Fact Sheet for <b>Occurence 1827

					Norsk versjon
	THE ORE DATABASE
	Occurence 1827 - 002 Risøya
	(Object Id: 2820) (Last updated: 25.02.2005)

Location

County:

Nordland

Municipality:

Dønna (1827)

Map 1:50000:

Sandnessjøen (1827-3)

Map 1:250000:

Mo i Rana

Coordinate system:

EU89-UTM Zone 33

East:

384983 m.

North:

7343648 m.

Longitude:

12.4460670

Latitude:

66.1919210

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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:	Pitting	Reserves:
	Operating method:		Historical production:

Products

Element/product Crude ore grade or quality Reg. date

Fe-total 44 % 28.10.1992

Operations

From - To Activity Comments

1887 - 1889 Pitting

1982 - 1982 Geology Company/Institution :Rana Gruber

Mineralization

Era: Proterozoic Period: Neoproterozoic

Genesis: Sedex Form: Lens

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

Main grain size: Coarse grained (> 3 mm) Main alteration:

Strike/Dip: 45 / 60 Direction: 245

Plunge: 20

Stratigraphic classification of host rock

Era: Proterozoic Period: Neoproterozoic

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation: Dunderland,Neverhaugen jernmalmformasjon

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Epidote Subordinate mineral (1-10%)

