Norsk versjon
	THE ORE DATABASE
	Occurence 1841 - 026 Furuhaugen
	(Object Id: 2642) (Last updated: 01.06.2015)

Products

	Element/product	Crude ore grade or quality	Reg. date
	Cu	1.65 %	28.05.1993
	Kis	17.5 %	28.05.1993

Operations

	From - To	Activity	Comments
	1876 - 1985	Geology	Company/Institution :Sulitjelma Gruber
	1890 - 1980	Core drilling	Company/Institution : " "
	1896 - 1918	Regular production	Company/Institution : " "
	1938 - 1981	Geophysics	Company/Institution : " "

Mineralization

	Era:	Paleozoic	Period:	Ordovician
	Genesis:	Volcex	Form:	Layer
	Main texture:	Breccia cement	Min. distribution:	Semi-massive (20-50 % ore minerals)

Main grain size:

Very unevenly grained

Main alteration:

Chloritisation

	Strike/Dip:	135 / 25	Direction:	270
			Plunge:	20

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

	Province:	Caledonides
	Geotec.unit:	Seve-Køli Nappe Complex
	Tectonic complex:	Kølidekkekomplekset
	Igneous complex:

Group:

Sulitjelmagruppen

Formation:

Otervassformasjonen

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Chlorite	Major mineral (>10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Amfibolitt	Extrusive Original rock :Tuff
			Metamorphic facies :Amphibolite
	Wall rock	Glimmerskifer	Sedimentary Original rock :Sandstone
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Fold axis	Strike/Dip :270 / 25	Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Description

The Sulitjelma Area includes more than 20 deposits with a total tonnage in excess of 35 Mt (Cook et al. 1990). The average grades of the 25 Mt mined from 11 deposits between 1887 and 1991 were 1.84 % Cu and 0.86 % Zn. Contents of precious metals were 10 g/t Ag and 0.25 g/t Au (Cook et al. 1990). The deposits are concentrated in an area of 25 km2, and are located at varying stratigraphic-structural levels in the Otervann Volcanic Formation (Cook et al., 1990), also known as the Sulitjelma amphibolites, in the Upper Allochthon Køli Nappe Complex. The palaeotectonic setting of the volcanic rocks is disputed. According to Boyle (1989), the volcanic rocks form the extrusive part of the Sulitjelma ophiolite complex, underlain by sheeted dikes of the Mietjerpakte Intrusive Complex and below that the Sulitjelma Gabbro Complex. Inclusions of Precambrian gneiss in the Gabbro have been interpreted to show that the ophiolite complex represents a fragment of an ensialic marginal basin (Cook et al. 1990). The gabbro has been dated to 437 ± 2 Ma (Pedersen et al. 1991), and because of the cogenetic relationships between the young gabbro and the volcanic rocks, it has been argued that the term ophiolite complex is inappropriate (Grenne et al. 1999). Structurally below the volcanic rocks, there is a thick sedimentary sequence of schists, the Furulund Group, which contains fossils of Upper Ordovician to Lower Silurian age (Spjeldnæs 1985). The whole rock package has been folded isoclinally, leading to a large-scale repetition of sedimentary and volcanic units. This also means that the ore units are repeated (Cook et al. 1990). The volcanic pile is divided into several units, and the sulphide deposits are found at different levels within these units. The deposits are further divided into a Southern and a Northern Ore Field. The Jakobsbakken, Sagmo and Anna deposits are in the southern part of the ore field. The Jakobsbakken deposit is the most zinc-rich of the deposits, containing 4.5 Mt of ore with 1.55 % Cu and 2.42 % Zn. It also is at a structurally lower position than the other two main deposits in the Southern Ore Field, closer to the underlying Furulund Schist. Most of the deposits are in the Northern Ore Field. The Ny-Sulitjelma and Bursi deposits are the structurally the lowest in this ore field, and are situated between overlying metabasalts of the so-called Giken Amphibolite Unit and the Furulund Schist (Cook et al. 1990). Structurally higher up in the Giken Amphibolite Unit is the Hankabakken–Palmberg ore zone. The largest of the deposits in the Sulitjelma field, Giken, is situated structurally above the Giken Amphibolite Unit and below a schist unit (the Leirelva Schist) equivalent to the Furulund Schist. The Giken deposit contained 10.5 Mt of ore, of which 5.8 Mt was mined, containing 2.25 % Cu and 0.7 % Zn. Further up structurally is the Charlotta deposit, which is located at the contact between the Leirelva Schist and the Lower Amphibolite Unit. It is possible that this is the same level as the Sagmo deposit in the Southern Ore Field. The Mons Petter deposit is the structurally highest ore zone in the Northern Ore Field, and is situated between the Lower and Middle Amphibolite Unit. The westernmost, small Furuhaugen deposit (0.52 Mt) has an uncertain structural position, but is possibly the highest deposit in the stratigraphy. Polyphase deformation with a high degree of folding and amphibolite-grade metamorphism has obliterated most primary textures and mineralogical zonation patterns in the Sulitjelma Ore Field. However, several of the deposits are underlain by alteration zones, and display zonation in base metals in accordance with classical VMS type deposits (Cook et al. 1990). References Boyle, A.P. 1989: The geochemistry of the Sulitjelma ophiolite and associated basic volcanics: Tectonic implications. in Gayer, R.A. (ed.): The Caledonide geology of Scandinavia, London, Graham and Trottman, p. 153–163. Cook, N.J., Halls, C. & Kaspersen, P. 1990: The geology of the Sulitjelma ore field, Northern Norway – some new interpretations. Economic Geology, vol. 85, 1720–1737. Grenne, T., Ihlen, P. M. & Vokes, F. M. 1999: Scandinavian Caledonide metallogeny in a plate tectonic perspective. Mineralium Deposita, v. 34, p. 422–471. Pedersen, R.B., Furnes, H. & Dunning, G. 1991: A U/Pb age for the Sulitjelma Gabbro, north Norway: Further evidence for the development of a Caledonian marginal basin in Ashgill–Llandovery time. Geological Magazine, vol. 128, p. 141–153. Spjeldnæs, N. 1985: Biostratigraphy of the Scandinavian Caledonides. In Gee, D.G. and Sturt, B.A. (eds.): The Caledonide orogen – Scandinavia and related areas. Wiley, Chichester, p.317–329.

