	14.00
JSFE1409	13.8	70	10.60	0.40	0.20	14.60	30.90	4.03	17.00

Sample No.	Sm*	Eu*	Gd*	Tb*	Dy*	Ho*	Er*	Tm*	Yb*
JSFE1406	3.15	0.92	4.27	0.75	5.00	1.16	3.62	0.60	4.08
JSFE1407	2.14	0.51	2.39	0.37	2.41	0.53	1.71	0.28	2.03
JSFE1408	3.16	1.07	5.41	1.15	7.38	1.68	5.55	0.87	4.99
JSFE1409	3.20	0.63	2.88	0.41	2.35	0.53	1.44	0.23	1.46

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JSFE1406	Bedrock	38.17	4.99	0.65	31.13	13.87	2.16	3.27
JSFE1407	Bedrock	21.97	3.09	0.26	65.74	7.42	1.51	1.16
JSFE1408	Bedrock	31.73	10.33	0.56	26.46	20.65	3.31	4.33
JSFE1409	Dump	25.50	2.14	0.58	64.73	1.17	1.10	1.90

Sample No.	Na2O	K2O	P2O5	Loss	Sum
JSFE1406	2.84	0.06	0.13	2.13	99.00
JSFE1407	0.01	0.01	0.33	-1.77	100.00
JSFE1408	0.65	0.04	0.06	1.83	100.00
JSFE1409	0.89	0.11	0.37	1.11	100.00