Gangue mineral Garnet 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

Unknown Eklogitt Intrusive
Original rock :Gabbro

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 :45 / 60 Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Rølvåg,Dønna jernmalmfelt: Risøya,øya øst for Risøya,Balhøla mt.-malm og mt.-hem.-malm. De viktigste malmsteder er: tykkelse lengde UTM-øst UTM-nord Risøya SV 1 m 60 m 384825 7343700 Risøya SØ 3 m 180 m 384950 7343700 Risøya SØ 3,5 m 240 m 385050 7343850 Risøya 2 liljevatn 1 m 120 m 385100 7343925 Risøya N 2 skutte røsk 2,5 m 140 m 385125 7344000 Risøya Ø 6 m 70 m 385250 7343975 Øya Ø for Risøya 2 m 70 m 385500 7343975 Øya Ø for Risøya 1 m 100 m 385700 7344025 Øya Ø for Risøya 2 m 40 m 385700 7344075 Balhøla 2 m 200 m 386250 7344100 Litl-langneset 0,3 m 120 m 387450 7344400 Malmlinse M.o.h. Gj.sn. Strøk- Malm Anslått Hem.magnetittm. mekti- lengde areal dybde l. str.orden tonn het m m m2 mal. m (spes.v. 3,9) Risøya SV 0-5 1,0 60 60 50 11 700 Risøya S 0-5 2,0 70 140 50 27 300 Risøya SØ 0-6 3,0 180 540 100 210 600 Risøya SØ 0-6 3,5 240 840 100 327 600 Risøya 2 liljev. 5 1,0 120 120 30 14 040 Risøya 2 sk.røsk 10 2,5 140 350 100 136 500 Risøya Ø 0-5 6,0 70 420 50 81 900 Risøya Ø 0-5 1,0 240 240 30 28 080 Øya Ø for Risøya 0-3 2,0 70 140 50 27 300 Øya Ø for Risøya 0-3 2,0 40 80 40 12 480 Øya Ø for Risøya 0-3 1,0 100 100 50 19 500 Balhøla 0-5 2,0 200 400 100 156 000 SUM RØLVÅG-FELTET 3430m2 1 053 000 tonn Disse 12 største malm-linser i Rølvåg-feltet som er 1m tykke eller tykkere har tilsammen en strøklengde på 1530m.Dividerer man summen av malmarealet med summen av strøklengden,får man gj.sn.tykkelse for de 12 største malmlinser=3430m2:1530m=2,24m Konklusjon Rølvåg-feltet: Malmtonnasjer 50m og 100m ned langs malmfallet i de 12 største malmlinser som i gj.sn. er 2,2m tykke er beregnet til 1 million tonn. Dersom man tar med 11 malmlinser med gj.sn. tykkelse 0,45m,øker malm- tonnasjen med bare 80 000 tonn. Malmlinsene ligger 0-5m,opptil 10m over havet. Malmlinsene opptrer langs en 1,6km lang strøklengde.Malmen er grovkornet magnetitt.De tykkeste malmlag inneholder grovkornet hematitt. Sammen med det 5km lenger NØ-for liggende Nordøy-feltet danner Rølvåg-feltet en domstruktur.Hele jernmalmformasjonen er vanlig 40-90m tykk, ved Risøy SV 150m. 19 prøver er analysert ved Norsk Jernverk 1976 og 1982 og viser: Utplukket ren magnetitt Prøve Fe tot. Fe magn. TiO2 MnO P S Øya NØ for Risøya 6B 69.5% 69.3% 0.10% 0.18% 0.07% 0.008% Magnetittmalm Øya NØ for Risøya 6A 46.1% 42.1% 0.10% 0.22% 0.20% 0.010% Øya NØ for Risøya 7 40.4% 36.4% 0.33% 2.00% 0.27% 0.013% Risøy SV odde 9 51.6% 46.0% 0.21% 0.31% 0.24% 0.023% Balhøla 20 37.4% 31.1% 0.13% 0.18% 0.28% 0.017% Balhøla 21 57.2% 55.5% 0.03% 0.09% 0.06% 0.007% 1.2km Ø for Balhøla 48.3% 46.1% 0.14% 0.62% 0.19% 0.007% Risøy 94A 44.1% 42.6% 0.19% 0.005% Risøy 94B 46.5% 45.5% 0.21% 0.005% Risøy 95 45.3% 42.5% 0.29% 0.005% Balhøgda 97A 48.6% 42.9% 0.34% 0.006% Balhøgda 97B 44.6% 39.2% 0.38% 0.014% Aritmetrisk middel: 46.3% 42.7% 0.16% 0.57% 0.24% 0.010% Magnetitt - Hematittmalm Risøya 4 42.7% 31.8% 0.13% 0.27% 0.12% 0.007% Risøya 12 52.6% 13.7% 0.15% 0.33% 0.24% 0.006% Balhøla 24A 39.5% 27.4% 0.23% 0.43% 0.59% 0.005% Balhøla 24B 58.4% 28.2% 0.21% 0.23% 0.19% 0.009% Balhøla 24C 47.9% 14.4% 0.05% 0.12% 1.38% 0.009% Aritm. middel: 46.3% 23.1% 0.15% 0.28% 0.50% 0.007% Hematitt - Magnetitt - Impregnasjon 1.5km ØNØ for Balhøla 17.6% 6.7% 0.87% 1.17% 0.10% 0.055% 2.3km ØNØ for Balhøla 12.4% 3.4% 3.40% 0.21% 0.12% 0.043% Aritm. middel: 15.0% 5.0% 2.14% 0.69% 0.11% 0.049% Risøya SØ Risøya SØ Øya Ø for Risøya Øya Ø for Risøya Øya Ø for Risøya Balhøla

Bibliography:

From NGU's Reference Archive:

Øvereng, Odd , 1990

Kalkstein - norsk mineralprodukt med vekstmuligheter.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;Årsmelding; No.1989;24-25 pages

Abstract:

Kalkstein er blant Norges viktigste mineralprodukter med en årlig produksjon på over 5 millioner tonn. De internasjonale markedsutsiktene gir rom for vekst. Særlig innen miljøteknologi (fjerning og nøytralisering av helsefarlige elementer) og til framstilling av spesielle papirkvaliteter, vil etterspørselen etter kalkstein øke. Utviklingen innen prosessteknologi gjør at forekomster som tidligere ikke ble vurdert som økonomisk interessante, i årene framover kan vise seg å bli lønnsomme.

Fieldsamples

Sample No. Sample type Miscellanrous

NO0710.03 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Finkornet massiv malm.

