Faktarka for Forekomstområde 1824

					English version
	MALMDATABASEN
	Forekomstområde 1824 - 011
	(Sist oppdatert 28.apr.2020)

Navn på deposit area : Skravlåga

(Objekt Id : 1824,011,00,00)

Lokalisering

Fylke :

Nordland (18)

Kommune :

Vefsn (1824)

Kart 1:50000:

Elsfjord (1927-3)

Kart 1:250000:

Mo i Rana

Markeringspunkt:

Lengdegrad:

13.4647700

Breddegrad:

66.1154930

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-koord:

430642 m.

Y-koord:

7333633 m.

Materialtype

	Hovedtype:	Jernmetaller (Fe, Mn, Ti)	Subtype:	Jern
			Element(s):	Fe

Production

Activity:	Prospektering	Reserves:	6510 thousand tons
Prod. method:		Production:
Prod. status:		Volume of dump:

Betydning

Offentlig: Little Importance (reg. 18.02.2015)

Economical: Lite viktig , (Confirmed 26.jun.2001 by Jan Sverre Sandstad)

Products

Element/product Crude ore grade or quality

FE 25 %

FE_MAG 12 %

Operations

From - To Activity Comments

1974 - 1975 Geology Company/Institution :Rana Gruber

1976 - 1976 Geophysics Company/Institution :Rana Gruber

Mineralization

Era: Proterozoic Period: Neoproterozoic

Dating: Method:

Genesis: Sedeks Form: Lag

Main texture: Båndet Min. distribution: Semi-massiv

Main grain size: Finkornet (<1 mm) Main alteration:

Strike/Dip: 35 / 80 Direction: 50

Plunge: 18

Stratigraphic classification of host rock

Era: Proterozoic Period: Neoproterozoic

Province: Caledonides

Geotec.unit: Helgeland Nappe Complex

Tectonic complex: Elsfjord unit

Igneous complex:

Group: Elsfjord-gruppen Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Epidote Major mineral (>10%)

Gangue mineral Carbonate Subordinate mineral (1-10%)

Gangue mineral Apatite Accessory mineral (<1%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Hematite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Unknown Karb.-aktinolittba. Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Unknown Amfibolitt Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Structures

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

Unknown Primary layering Strike/Dip :50 / 80 Syn-mineralisation ;...Effect :None

Opplysning(er) i fritekstformat

Fri tekst

Skravlåga hem.mt.-malm ----------------------------------- De viktigste malmsteder er: m.o.h. Tykkelse Lengde UTM-øst - nord ------------------------------------------------------- Skravlåga hovedmalm 260-350 20 m 600 m 430700 -7333850 Tebordet, Skravlåga forts. m. SV 350-425 10 m 800 m 429900 -7333000 Nordrishaugen 390-450 10 m 600 m 429850 -7332850 Modalen 375-390 30 m 300 m 425050 -7332350 Tonnasjen er: Tykkelse Lengde Dyp Tonnasje (sp.v. 3,0) -------------------------------------------- Skravlåga hovedmalm 20 m 600 m 100 m 3600000 tonn Tebordet 10 m 800 m 50 m 1200000 " Nordrishaugen 10 m 600 m 50 m 900000 " Modalen 30 m 300 m 30 m 810000 " --------------------- Sum 6510000 tonn Kjemisk analyse av 11 utplukkede rike håndstykker (Norsk Jernverk lab. 1974) gir følgende aritmetiske middelverdier: 31,5 % Fe-total, 30,3 % Fe-HCl, 22,5 % Fe-magn., 0,17 % P og spor av S. Ved eventuell drift vil råmalmgehalten ligge på maksimalt 25 % Fe-total og 12 % Fe-magn.

Fieldsamples

Sample No. Sample type Miscellanrous

JS_FE1704 Bedrock

Sampler :J.S. Sandstad

Kommentar :Hematite+magnetite ore, massive

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

JS_FE1705 Bedrock

Sampler :J.S. Sandstad

Kommentar :Magnetite-hematite, banded, calc-epidote-biotite-amphibole matrix

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

JS_FE1706 Bedrock

Sampler :J.S. Sandstad

Kommentar :Magnetite-hematite, banded, calc-biotite-amphibole matrix

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

NO0698.01 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Kommentar :Fink., båndet mt-hm-malm, gjennomsnittsprøve.

No. of registrated element analyses = 1

NO0698.02 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Kommentar :Båndet hm-min. i amfibolitt.

No. of registrated element analyses = 1

NO0698.03 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Kommentar :Semimassiv mt-hm i amf.

No. of registrated element analyses = 1

NO0698.04 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Kommentar :Massiv mt-malm.

No. of registrated element analyses = 1

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

Navn på sample point : Skravlåga dam

(Objekt Id : 1824,011,00,01)

Lokalisering

Fylke : Nordland (18) Kommune : Vefsn (1824)

Kart 1:50000: Elsfjord (1927-3) Kart 1:250000: Mo i Rana

Markeringspunkt: Lengdegrad: 13.4619420 Breddegrad: 66.1164360

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-koord: 430516 m. Y-koord: 7333741 m.

