Fact Sheet for <b>Occurence 1824

					Norsk versjon
	THE ORE DATABASE
	Occurence 1824 - 028 Straum
	(Object Id: 2893) (Last updated: 28.04.2020)

Location

County:

Nordland

Municipality:

Vefsn (1824)

Map 1:50000:

Mosjøen (1826-1)

Map 1:250000:

Mosjøen

Coordinate system:

EU89-UTM Zone 33

East:

418702 m.

North:

7317367 m.

Longitude:

13.2109060

Latitude:

65.9667870

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Resource

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

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Products

Element/product Crude ore grade or quality Reg. date

Fe 15 % 22.10.1992

Operations

From - To Activity Comments

1972 - 1972 Geophysics

1978 - 1978 Geology Company/Institution :Rana Gruber

Mineralization

Era: Proterozoic Period: Neoproterozoic

Genesis: Sedex Form: Layer

Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)

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

Strike/Dip: 200 / 70 Direction: 200

Plunge: 20

Stratigraphic classification of host rock

Era: Period:

Province: Caledonides

Geotec.unit: Helgeland Nappe Complex

Tectonic complex: Elsfjord unit

Igneous complex:

Group: Elsfjordgruppen Formation: Jernmalmformasjon

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Carbonate Subordinate mineral (1-10%)

Gangue mineral Apatite Accessory mineral (<1%)

Ore mineral Magnetite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Unknown Karb.-aktinolittb.a. Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Structures

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

Unknown Primary layering Strike/Dip :200 / 70 Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

The iron formation is exposed along the riverbeds of Drevja, ca. 2 km SSW of Almåsen. An approximately 8 m thick sequence of IF is found on the northern side of the riverbank and consists of finely banded, cm-scale magnetite ore in a calcareous amphibolitic matrix (Sample JS_FE1701-02). The strike and dip of the banding is 235°/65°. Calcareous amphibole-mica schist in the west is intensely small-scale folded. Similar schist in the east is locally enriched in disseminated magnetite (Sample JS_FE1703).

Fieldsamples

Sample No. Sample type Miscellanrous

JS_FE1701 Bedrock

Sampler: J.S. Sandstad

Comment: Magnetite, finely banded in calc. amphibole-mica schist

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

JS_FE1702 Bedrock

Sampler: J.S. Sandstad

Comment: Magnetite, finely banded in calc. amphibole-mica schist

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: Prøvepunkt 1

(Object Id: 36454 28,00,01)

Location

County: Nordland Municipality: Vefsn (1824)

Map 1:50000: Mosjøen (1826-1) Map 1:250000: Mosjøen

Coordinate system: EU89-UTM Zone 33

East: 418753 m. North: 7317350 m.

Longitude: 13.2120300 Latitude: 65.9666440

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Resource

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

Element(s): Fe

Fieldsamples

Sample No. Sample type Miscellanrous

JS_FE1703 Bedrock

Sampler: J.S. Sandstad

Comment: Magnetite dissemination in calc. amphibole-mica schist

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 1824 - 028 Straum

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*

JS_FE1701 Bedrock 8 19 1 8 11 1.0 1

JS_FE1702 Bedrock 7 23 1 10 12 .9 1

JS_FE1703 Bedrock 31 73 4 11 26 2.9 1

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

Sample No. Ba* Mo* Sn* Se* Ga* V* Th* U* W*

JS_FE1701 152 0.60 -1 1.20 5.80 79 3.70 0.60 -1

JS_FE1702 249 0.90 -1 -0.50 4.50 57 2.80 0.50 1

JS_FE1703 725 0.60 2 0.90 16.20 122 10.10 2.00 1

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

Sample No. Rb* Sr* Y* Zr* Nb* Ta* Cs* La* Ce*

JS_FE1701 22.2 239.8 20.7 78 6.50 0.40 1.00 18.60 38.80

JS_FE1702 12.4 238.1 14.9 73 5.80 0.40 0.60 17.20 37.10

JS_FE1703 119.7 856.3 23.6 224 20.00 1.30 5.50 32.40 67.60

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

Sample No. Pr* Nd* Sm* Eu* Gd* Tb* Dy* Ho* Er*

JS_FE1701 4.58 18.70 3.75 0.86 3.52 0.56 3.30 0.70 2.21

JS_FE1702 4.22 16.70 3.28 0.73 3.24 0.49 2.87 0.61 1.86

JS_FE1703 7.52 28.30 5.34 1.16 4.97 0.80 4.94 0.97 2.91

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

Sample No. Tm* Yb* Lu* Be* Hf*

JS_FE1701 0.32 2.01 0.31 1 2.00

JS_FE1702 0.25 1.74 0.27 -1 1.80

JS_FE1703 0.42 2.81 0.42 -1 6.10

Oxide analyses
( All values are in % )