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: 4127 2,00,01)

Location

County: Nordland Municipality: Dønna (1827)

Map 1:50000: Sandnessjøen (1827-3) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 385133 m. North: 7343848 m.

Longitude: 12.4492120 Latitude: 66.1937680

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Resource

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

Element(s): Fe

Fieldsamples

Sample No. Sample type Miscellanrous

NO0710.01 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Grovkornet magnetittmalm med epidot og amfibol (chips).

No. of registrated element analyses = 1

NO0710.02 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Grovkornet magnetittmalm (chips).

No. of registrated element analyses = 1

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

Name of Sample point: Prøvepunkt 2

(Object Id: 4128 2,00,02)

Location

County: Nordland Municipality: Dønna (1827)

Map 1:50000: Sandnessjøen (1827-3) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 384783 m. North: 7343448 m.

Longitude: 12.4418120 Latitude: 66.1900540

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Resource

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

Element(s): Fe

Fieldsamples

Sample No. Sample type Miscellanrous

NO0710.04 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Båndet finkornet granat.

No. of registrated element analyses = 1

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

Name of Sample point: Prøvepunkt 3

(Object Id: 4129 2,00,03)

Location

County: Nordland Municipality: Dønna (1827)

Map 1:50000: Sandnessjøen (1827-3) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 384733 m. North: 7343498 m.

Longitude: 12.4406580 Latitude: 66.1904840

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Resource

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

Element(s): Fe

Fieldsamples

Sample No. Sample type Miscellanrous

NO0710.05 Bedrock

Sampler: Lindahl, I./...Stored: Løkken

Comment: Kisimpregnert gneis, sydvestre ende av Risøya.

No. of registrated element analyses = 1

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

Name of Locality: Rølvåg

(Object Id: 36455 2,01,00)

Location

County: Nordland Municipality: Dønna (1827)

Map 1:50000: Sandnessjøen (1827-3) Map 1:250000: Mo i Rana

Coordinate system: EU89-UTM Zone 33

East: 386131 m. North: 7343915 m.

Longitude: 12.4713060 Latitude: 66.1947310

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Resource

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

Element(s): Fe

Resources and production

Activity: Exploration Reserves:

Operating method: Historical production:

Information(s) in free text format

Free text

Rusty, skarn-type lenses and bands are enclosed in calcite marble north of Rølvåg close to the sea in the northwestern Above this zone is nearly flat-lying layers, up to 4 m thick, with semi-massive bands of magnetite in calcite marble (Samples JSFE15.20-21). Locally, coarse grained hematite occurs, and the matrix in these bands are pyroxene, quartz and minor amphibole. This iron formation is probably an eastward continuation of the IFs on the island Risøya.

Fieldsamples

Sample No. Sample type Miscellanrous

JSFE15.20 Bedrock

Comment: Massive magntite-hematite bands in quartz-pyroxene-amphibole matrix in calcite marble.

No. of registrated element analyses = 2

No. of registrated oxide analyses = 2

JSFE15.21 Bedrock

Comment: Massive magntite-hematite bands in quartz-pyroxene-amphibole matrix in calcite marble.

