Norsk versjon
	THE ORE DATABASE
	Occurence 1824 - 010 Rallkattmalmen
	(Object Id: 2809) (Last updated: 24.01.2018)

Products

	Element/product	Crude ore grade or quality	Reg. date
	Fe-mag.	10 %	30.10.1992
	Fe-total	25 %	30.10.1992

Operations

	From - To	Activity	Comments
	1974 - 1975	Geology	Company/Institution :Rana Gruber
	1976 - 1976	Geophysics	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:	230 / 90	Direction:	210
			Plunge:	60

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:

Jernmalm-formasjon

Mineralogy

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

Lithology:

	Relationship	Rock	Origin
	Unknown	Amfibolitt	Extrusive Original rock :Basalt
			Metamorphic facies :Amphibolite
	Unknown	Granodioritt	Intrusive Original rock :Granodiorite
			Metamorphic facies :Amphibolite
	Unknown	Karbonat-aktinolitt	Extrusive Original rock :Basalt
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Primary layering	Strike/Dip :230 / 90	Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

The Rallkattmalmen deposit is one out of several iron ore deposits in the Vefsn metallogenic area. It is likely that the ores and their host rocks, represent a continuation of those in Dunderlandsdalen. The ores in the Vefsn district are exclusively magnetite-haematite ores, containing only 0.15 – 0.3 % P. Most of the occurrences are in a sequence of mica schists, garnetiferous below the ores, and actinolite-carbonate-bearing above, the schists themselves occurring in a sequence dominated by dolomitic and calcitic marbles. The three most important deposits in the area are Fuglestrand, with resources of >13 Mt, Rallkatt with 19 Mt and Seljeli with 30 Mt of potential ore. Fuglestrand contains 37 %, Rallkatt 30 % and Seljeli 19 % Fetot. The content of P is <0.3 % in all three. Magnetite is the predominant ore mineral at Fuglestrand, with lesser haematite; the reverse is the case at Seljeli and at Rallkatt the amounts are about equal. The dominant gangue minerals at Fuglestrand and Rallkatt are quartz, amphibole, epidote and calcite, and at Seljeli quartz, calcite, amphibole, biotite, chlorite and epidote. The iron formation is exposed over a width of around 200 m at the Kanglitinden where the location for the Rallkatt deposit is registered. The width might be due to repetition caused by folding, but it is hard to clarify as the sequence is intruded by numerous felsic (granitic to tonalitic) dykes). Both hematite and magnetite are enriched in bands with thicknesses from a few mm to few dm (Samples JS_FE1713-14). Weaker dissemination of Fe-oxide occurs in epidote-amphibole-carbonate rich bands in-between the enriched Fe-oxide bands.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0697.01	Bedrock	Sampler: Wilberg, R./...Stored: Løkken Comment: Fe-malm fra U. Søvegjarto. No. of registrated element analyses = 1

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

Name of Sample point: Prøvepunkt 1

(Object Id: 36441 10,00,01)

Location

County:

Nordland

Municipality:

Vefsn (1824)

Map 1:50000:

Elsfjord (1927-3)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

432539 m.

North:

7335746 m.

Longitude:

13.5056480

Latitude:

66.1348630

Show on map

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	JS_FE1713	Bedrock	Sampler: J.S. Sandstad Comment: Magnetite-hematite, massive, epidote-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.:

Name of Sample point: Prøvepunkt 2

(Object Id: 36442 10,00,02)

Location

County:

Nordland

Municipality:

Vefsn (1824)

Map 1:50000:

Elsfjord (1927-3)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

432619 m.

North:

7335665 m.

Longitude:

13.5074620

Latitude:

66.1341540

Show on map

Resource

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	JS_FE1714	Bedrock	Sampler: J.S. Sandstad Comment: Magnetite-hematite, massive, epidote-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.:

Name of Sample point: Prøvepunkt 3

(Object Id: 36443 10,00,03)

Location

County:

Nordland

Municipality:

Vefsn (1824)

Map 1:50000:

Elsfjord (1927-3)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

432212 m.

North:

7335333 m.

Longitude:

13.4986050

Latitude:

66.1310890

Show on map

Resource

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

Information(s) in free text format

Free text

The iron formation is around 15 m thick NNE of Prøvepunkt 4 and a relatively hematite-rich sample was collected closer to the Kanglitinden (Sample JS_FE1712).

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	JS_FE1712	Bedrock	Sampler: J.S. Sandstad Comment: Magnetite-hematite, banded, calc-epidote-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.:

Name of Sample point: Prøvepunkt 4

(Object Id: 36444 10,00,04)

Location

County:

Nordland

Municipality:

Vefsn (1824)

Map 1:50000:

Elsfjord (1927-3)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

431258 m.