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

JS_FE1701 Bedrock 48.70 5.08 0.47 33.70 0.15 3.68 5.18

JS_FE1702 Bedrock 51.50 4.15 0.38 35.00 0.44 3.06 3.30

JS_FE1703 Bedrock 55.20 14.10 1.04 11.90 0.10 4.07 4.32

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

Sample No. Na2O K2O P2O5 Loss Sum

JS_FE1701 0.44 0.59 0.29 1.09 99.00

JS_FE1702 0.65 0.34 0.22 0.22 99.00

JS_FE1703 3.27 2.70 0.21 1.93 99.00

	Element/product	Crude ore grade or quality	Reg. date
	Fe	15 %	22.10.1992

From - To	Activity	Comments
1972 - 1972	Geophysics
1978 - 1978	Geology	Company/Institution :Rana Gruber

Era:	Proterozoic	Period:	Neoproterozoic
Genesis:	Sedex	Form:	Layer
Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:	Caledonides
	Geotec.unit:	Helgeland Nappe Complex
	Tectonic complex:	Elsfjord unit
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Carbonate	Subordinate mineral (1-10%)
Gangue mineral	Apatite	Accessory mineral (<1%)
Ore mineral	Magnetite	Major mineral (>10%)

Relationship	Rock	Origin
Unknown	Karb.-aktinolittb.a.	Extrusive Original rock :Basalt
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Primary layering	Strike/Dip :200 / 70	Syn-mineralisation ;...Effect :None

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Au#	As*
JS_FE1701	Bedrock	8	19	1	8	11	1.0	1
JS_FE1702	Bedrock	7	23	1	10	12	.9	1
JS_FE1703	Bedrock	31	73	4	11	26	2.9	1

Sample No.	Ba*	Mo*	Sn*	Se*	Ga*	V*	Th*	U*	W*
JS_FE1701	152	0.60	-1	1.20	5.80	79	3.70	0.60	-1
JS_FE1702	249	0.90	-1	-0.50	4.50	57	2.80	0.50	1
JS_FE1703	725	0.60	2	0.90	16.20	122	10.10	2.00	1

Sample No.	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*	La*	Ce*
JS_FE1701	22.2	239.8	20.7	78	6.50	0.40	1.00	18.60	38.80
JS_FE1702	12.4	238.1	14.9	73	5.80	0.40	0.60	17.20	37.10
JS_FE1703	119.7	856.3	23.6	224	20.00	1.30	5.50	32.40	67.60

Sample No.	Pr*	Nd*	Sm*	Eu*	Gd*	Tb*	Dy*	Ho*	Er*
JS_FE1701	4.58	18.70	3.75	0.86	3.52	0.56	3.30	0.70	2.21
JS_FE1702	4.22	16.70	3.28	0.73	3.24	0.49	2.87	0.61	1.86
JS_FE1703	7.52	28.30	5.34	1.16	4.97	0.80	4.94	0.97	2.91

Sample No.	Tm*	Yb*	Lu*	Be*	Hf*
JS_FE1701	0.32	2.01	0.31	1	2.00
JS_FE1702	0.25	1.74	0.27	-1	1.80
JS_FE1703	0.42	2.81	0.42	-1	6.10

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JS_FE1701	Bedrock	48.70	5.08	0.47	33.70	0.15	3.68	5.18
JS_FE1702	Bedrock	51.50	4.15	0.38	35.00	0.44	3.06	3.30
JS_FE1703	Bedrock	55.20	14.10	1.04	11.90	0.10	4.07	4.32

Sample No.	Na2O	K2O	P2O5	Loss	Sum
JS_FE1701	0.44	0.59	0.29	1.09	99.00
JS_FE1702	0.65	0.34	0.22	0.22	99.00
JS_FE1703	3.27	2.70	0.21	1.93	99.00