No. of registrated element analyses = 2

No. of registrated oxide analyses = 2

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

Analyse Results

from

Deposit Area 1827 - 002 Risøya

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#

JSFE15.20 Bedrock

JSFE15.20 Bedrock 5

JSFE15.21 Bedrock 2

JSFE15.21 Bedrock

NO0710.01 Bedrock 7 20 4 6 12 -.3 -2.0

NO0710.02 Bedrock 10 13 11 3 9 .4 -2.0

NO0710.03 Bedrock 12 7 8 5 8 -.3 -2.0

NO0710.04 Bedrock 48 28 3 8 25 -.3 -2.0

NO0710.05 Bedrock 58 64 13 17 42 .4 2.0

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

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

JSFE15.20 72 -5

JSFE15.20 64

JSFE15.21 167

JSFE15.21 208 -5

NO0710.01 3.0 -3.0 -5.0 -2 1.5 21 -1.00 -2

NO0710.02 -3.0 -3.0 -5.0 8 2.5 5 1.00 11

NO0710.03 -3.0 -3.0 -5.0 2 1.5 3 -1.00 7

NO0710.04 -3.0 -3.0 -5.0 10 .4 23 2.00 -2

NO0710.05 -3.0 -3.0 -5.0 -2 .3 53 6.00 -2

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

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

JSFE15.20 7.30 81 14 2.29 1.33

JSFE15.20 6.20 80 3.00 0.30

JSFE15.21 1.30 52 0.60 0.30

JSFE15.21 4.00 22 -10 0.23 0.17

NO0710.01 18 -.01 39 13 1437 24.01 2.00 -5.00

NO0710.02 33 -.01 32 12 1315 35.79 -2.00 -5.00

NO0710.03 26 -.01 29 11 1044 30.07 2.00 -5.00

NO0710.04 5 .15 25 16 6842 6.17 3.00 -5.00

NO0710.05 2 2.50 55 84 236 5.35 5.00 -5.00

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

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

JSFE15.20 1 12.5 205.3 28.8 79 -1.00 -0.10 0.29 15.00

JSFE15.20 -1 7.4 225.1 24.5 84 4.60 0.20 0.10 14.20

JSFE15.21 -1 2.5 366.7 21.1 21 1.50 0.10 -0.10 6.40

JSFE15.21 4 6.5 407.1 23.5 26 -1.00 -0.10 0.09 5.20

NO0710.01 -2 63.0 5.00

NO0710.02 -2 126.0 2.00

NO0710.03 14 96.0 6.00

NO0710.04 2 30.0 10.00

NO0710.05 -2 305.0 20.00

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

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

JSFE15.20 35.20 4.51 20.10 3.26 0.92 5.80 0.65 4.38 0.98

JSFE15.20 30.40 3.78 15.30 3.44 0.73 3.68 0.56 4.04 0.81

JSFE15.21 14.90 1.65 7.80 1.80 0.46 2.16 0.36 2.49 0.68

JSFE15.21 14.90 1.90 8.30 2.02 0.52 3.13 0.35 2.88 0.61

NO0710.01

NO0710.02

NO0710.03

NO0710.04

NO0710.05

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

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

JSFE15.20 2.89 0.42 2.77 0.50 2.60

JSFE15.20 2.49 0.35 2.48 0.41 1 1.90

JSFE15.21 1.86 0.28 2.03 0.35 -1 0.40

JSFE15.21 2.08 0.29 2.38 0.33 0.80

NO0710.01 -3

NO0710.02 -3

NO0710.03 -3

NO0710.04 -3

NO0710.05 -3

Oxide analyses
( All values are in % )

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

JSFE15.20 Bedrock 30.80 3.12 0.32 56.00 0.23 3.30 6.28

JSFE15.20 Bedrock 25.35 2.57 0.33 61.06 0.21 2.74 5.67

JSFE15.21 Bedrock 15.40 0.90 0.10 81.30 0.16 0.39 2.89

JSFE15.21 Bedrock 14.82 0.87 0.08 79.56 0.14 0.28 3.14

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

Sample No. Na2O K2O P2O5 Loss Sum

JSFE15.20 1.09 0.20 0.42 -1.58 100.00

JSFE15.20 0.90 0.20 0.57 -1.57 98.00

JSFE15.21 0.10 0.11 0.58 -1.72 100.00

JSFE15.21 0.14 0.13 0.62 -1.81 98.00

	Element/product	Crude ore grade or quality	Reg. date
	Fe-total	44 %	28.10.1992

From - To	Activity	Comments
1887 - 1889	Pitting
1982 - 1982	Geology	Company/Institution :Rana Gruber

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

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Epidote	Subordinate mineral (1-10%)
Gangue mineral	Garnet	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
Unknown	Eklogitt	Intrusive Original rock :Gabbro
		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 :45 / 60	Syn-mineralisation ;...Effect :None

