Faktarka for Forekomstområde 819

					English version
	MALMDATABASEN
	Forekomstområde 819 - 011
	(Sist oppdatert 20.mar.2024)

Navn på forekomstområde : Søve

(Objekt Id : 0819,011,00,00)

Lokalisering

Fylke :

Telemark (08)

Kommune :

Nome (0819)

Kart 1:50000:

Nordagutu (1713-4)

Kart 1:250000:

Skien

Markeringspunkt:

Lengdegrad:

9.2849090

Breddegrad:

59.2819480

EU89-UTM Zone 32

X-koord:

516234 m.

Y-koord:

6571482 m.

Materialtype

	Hovedtype:	Spesialmetaller (Nb,Ta,Be,Li,Sc,REE)	Subtype:	Niob
			Element(er):	Nb Ta REE

Produksjon

Aktivitet:	Gruvedrift	Reserver:
Prod. metode:	Dag- og underjordsdrift	Produksjon:	1150 tusen tonn
Prod. status:	Nedlagt	Tippvolum:

Betydning

Offentlig: Ikke vurdert (reg. 22.05.2015)

Økonomisk: Kan være viktig , (Stadfestet 07.des.2001 av Jan Sverre Sandstad)

Produkt

Element/produkt Gehalt/Kvalitet

NB 2800 ppm

Operasjoner

Fra - Til Aktivitet Kommentar

1951 - 1965 Regulær drift Selskap/Institusjon:Norsk Bergverk AS

Mineralisering

Æra: Paleozoikum Periode: Kambrium

Datering: Metode:

Genese: Intrusivbreksje/diatrem Form:

Hovedtextur: Strukturløs Min. fordeling: Disseminert

Kornstørrelse: Finkornet (<1 mm) Hovedomvandling: Kalifeltspatomvandling

Strøk/Fall: Retning:

Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

Æra: Periode:

Provins:

Geotek.enhet:

Tektonisk complex:

Intrusivt komplex:

Gruppe: Formasjon:

Mineralogi

Relasjon Mineral Mengde

Gangmineral Kalkspat Hovedmineral (>10%)

Gangmineral Glimmer Underordnet mineral (1-10%)

Gangmineral Apatitt Underordnet mineral (1-10%)

Malmmineral Pyroklor Hovedmineral (>10%)

Malmmineral Synchysitt Aksessorisk mineral (<1%)

Malmmineral Bastnäsitt Aksessorisk mineral (<1%)

Malmmineral Monazitt Aksessorisk mineral (<1%)

Malmmineral Parisitt Aksessorisk mineral (<1%)

Opplysning(er) i fritekstformat

Fri tekst

Fen is an early Cambrian silicate-carbonatite composite complex, which has a diameter of 5 km. It consists of a number of different intrusive to subvolcanic lithologies, including calcio- and ferrocarbonatites and various alkaline silicate rocks. The ferrocarbonatites are rich in ankerite and dolomite and contain Nb-, REE- and Th-rich minerals. In the eastern part of the complex, a red-colored carbonate- and oxide-rich rock unit occurs that is termed "rødbergite" (red rock). The red color is caused by finely dispersed hematite. Locally, the hematite is concentrated in dykes and veins and 1 mill t. of hematite ore was exploited by the Fen iron mines between 1657 until 1929. The rødberg rocks are rich in thorium and REE and resources are estimated to contain 170 000 t with 0.2 % Th and about 1 % REE (LREE). The calciocarbonatites (søvites) contain calcite, pyrochlore, biotite, REE-F-carbonates and monazite and the state-owned company AS Norsk Bergverk produced 1.15 mill t. of Nb-ore between 1953-1965 in the Søve mines, which gave 4100 t of Nb2O5. The pyrochlore is mainly concentrated along the margin of the carbonatite, but also related to breccia zones crosscutting the central part of the intrusion.

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Bergstøl, Sveinung; Svinndal, Sverre , 1960

Description of mines and deposits. Søve Niobium Mine, Fen area.

;Norges geologiske undersøkelse;EKSKURSJONSGUIDE; TIDSSKRIFTARTIKKEL;NGU; No.212m;16-26 sider

Bergstøl, Sveinung; Svinndal, Sverre , 1960

The carbonite and per-alkaline rocks of the Fen area. Petrology.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.208;99-105 sider

Sæther, Egil , 1957

The alkaline rock province of the Fen area in southern Norway.