North:

7334328 m.

Longitude:

13.4780470

Latitude:

66.1218610

Show on map

Resource

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

Information(s) in free text format

Free text

The section observed at Skravlåga can be followed further NNE up on Flatafjellet og Kanglitinden. Tectonostratigraphically in the bottom (in W) occurs dolomitic schist/diamictite with foliation 35°/80° overlain by iron formation, which locally is in contact with amphibolite. At the top (in E) exists (staurolite)-garnet-mica schist. Only few, scattered dolomite clasts occur in the calcareous schist similar to the diamictite sequence by the river. Locally, cm-thin bands of magnetite are also found weithin this unit. The iron formation is 2 to 10 m thick and consists of finely banded magnetite-hematite ore (Sample JS_FE17011).

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	JS_FE1711	Bedrock	Sampler: J.S. Sandstad Comment: Magnetite-hematite, banded, calc-epidote-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

Deposit Area 1824 - 010 Rallkattmalmen

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_FE1711	Bedrock	6	27	2	10	14		-.5
JS_FE1712	Bedrock	5	17	1	7	11		.6
JS_FE1713	Bedrock	4	20	2	7	13		1.2
JS_FE1714	Bedrock	2	16	1	8	10		-.5
NO0697.01	Bedrock	26	7	2	9	8	.1	1.0

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

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS_FE1711			1		92	0.50	-1
JS_FE1712			3		50	0.60	-1
JS_FE1713			3		64	0.80	-1
JS_FE1714			1		51	0.40	1
NO0697.01	3.0	3.0	2	.2	5	1.00		2	2

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

Sample No.	Se*	Ga*	S%	V*	Cr*	Mn*	Fe%	Th*	U*
JS_FE1711	0.70	5.60		77				3.10	0.70
JS_FE1712	-0.50	7.00		107				4.00	1.60
JS_FE1713	-0.50	4.00		77				2.50	1.00
JS_FE1714	-0.50	7.20		97				3.40	0.80
NO0697.01			.02	26	18	696	9.65	2.00	5.00

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

Sample No.	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*	La*
JS_FE1711	1	16.5	211.5	26.3	72	7.10	0.40	0.10	18.00
JS_FE1712	1	9.7	280.3	34.2	76	10.10	0.40	0.30	23.50
JS_FE1713	1	21.2	182.1	28.1	53	4.90	0.30	0.50	17.90
JS_FE1714	-1	9.7	321.9	20.2	74	9.10	0.60	0.20	18.50
NO0697.01	1		34.0						6.00

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

Sample No.	Ce*	Pr*	Nd*	Sm*	Eu*	Gd*	Tb*	Dy*	Ho*
JS_FE1711	38.10	4.35	17.90	3.63	0.90	3.81	0.61	3.90	0.93
JS_FE1712	50.90	5.88	24.80	4.92	1.19	5.62	0.94	6.10	1.31
JS_FE1713	36.50	4.51	18.70	4.26	1.06	4.76	0.75	4.64	1.01
JS_FE1714	38.90	4.51	17.90	3.45	0.84	3.27	0.53	3.22	0.70
NO0697.01

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

Sample No.	Er*	Tm*	Yb*	Lu*	B*	Be*	Hf*
JS_FE1711	2.62	0.39	2.70	0.42		-1	1.60
JS_FE1712	3.69	0.52	3.34	0.55		6	1.70
JS_FE1713	2.93	0.43	2.71	0.43		-1	1.40
JS_FE1714	2.21	0.30	2.01	0.29		-1	1.90
NO0697.01					2

Oxide analyses

( All values are in % )

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JS_FE1711	Bedrock	41.60	4.49	0.40	42.00	0.34	3.20	6.20
JS_FE1712	Bedrock	20.80	4.25	0.39	62.40	0.31	2.87	6.42
JS_FE1713	Bedrock	36.10	3.20	0.31	50.60	0.22	1.80	5.05
JS_FE1714	Bedrock	37.90	4.61	0.44	39.20	0.42	4.43	12.40

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

Sample No.	Na2O	K2O	P2O5	Loss	Sum
JS_FE1711	0.58	0.57	0.82	-0.77	99.00
JS_FE1712	0.46	0.36	1.22	-0.47	99.00
JS_FE1713	0.47	0.55	1.26	-1.02	99.00
JS_FE1714	0.58	0.34	0.39	-0.90	100.00

---

The fact sheet was created on 26.04.2024

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

Copyright © 2024 Geological Survey of Norway