Materialtype

Hovedtype: Jernmetaller (Fe, Mn, Ti) Subtype: Jern

Element(s): Fe

Fieldsamples

Sample No. Sample type Miscellanrous

JS_FE1708 Bedrock

Sampler :J.S. Sandstad

Kommentar :Magnetite, massive, fine grained in amphibole matrix

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

Forekomstområde 1824 - 011 Skravlåga

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#

JS_FE1704 Bedrock 3 27 1 15 15 1.7

JS_FE1705 Bedrock 2 24 1 10 11 1.5

JS_FE1706 Bedrock 5 13 1 9 12 -.5

JS_FE1708 Bedrock 7 22 1 6 12 .8

NO0698.01 Bedrock 28 17 -3 3 17 -.3 6.0

NO0698.02 Bedrock 6 15 -3 1 8 -.3 -2.0

NO0698.03 Bedrock 11 13 3 3 13 -.3 5.0

NO0698.04 Bedrock 24 10 6 1 12 -.3 -2.0

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

Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sn* Sb*

JS_FE1704 2 616 0.70 1

JS_FE1705 1 374 0.50 -1

JS_FE1706 1 151 0.60 -1

JS_FE1708 -1 207 0.80 1

NO0698.01 -3.0 -3.0 -5.0 -2 .5 17 3.00 -2

NO0698.02 -3.0 -3.0 -5.0 3 .4 14 1.00 -2

NO0698.03 -3.0 -3.0 -5.0 4 1.6 8 1.00 4

NO0698.04 -3.0 -3.0 -5.0 2 2.1 17 -1.00 -2

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

Sample No. Bi* Se* Ga* S% V* Cr* Mn* Fe% Th*

JS_FE1704 -0.50 8.10 116 3.90

JS_FE1705 -0.50 6.20 82 2.50

JS_FE1706 -0.50 5.10 66 2.90

JS_FE1708 3.30 7.80 92 4.30

NO0698.01 13 -.01 40 24 707 14.74 2.00

NO0698.02 3 -.01 35 23 610 7.10 3.00

NO0698.03 23 -.01 37 17 549 26.76 2.00

NO0698.04 29 -.01 56 46 595 32.60 3.00

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

Sample No. U* W* Rb* Sr* Y* Zr* Nb* Ta* Cs*

JS_FE1704 1.00 -1 50.6 357.5 24.1 83 6.90 0.40 2.40

JS_FE1705 0.60 1 47.1 200.8 19.8 68 5.10 0.30 2.10

JS_FE1706 0.60 1 23.1 375.9 21.4 67 6.30 0.40 0.40

JS_FE1708 1.10 -1 22.1 289.4 30.5 108 7.50 0.50 1.60

NO0698.01 -5.00 -2 72.0

NO0698.02 -5.00 -2 74.0

NO0698.03 -5.00 -2 12.0

NO0698.04 -5.00 -2 35.0

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

Sample No. La* Ce* Pr* Nd* Sm* Eu* Gd* Tb* Dy*

JS_FE1704 29.90 67.00 7.78 32.70 6.07 1.31 5.74 0.86 5.03

JS_FE1705 15.70 32.90 4.01 16.40 3.11 0.71 3.12 0.49 3.25

JS_FE1706 16.80 34.20 4.01 15.30 3.06 0.79 3.34 0.54 3.39

JS_FE1708 22.60 45.40 5.62 23.30 4.22 0.94 4.39 0.71 4.40

NO0698.01 6.00

NO0698.02 10.00

NO0698.03 4.00

NO0698.04 5.00

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

Sample No. Ho* Er* Tm* Yb* Lu* B* Be* Hf*

JS_FE1704 0.93 2.80 0.39 2.41 0.37 -1 2.10

JS_FE1705 0.65 2.12 0.29 2.02 0.32 1 1.40

JS_FE1706 0.72 2.20 0.33 2.07 0.35 -1 1.70

JS_FE1708 0.96 2.95 0.43 2.85 0.45 -1 2.80

NO0698.01 -3

NO0698.02 -3

NO0698.03 -3

NO0698.04 -3

Oxide analyses
( All values are in % )

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

JS_FE1704 Bedrock 18.20 4.53 0.42 68.40 0.59 2.35 3.42

JS_FE1705 Bedrock 33.00 4.47 0.31 51.20 0.15 3.90 4.64

JS_FE1706 Bedrock 39.10 4.47 0.38 37.30 0.39 3.09 9.76

JS_FE1708 Bedrock 42.90 6.47 0.60 35.80 0.01 3.21 6.58

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

Sample No. Na2O K2O P2O5 Loss Sum

JS_FE1704 0.86 1.24 0.92 -1.33 100.00

JS_FE1705 0.59 1.36 0.40 -0.89 99.00

JS_FE1706 0.61 0.61 0.52 2.67 99.00

JS_FE1708 1.16 0.76 0.97 0.54 99.00

	Element/product	Crude ore grade or quality
	FE	25 %
	FE_MAG	12 %

From - To	Activity	Comments
1974 - 1975	Geology	Company/Institution :Rana Gruber
1976 - 1976	Geophysics	Company/Institution :Rana Gruber