;ARTIKKEL;Det Kongelige Norske Videnskabers Selskabs Skrifter; No.1;150 s. sider

Abstrakt:

An account is given of the field relationships, petrography, and mode of formation of alkaline silicate and carbonate rocks in the Cambro-Silurian Fen area in Telemarken, southwestern Norway. The Fen complex lies in Archean gneiss and gneissose granite and consists of the following rocks: granitic breccia; fenite (syenite); vipetoite, melteigite, ijolite, urtite (mafic alkalic rocks); damtjernite (hypabyssal rock); soevite (calcite rock); rauhaugite (ankerite rock); roedbergite or red rock (clacite-ankerite-hematite rock); and some dike rocks. Chemical rock and mineral analyses and spectrochemical analyses of oxide and sulfide minerals are presented, and optical data are given for many minerals. Substance transfers are computed for various metasomatic rock transformations in the area. Petrofabric diagrams of carbonatites are presented and interpreted. Genesis of the rocks is ascribed to two magmas poor in silica and rich in alkali metals, calcium, and carbon dioxide. Two separate cycles are established, each of which involved eruption of a mafic magma with subsequent very extensive hydrothermal activity (alkali metasomatism and carbonatization). The Fen area is compared with Alnø in Sweden, its close counterpart.

Lie, Anders; Østergaard, Claus , 2011

The Fen carbonatite complex, Ulefoss, South Norway. Results and conclusions from preliminary microscope and microprobe studies

;21st NORTH;RAPPORT;35 sider

Lie, Anders; Østergaard, Claus , 2011

The Fen carbonatite complex, Ulefoss, South Norway. Summary of historic work and data

;21st NORTH;RAPPORT;47 sider

Andersen, Tom , 1983

Iron ores in the Fen central complex, Telemark (S.Norway): Petrography, chemical evolution and conditions of equilibrium

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.63 (2/3);73-82 sider

Abstrakt:

Hydrothermal iron ores from the Fen central complex may be classified according to their mineral assemblages as primary (magnetite +- pyrite +- anatase + calcite) or secondary (hematite +- goethite + calcite +- dolomite). Primary ores equilibrated between the hematite-magnetite and magnetite-pyrite-pyrrho- tite buffers, at temperatures below 600°C. Alteration to form the secondary parageneses took place above the hematite-magnetite buffer, probably at lower temperature.

Feltprøver

Prøvenr. Prøvetype Diverse

95394 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95395 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95397 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95398 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95399 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95400 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95401 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95402 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95403 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

95404 Fastfjell

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

NB! Alle analyseverdier er vist i slutten av utskriften.:

Analyseresultater

fra

Forekomstområde 819 - 011 Søve

Elementanalyser
( *=parts pr. million, #=parts pr.billion, Negative verdier betyr under deteksjonsgrensen.)