Photo(s) from the Deposit area:

Photo no. 1 showing Furuhaugen gruveområde midt i bildet"

Bibliography:

From NGU's Reference Archive:

Boyle, A.P.; Hansen, T.S.; Mason, R.; , 1985

	A new tectonic perspective of the Sulitjelma Region. I The Caledonide Orogen - Scandinavia and Related Areas, Red: D.G. Gee & B.A. Sturt

;John Wiley & Sons Ltd;ARTIKKEL;531-542 pages

Cook, N. , 1996

	Mineralogy of the sulphide deposits at Sulitjelma, northern Norway

;ARTIKKEL;Ore geology reviews; No.11;303-338 pages

Findlay, Robert H. , 1980

	A regional lithostratigraphy for southern and eastern Sulitjelma, north Norway.

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.60 (4);223-234 pages

	Abstract:
	A revised regional lithostratigraphy is described for the Sulitjelma region. Tectonic boundaries occur at two levels in the lithostratigraphic column: these tectonic boundaries correlate with the soles of the Gasak and Pieske Nappes.

Søyland-Hansen, T. , 1976

	Sulitjelma grube. Oversiktskart 1:50 000

;Norges geologiske undersøkelse;KART;Bergarkivet; No.K 2082

Singsaas, Per; Sakshaug, G. F. , 1968

	Elektromagnetisk undersøkelse Avilonstollen, Sulitjelma.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.805;5 pages

Kollung, S. , 1986

	Sulitjelma. Berggrunnskart; Sulitjelma; 21292; 1:50 000; trykt i farger;

;Norges geologiske undersøkelse;KART

	Abstract:
	Opptrykk 1989

Kollung, Sigbjørn , 1989

	Sulitjelmafeltet. Berggrunnsgeologisk kart - M 1 : 100 000. Beskrivelse.