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JSFE15.20	Bedrock
JSFE15.20	Bedrock				5
JSFE15.21	Bedrock				2
JSFE15.21	Bedrock
NO0710.01	Bedrock	7	20	4	6	12	-.3	-2.0
NO0710.02	Bedrock	10	13	11	3	9	.4	-2.0
NO0710.03	Bedrock	12	7	8	5	8	-.3	-2.0
NO0710.04	Bedrock	48	28	3	8	25	-.3	-2.0
NO0710.05	Bedrock	58	64	13	17	42	.4	2.0

Sample No.	Bi*	Ga*	S%	V*	Cr*	Mn*	Fe%	Th*	U*
JSFE15.20		7.30		81	14			2.29	1.33
JSFE15.20		6.20		80				3.00	0.30
JSFE15.21		1.30		52				0.60	0.30
JSFE15.21		4.00		22	-10			0.23	0.17
NO0710.01	18		-.01	39	13	1437	24.01	2.00	-5.00
NO0710.02	33		-.01	32	12	1315	35.79	-2.00	-5.00
NO0710.03	26		-.01	29	11	1044	30.07	2.00	-5.00
NO0710.04	5		.15	25	16	6842	6.17	3.00	-5.00
NO0710.05	2		2.50	55	84	236	5.35	5.00	-5.00

Sample No.	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*	La*
JSFE15.20	1	12.5	205.3	28.8	79	-1.00	-0.10	0.29	15.00
JSFE15.20	-1	7.4	225.1	24.5	84	4.60	0.20	0.10	14.20
JSFE15.21	-1	2.5	366.7	21.1	21	1.50	0.10	-0.10	6.40
JSFE15.21	4	6.5	407.1	23.5	26	-1.00	-0.10	0.09	5.20
NO0710.01	-2		63.0						5.00
NO0710.02	-2		126.0						2.00
NO0710.03	14		96.0						6.00
NO0710.04	2		30.0						10.00
NO0710.05	-2		305.0						20.00

Sample No.	Ce*	Pr*	Nd*	Sm*	Eu*	Gd*	Tb*	Dy*	Ho*
JSFE15.20	35.20	4.51	20.10	3.26	0.92	5.80	0.65	4.38	0.98
JSFE15.20	30.40	3.78	15.30	3.44	0.73	3.68	0.56	4.04	0.81
JSFE15.21	14.90	1.65	7.80	1.80	0.46	2.16	0.36	2.49	0.68
JSFE15.21	14.90	1.90	8.30	2.02	0.52	3.13	0.35	2.88	0.61
NO0710.01
NO0710.02
NO0710.03
NO0710.04
NO0710.05

Sample No.	Er*	Tm*	Yb*	Lu*	B*	Be*	Hf*
JSFE15.20	2.89	0.42	2.77	0.50			2.60
JSFE15.20	2.49	0.35	2.48	0.41		1	1.90
JSFE15.21	1.86	0.28	2.03	0.35		-1	0.40
JSFE15.21	2.08	0.29	2.38	0.33			0.80
NO0710.01					-3
NO0710.02					-3
NO0710.03					-3
NO0710.04					-3
NO0710.05					-3

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JSFE15.20	Bedrock	30.80	3.12	0.32	56.00	0.23	3.30	6.28
JSFE15.20	Bedrock	25.35	2.57	0.33	61.06	0.21	2.74	5.67
JSFE15.21	Bedrock	15.40	0.90	0.10	81.30	0.16	0.39	2.89
JSFE15.21	Bedrock	14.82	0.87	0.08	79.56	0.14	0.28	3.14

Sample No.	Na2O	K2O	P2O5	Loss	Sum
JSFE15.20	1.09	0.20	0.42	-1.58	100.00
JSFE15.20	0.90	0.20	0.57	-1.57	98.00
JSFE15.21	0.10	0.11	0.58	-1.72	100.00
JSFE15.21	0.14	0.13	0.62	-1.81	98.00