Prøvenr. Prøvetype Co* Ni* Ba* Sn* Ga* V* Cr*

95394 Fastfjell 10 730 1 4.40 133 21

95395 Fastfjell 11 17301 7 8.40 89 103

95397 Fastfjell 29 53 212 5 11.80 151 123

95398 Fastfjell 16 2073 1 10.40 134 116

95399 Fastfjell 14 581 2 1.80 121

95400 Fastfjell 4 62 0.50 11

95401 Fastfjell 8 916 0.60 83

95402 Fastfjell 7 6941 6.90 77

95403 Fastfjell 13 642 1.60 18 21

95404 Fastfjell 5 83 2 2.80 28 41

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

Prøvenr. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*

95394 17.80 1.30 3.0 3920.7 58.3 259 59.50 6.90

95395 782.30 3.70 5 3.2 1885.1 116.8 116 706.30 12.40

95397 1080.10 22.90 12 1.0 304.0 366.5 177 840.80 3.70

95398 1470.60 3.40 11 0.5 140.2 263.6 175 667.80 0.40

95399 19.30 0.90 1.0 3789.7 69.3 74 46.00 4.60

95400 63.70 0.80 1 0.3 3800.9 24.8 50 2735.90 10.70

95401 28.60 113.60 6.0 4523.4 66.3 17 328.60 81.30

95402 67.00 104.80 1 27.8 2938.1 138.9 365 421.50 58.30

95403 98.20 18.70 1 1.3 5147.8 83.6 64 821.50 6.00

95404 106.80 5.70 1 0.5 430.8 46.1 13 302.90 3.10

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

Prøvenr. Cs* La* Ce* Pr* Nd* Sm* Eu* Gd* Tb*

95394 0.30 269.50 527.20 60.24 218.50 32.87 9.36 24.83 2.68

95395 0.80 1516.20 2906.30 338.52 1269.70 237.85 64.87 137.05 11.00

95397 432.40 1066.50 163.27 808.70 231.68 54.55 148.03 15.09

95398 0.10 1897.60 6680.90 1111.09 5046.40 546.73 94.51 163.71 10.31

95399 262.60 544.40 67.23 256.60 40.83 11.77 31.02 3.41

95400 137.80 313.40 38.75 140.50 21.92 5.92 14.93 1.50

95401 0.20 228.80 500.00 61.95 239.00 38.52 11.10 28.68 3.27

95402 0.20 541.90 1163.50 145.48 537.10 82.08 22.62 59.80 6.87

95403 0.30 1066.70 1778.80 209.41 813.20 139.91 31.32 62.38 4.51

95404 3289.60 4894.60 448.13 1334.30 116.53 14.30 56.96 3.49

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

Prøvenr. Dy* Ho* Er* Tm* Yb* Lu* Be* Hf*

95394 12.82 1.93 4.89 0.61 3.70 0.50 1 2.00

95395 40.77 4.15 9.04 1.41 9.63 1.23 2 3.10

95397 70.77 11.10 27.45 3.90 23.59 3.27 24 9.40

95398 44.92 5.62 15.73 2.22 13.43 1.79 9 2.30

95399 15.96 2.35 5.44 0.65 3.59 0.46 0.50

95400 6.40 0.96 2.14 0.25 1.28 0.15 0.90

95401 16.29 2.23 5.30 0.66 4.25 0.47 0.50

95402 32.95 5.00 12.00 1.47 8.21 1.06 3.50

95403 18.87 2.20 5.72 0.88 5.89 0.81 0.90

95404 12.41 0.99 2.13 0.32 2.28 0.26

Oksydanalyser
(Alle verdier er i %)

Prøvenr. Prøvetype SiO2 Al2O3 TiO2 Fe2O3 MnO MgO Na2O

95394 Fastfjell 2.08 0.32 0.18 6.30 0.22 2.80 0.13

95395 Fastfjell 5.02 1.67 0.71 16.49 1.83 10.36 0.11

95397 Fastfjell 18.35 4.01 0.54 15.16 0.34 2.60 0.05

95398 Fastfjell 2.05 0.71 0.07 90.39 0.54 0.54

95399 Fastfjell 0.65 0.27 0.17 5.61 0.18 2.03 0.03

95400 Fastfjell 0.75 0.02 3.42 0.60 17.06 0.01

95401 Fastfjell 1.39 0.52 0.25 4.10 0.23 2.96 0.03

95402 Fastfjell 9.73 2.47 0.56 5.58 0.35 6.09 0.08

95403 Fastfjell 0.98 0.38 0.02 8.40 0.73 7.49 0.03

95404 Fastfjell 1.47 0.58 0.01 1.98 0.32 0.84

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

Prøvenr. K2O P2O5 Loss Sum

95394 0.06 4.26 35.00 51.00

95395 0.07 0.24 35.70 72.00

95397 0.01 0.63 24.70 66.00

95398 0.02 0.67 0.30 95.00

95399 0.03 3.35 37.20 50.00

95400 4.16 40.70 67.00

95401 0.20 3.67 37.80 51.00

95402 1.52 15.70 19.80 62.00

95403 0.04 11.26 27.60 57.00

95404 0.35 40.90 46.00

	Fra - Til	Aktivitet	Kommentar
	1951 - 1965	Regulær drift	Selskap/Institusjon:Norsk Bergverk AS

Æra:	Paleozoikum	Periode:	Kambrium
Datering:		Metode:
Genese:	Intrusivbreksje/diatrem	Form:
Hovedtextur:	Strukturløs	Min. fordeling:	Disseminert

	Provins:
	Geotek.enhet:
	Tektonisk complex:
	Intrusivt komplex:

Relasjon	Mineral	Mengde
Gangmineral	Kalkspat	Hovedmineral (>10%)
Gangmineral	Glimmer	Underordnet mineral (1-10%)
Gangmineral	Apatitt	Underordnet mineral (1-10%)
Malmmineral	Pyroklor	Hovedmineral (>10%)
Malmmineral	Synchysitt	Aksessorisk mineral (<1%)
Malmmineral	Bastnäsitt	Aksessorisk mineral (<1%)
Malmmineral	Monazitt	Aksessorisk mineral (<1%)
Malmmineral	Parisitt	Aksessorisk mineral (<1%)

Prøvenr.	Prøvetype	Co*	Ni*	Ba*	Sn*	Ga*	V*	Cr*
95394	Fastfjell	10		730	1	4.40	133	21
95395	Fastfjell	11		17301	7	8.40	89	103
95397	Fastfjell	29	53	212	5	11.80	151	123
95398	Fastfjell	16		2073	1	10.40	134	116
95399	Fastfjell	14		581	2	1.80	121
95400	Fastfjell	4		62		0.50	11
95401	Fastfjell	8		916		0.60	83
95402	Fastfjell	7		6941		6.90	77
95403	Fastfjell	13		642		1.60	18	21
95404	Fastfjell	5		83	2	2.80	28	41