;Norges geologiske undersøkelse;BOK; KARTBESKRIVELSE;Skrifter; No.93;1 - 47 pages

Abstract:

The eugeoclinal rocks of the Sulitjelma region occup a large depression in the Norwegian Caldonodrd betwwen the Nasafjell tectonic window of Precambrian rocks in the south and the Tysfjord window in the north. The age of the rocks is thought to be Cambro-Silurian. The regionl metamophism is mainly in greenschist facies in the lower units, amphibolite facies in the Gasak Nappe and greenschist to amphibolite facies in the Fauske Nappe. Some of the largest sulphide deposits in Norway are located near Sulitjelma. The different types of mineralizations occurring in the region are briefly described.

Krog, Jan Reidar; Næss, Gunnar , 1987

	Geokjemiske undersøkelser av bekkesedimenter i Sulitjelma-området.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.86.047;59 pages

	Abstract:
	Bekkesedimenter fra 334 prøvelokaliteter i Sulitjelma-området ble innsamlet med en prøvetetthet på 1 prøve pr. 10 km2. Rapporten inneholder tabeller og resultkart over 28 elementer oppsluttet med HNO3 og bestemt med ICAP.

Hofseth, Arne , 1934

	Malmgeologsk og malmpetrografisk beskrivelse av Furuhaugen grubefelt ved Sulitjelma.

;NTH Bergavd.;AVHANDLING

Singsaas, Per; Brækken, H. , 1942

	Elektromagnetiske undersøkelser Furuhaugen Grube - Gjertrudfjell, Bursi Grube - Furulund, Furulundskjerp - Lapphelleren, Fjell grube, Hankabakken grube, Storhaugen skjerp

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.26;23 pages

Name of Sample point: Prøvepunkt 1

(Object Id: 4075 26,00,01)

Location

County:

Nordland

Municipality:

Fauske (1841)

Map 1:50000:

Sulitjelma (2129-2)

Map 1:250000:

Sulitjelma

Coordinate system:

EU89-UTM Zone 33

East:

541380 m.

North:

7448562 m.

Longitude:

15.9550010

Latitude:

67.1512850

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Copper
			Element(s):	Cu Kis

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0515.01	Dump	Sampler: Furuhaug, L./...Stored: Løkken Comment: Grovk. py med cpy. ~ 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 2

(Object Id: 4076 26,00,02)

Location

County:

Nordland

Municipality:

Fauske (1841)

Map 1:50000:

Sulitjelma (2129-2)

Map 1:250000:

Sulitjelma

Coordinate system:

EU89-UTM Zone 33

East:

541580 m.

North:

7449049 m.

Longitude:

15.9597870

Latitude:

67.1556260

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Copper
			Element(s):	Cu Kis

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0515.03	Dump	Sampler: Furuhaug, L./...Stored: Løkken Comment: Diss. py med cpy og sl i q-ser.sk. 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: 4077 26,00,03)

Location

County:

Nordland

Municipality:

Fauske (1841)

Map 1:50000:

Sulitjelma (2129-2)

Map 1:250000:

Sulitjelma

Coordinate system:

EU89-UTM Zone 33

East:

541398 m.

North:

7448693 m.

Longitude:

15.9554790

Latitude:

67.1524530

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Copper
			Element(s):	Cu Kis

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NO0515.02	Dump	Sampler: Furuhaug, L./...Stored: Løkken Comment: Diss. py med cpy og sl i q-ser.sk. No. of registrated element analyses = 1

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

---

Analyse Results

from

Deposit Area 1841 - 026 Furuhaugen

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#
NO0515.01	Dump	8140	11651	64	525	113	8.3	129.0
NO0515.02	Dump	4263	975	27	59	20	3.2	275.0
NO0515.03	Dump	7699	5070	41	604	77	8.1	80.0

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

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
NO0515.01	-3.0	-3.0	-5.0	106	28.1	5	4.00	-2	-2
NO0515.02	-3.0	-3.0	-5.0	22	3.4	24	6.00	-2	5
NO0515.03	-3.0	3.0	-5.0	67	15.8	5	6.00	-2	34

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

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
NO0515.01	34.51	2	14	15	41.40	-2.00	-5.00	5	1.0
NO0515.02	5.61	41	84	302	8.44	-2.00	-5.00	-2	4.0
NO0515.03	30.86	20	29	160	37.09	2.00	-5.00	2	1.0

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

Sample No.	La*	B*
NO0515.01	1.00	4
NO0515.02	2.00	-3
NO0515.03	2.00	6

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The fact sheet was created on 19.04.2024

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