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	MALMDATABASEN
	Forekomstområde 1850 - 028
	(Sist oppdatert 23.okt.2024)

Betydning

Offentlig:

(Ingen data)

Økonomisk:

Lite viktig , (Stadfestet 22.okt.2024 av Havard Gautneb)

Mineralisering

	Æra:		Periode:
	Datering:		Metode:
	Genese:		Form:
	Hovedtextur:		Min. fordeling:

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	Strøk/Fall:		Retning:
			Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

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	Intrusivt komplex:

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Opplysning(er) i fritekstformat

Fri tekst

Denne forekomsten er dobbeltregistert som en REE forekomst i tillegg til jern gjort av kartografiske hensyn Storjord REE malm --------------------------------- Forekomsten ligger på toppen av den 120 m høye Storhaugen, 300 m øst for E6 og 2.5 km sør for Bognes ferjeleie. Malmen er rik, båndet, med 0.2 - 8 mm store magnetittkorn. Malmen er oppstykket i 2 linser p.g.a. granittintrusjonen. Tonnasjen er: Tykkelse Lengde Dyp Tonn spes.v. 4.1 ----------------------------------------------------------------------------------- Storjord, nordre linse: 6.25 m 40 m 20 m 20.500 tonn Storjord, søndre linse: 17.14 m 70 m 50 m 246.000 tonn ----------------------------- SUM: 266.500 tonn ----------------------------- Middelverdi av 6 analyserte prøver fra forekomsten foretatt ved Norsk Jernverk: Fe tot. Fe magn. MnO TiO2 P S 52.1 % 50.9 % 0.40 % 0.90 % 0.080 % 0.005 % Are Korneliussen, NGU har prøvetatt malmen og funnet at sporelementanalyse viser høyt innhold av Y, Ce, La, U og Th. Analyser av 4 prøver viser: Y-% Ce-% La-% U-ppm Th-ppm Co-ppm 0.13 0.33 0.12 40 276 189 0.09 0.26 0.10 311 196 122 0.32 0.68 0.26 185 508 412 0.11 0.52 0.20 2400 331 152

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Müller, Axel , 2010

	Potentials of rare earth element and Zr-, Be-, U-, Th-, (W-)mineralisations in central and northern Nordland

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2010.037;85 s. sider

Abstrakt:

The Geological Survey of Norway (NGU) was contacted by Nordland Mineral (T. Vrålstad) in May 2010 to evaluate the potential of economic rare-earth-element (REE: Ce-Lu, Y) and Zr-mineralisations and related Be-, U-, Th-, (W-) mineralisations in Proterozoic basement windows and overlying Caledonian nappe complexes in central and northern Nordland between Mo i Rana in the south and Ofotfjorden in the north. The economic background for the study is the increasing demand for several of these elements. The general aim is to identify Zr-REE mineralisations with =2 wt.% REE(+Y) which are possibly enriched in Be, U and Th as well. Accessible literature and mineralogical, geochemical and geophysical data on REE-mineralisations and Zr-, Be-, U-, Th-, (W-) mineralisations, which might be associated with REE-mineralisations, were studied in order to indicate potential target areas for future exploration activity. The primary focus was to evaluate the potential of (1) the Høgtuva Be-REE-U-Sn mineralisation, (2) strongly fractionated granite intrusions, (3) REE-fluorite mineralisations, (4) regional REE anomalies in stream sediments and tills, (5) REE-silicates (allanite) in granites, (6) NYF pegmatites, (7) hydrothermal Fe-deposits with associated REE enrichments, (8) Th- and allanite-bearing rocks by checking regional radiometric measurements and (9) basement granites which possibly contain 2-3% REE-oxides by checking NGU databases. The results of the study indicate that mineralisations and mineralisation types named under points (1), (3), (6) and (7) are currently not of economic interest. The major outcome of the study is, that some of the more evolved Proterozoic TIB- type granites (TIB – Trans-Scandinavian Igneous Belt) of the Tysfjord basement window have a potential for sub-economic to economic Zr-REE-mineralisations. The possible carriers of the mineralisation are zircon and allanite. The identified Zr-REE-enriched TIB-2 granites are SiO2-rich, subalkaline, metaluminous A-type (anorogenic) granites with low (Na2O+K2O)/CaO ratios (<6; Figs. 37-40). They represent a specific final fractionation trend of the TIB-2 granites. These mineralisation types are relatively unknown but have been described from Saudi Arabia. Possibly exploration target areas for Zr-REE-mineralised TIB-granites are suggested.

Müller, Axel , 2011

	Potential of rare earth element and Zr-, Be, U-, Th-, (W-) mineralisations in central and northern Nordland - Part 2

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2011.021;56 sider

Abstrakt:

In this report results of the investigation of potential rare earth elements (REE) and Zr-, Be, U-, Th-, (W-) mineralisations in central and northern Nordland are presented. The investigated and sampled mineralisations were proposed in NGU report 2009.037 on the basis if existing reports and geochemical data sets. The investigation targets were evolved Proterozoic TIB-type granites (TIB = Trans-Scandinavian Igneous Belt) of the Tysfjord, Sommerset and Rishaugfjell basement windows, in particular, the Hatten- Tilthornet massif, Hundholmen, Kjerrfjellet, Hellemobotn, Reinoksskardet, upper Gjerdalen areas, the Sommerset basement Window, Rismålsvatn, and Memaurvatn. The general aim was to identify Zr-Ree mineralisations with >= 2wt.% REO (including Y2O3; REO - rare earth oxides) which are possibly enriched in Be, U and Th as well.

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Faktaarket ble generert 22.11.2024

Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no

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