Prøvenr.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
95394	17.80	1.30		3.0	3920.7	58.3	259	59.50	6.90
95395	782.30	3.70	5	3.2	1885.1	116.8	116	706.30	12.40
95397	1080.10	22.90	12	1.0	304.0	366.5	177	840.80	3.70
95398	1470.60	3.40	11	0.5	140.2	263.6	175	667.80	0.40
95399	19.30	0.90		1.0	3789.7	69.3	74	46.00	4.60
95400	63.70	0.80	1	0.3	3800.9	24.8	50	2735.90	10.70
95401	28.60	113.60		6.0	4523.4	66.3	17	328.60	81.30
95402	67.00	104.80	1	27.8	2938.1	138.9	365	421.50	58.30
95403	98.20	18.70	1	1.3	5147.8	83.6	64	821.50	6.00
95404	106.80	5.70	1	0.5	430.8	46.1	13	302.90	3.10

Prøvenr.	Cs*	La*	Ce*	Pr*	Nd*	Sm*	Eu*	Gd*	Tb*
95394	0.30	269.50	527.20	60.24	218.50	32.87	9.36	24.83	2.68
95395	0.80	1516.20	2906.30	338.52	1269.70	237.85	64.87	137.05	11.00
95397		432.40	1066.50	163.27	808.70	231.68	54.55	148.03	15.09
95398	0.10	1897.60	6680.90	1111.09	5046.40	546.73	94.51	163.71	10.31
95399		262.60	544.40	67.23	256.60	40.83	11.77	31.02	3.41
95400		137.80	313.40	38.75	140.50	21.92	5.92	14.93	1.50
95401	0.20	228.80	500.00	61.95	239.00	38.52	11.10	28.68	3.27
95402	0.20	541.90	1163.50	145.48	537.10	82.08	22.62	59.80	6.87
95403	0.30	1066.70	1778.80	209.41	813.20	139.91	31.32	62.38	4.51
95404		3289.60	4894.60	448.13	1334.30	116.53	14.30	56.96	3.49

Prøvenr.	Dy*	Ho*	Er*	Tm*	Yb*	Lu*	Be*	Hf*
95394	12.82	1.93	4.89	0.61	3.70	0.50	1	2.00
95395	40.77	4.15	9.04	1.41	9.63	1.23	2	3.10
95397	70.77	11.10	27.45	3.90	23.59	3.27	24	9.40
95398	44.92	5.62	15.73	2.22	13.43	1.79	9	2.30
95399	15.96	2.35	5.44	0.65	3.59	0.46		0.50
95400	6.40	0.96	2.14	0.25	1.28	0.15		0.90
95401	16.29	2.23	5.30	0.66	4.25	0.47		0.50
95402	32.95	5.00	12.00	1.47	8.21	1.06		3.50
95403	18.87	2.20	5.72	0.88	5.89	0.81		0.90
95404	12.41	0.99	2.13	0.32	2.28	0.26

Prøvenr.	Prøvetype	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	Na2O
95394	Fastfjell	2.08	0.32	0.18	6.30	0.22	2.80	0.13
95395	Fastfjell	5.02	1.67	0.71	16.49	1.83	10.36	0.11
95397	Fastfjell	18.35	4.01	0.54	15.16	0.34	2.60	0.05
95398	Fastfjell	2.05	0.71	0.07	90.39	0.54	0.54
95399	Fastfjell	0.65	0.27	0.17	5.61	0.18	2.03	0.03
95400	Fastfjell	0.75		0.02	3.42	0.60	17.06	0.01
95401	Fastfjell	1.39	0.52	0.25	4.10	0.23	2.96	0.03
95402	Fastfjell	9.73	2.47	0.56	5.58	0.35	6.09	0.08
95403	Fastfjell	0.98	0.38	0.02	8.40	0.73	7.49	0.03
95404	Fastfjell	1.47	0.58	0.01	1.98	0.32	0.84

Prøvenr.	K2O	P2O5	Loss	Sum
95394	0.06	4.26	35.00	51.00
95395	0.07	0.24	35.70	72.00
95397	0.01	0.63	24.70	66.00
95398	0.02	0.67	0.30	95.00
95399	0.03	3.35	37.20	50.00
95400		4.16	40.70	67.00
95401	0.20	3.67	37.80	51.00
95402	1.52	15.70	19.80	62.00
95403	0.04	11.26	27.60	57.00
95404		0.35	40.90	46.00