Era:	Proterozoic	Period:	Neoproterozoic
Dating:		Method:
Genesis:	Sedeks	Form:	Lag
Main texture:	Båndet	Min. distribution:	Semi-massiv

	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	Epidote	Major mineral (>10%)
Gangue mineral	Carbonate	Subordinate mineral (1-10%)
Gangue mineral	Apatite	Accessory mineral (<1%)
Ore mineral	Magnetite	Major mineral (>10%)
Ore mineral	Hematite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Unknown	Karb.-aktinolittba.	Extrusive Original rock :Basalt
		Metamorphic facies :Amphibolite
Unknown	Amfibolitt	Extrusive Original rock :Basalt
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Primary layering	Strike/Dip :50 / 80	Syn-mineralisation ;...Effect :None

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS_FE1704	Bedrock	3	27	1	15	15		1.7
JS_FE1705	Bedrock	2	24	1	10	11		1.5
JS_FE1706	Bedrock	5	13	1	9	12		-.5
JS_FE1708	Bedrock	7	22	1	6	12		.8
NO0698.01	Bedrock	28	17	-3	3	17	-.3	6.0
NO0698.02	Bedrock	6	15	-3	1	8	-.3	-2.0
NO0698.03	Bedrock	11	13	3	3	13	-.3	5.0
NO0698.04	Bedrock	24	10	6	1	12	-.3	-2.0

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sn*	Sb*
JS_FE1704				2		616	0.70	1
JS_FE1705				1		374	0.50	-1
JS_FE1706				1		151	0.60	-1
JS_FE1708				-1		207	0.80	1
NO0698.01	-3.0	-3.0	-5.0	-2	.5	17	3.00		-2
NO0698.02	-3.0	-3.0	-5.0	3	.4	14	1.00		-2
NO0698.03	-3.0	-3.0	-5.0	4	1.6	8	1.00		4
NO0698.04	-3.0	-3.0	-5.0	2	2.1	17	-1.00		-2

Sample No.	Bi*	Se*	Ga*	S%	V*	Cr*	Mn*	Fe%	Th*
JS_FE1704		-0.50	8.10		116				3.90
JS_FE1705		-0.50	6.20		82				2.50
JS_FE1706		-0.50	5.10		66				2.90
JS_FE1708		3.30	7.80		92				4.30
NO0698.01	13			-.01	40	24	707	14.74	2.00
NO0698.02	3			-.01	35	23	610	7.10	3.00
NO0698.03	23			-.01	37	17	549	26.76	2.00
NO0698.04	29			-.01	56	46	595	32.60	3.00

Sample No.	La*	Ce*	Pr*	Nd*	Sm*	Eu*	Gd*	Tb*	Dy*
JS_FE1704	29.90	67.00	7.78	32.70	6.07	1.31	5.74	0.86	5.03
JS_FE1705	15.70	32.90	4.01	16.40	3.11	0.71	3.12	0.49	3.25
JS_FE1706	16.80	34.20	4.01	15.30	3.06	0.79	3.34	0.54	3.39
JS_FE1708	22.60	45.40	5.62	23.30	4.22	0.94	4.39	0.71	4.40
NO0698.01	6.00
NO0698.02	10.00
NO0698.03	4.00
NO0698.04	5.00

Sample No.	Ho*	Er*	Tm*	Yb*	Lu*	B*	Be*	Hf*
JS_FE1704	0.93	2.80	0.39	2.41	0.37		-1	2.10
JS_FE1705	0.65	2.12	0.29	2.02	0.32		1	1.40
JS_FE1706	0.72	2.20	0.33	2.07	0.35		-1	1.70
JS_FE1708	0.96	2.95	0.43	2.85	0.45		-1	2.80
NO0698.01						-3
NO0698.02						-3
NO0698.03						-3
NO0698.04						-3

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JS_FE1704	Bedrock	18.20	4.53	0.42	68.40	0.59	2.35	3.42
JS_FE1705	Bedrock	33.00	4.47	0.31	51.20	0.15	3.90	4.64
JS_FE1706	Bedrock	39.10	4.47	0.38	37.30	0.39	3.09	9.76
JS_FE1708	Bedrock	42.90	6.47	0.60	35.80	0.01	3.21	6.58

Sample No.	Na2O	K2O	P2O5	Loss	Sum
JS_FE1704	0.86	1.24	0.92	-1.33	100.00
JS_FE1705	0.59	1.36	0.40	-0.89	99.00
JS_FE1706	0.61	0.61	0.52	2.67	99.00
JS_FE1708	1.16	0.76	0.97	0.54	99.00