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	(Objekt Id: ) (Sist oppdatert: 12.04.2016)

Lokalisering

Fylke:

Kommune:

Mangler ()

Kart 1:50000:

Porsgrunn (1713-2)

Kart 1:250000:

Skien

Fylke:

UTM-Zone 33 - EUREF89/WGS84

Ressurs

	Ressurstype:	Spesialmetaller (Nb,Ta,Be,Li,Sc,REE)	Ressursundertype:	REE-metaller
			Element(er):	REE

Betydning

Råstoffbetydning:

Ikke vurdert (reg. 06.05.2015)

Mineralisering

Æra: Paleozoikum Periode: Perm

Datering: 300 million år Metode:

Genese: Pegmatittdannelse Form:

Hovedtekstur: Min. fordeling:

Kornstørrelse: Hovedomvandling:

Strøk/Fall: Retning:

Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

Æra: Periode:

Provins:

Geotek.enhet:

Tektonisk complex:

Intrusivt komplex:

Gruppe: Formasjon:

Mineralogi

Relasjon Mineral Mengde

Gangmineral Amfibol Hovedmineral (>10%)

Gangmineral Albitt Hovedmineral (>10%)

Gangmineral Ægirin Hovedmineral (>10%)

Gangmineral Nefelin Hovedmineral (>10%)

Malmmineral Eudialytt gruppen Aksessorisk mineral (<1%)

Malmmineral Hingganitt Aksessorisk mineral (<1%)

Malmmineral Loparitt Aksessorisk mineral (<1%)

Malmmineral Mosandritt Aksessorisk mineral (<1%)

Malmmineral Parisitt Aksessorisk mineral (<1%)

Malmmineral Gadolinitt Aksessorisk mineral (<1%)

Malmmineral Kainositt Aksessorisk mineral (<1%)

Malmmineral Monazitt Aksessorisk mineral (<1%)

Malmmineral Xenotim Aksessorisk mineral (<1%)

Malmmineral Chevkinitt Aksessorisk mineral (<1%)

Malmmineral Britholitt Aksessorisk mineral (<1%)

Malmmineral Bastnäsitt Aksessorisk mineral (<1%)

Malmmineral Allanitt Aksessorisk mineral (<1%)

Malmmineral Ancylitt Aksessorisk mineral (<1%)

Litologi:

Relasjon Bergart Opprinnelse

Vertsbergart Nepheline syenite Intrusiv
Opprinnelig bergart :Syenittpegmatitt

Opplysning(er) i fritekstformat

Fri tekst

The Langesundsfjord is part of the Permian Oslo Rift Province and one of the classic occurrences of peralkaline rocks. Some pegmatites are characterised by agpaite mineral associations. The location referenced here represents one of the observation points mentioned in literature; however, there are several occurrences spread over the Langesundsfjord and the area east of Langesundsfjord (see literature for details). Some of the pegmatites have been hydrothermally overprinted and are characterised by the presence of a variety of magmatic and hydrothermal minerals. Consequently, some of the minerals mentioned here as (potential) ore minerals are restricted to certain environments.

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Andersen, T.; Erambert, M.; Larsen, A.O.; Selbekk, R. , 2010

Petrology of nepheline syenite pegmatites in the Oslo Rift, Norway: Zirconium silicate mineral assemblages as indicators of alkalinity and volatile fugacity in mildly agpaitic magma

;Oxford University Press;ARTIKKEL;Jounrnal of petrology; No.51 (11);2303-2325 sider

Brøgger, W.C. , 1890

Die Mineralien der Syenitpegmatitgänge der Südnorwegischen Augit- und Nephelinsyenite

;Verlag von Wilhelm Engelmann;BOK;Zeitschrift für Krystallographie und Mineralogie; No.16;4-658 sider

Schilling, J.; Wu, F.-Y.; McCammon, C.; Wenzel, T.; Marks, M.A.W.; Pfaff, K.; Jacob, D.E.; Markl, G. , 2011

The compositional variability of eudialyte-group minerals

;Mineralogical Society London;ARTIKKEL;Mineralogical magazine; No.75 (1);87-115 sider

Larsen, Alf Olav ; Dahlgren, Sven ; Berge, Svein Arne ; Andersen, Frode ; Larsen, Knut Edvard ; Burvald, Ingulv , 2010

The Langesundsfjord. History, geology, pegmatites, minerals

;Bode Verlag, Salzhemmendorf, Germany;BOK;239 s. sider

Abstrakt:

Larsen, Bjørn T.; Olaussen, Snorre; Sundvoll, Bjørn; Heeremans, Michel , 2008

The Permo-Carboniferous Oslo Rift through six stages and 65 million years

;IUGS;ARTIKKEL;Episodes; No.31 (1);52-58 sider

Abstrakt:

The Oslo Rift is the northernmost part of the Rotliegendes basin system in Europe. The rift was formed by lithospheric stretching north of the Tornquist fault system and is related tectonically and in time to the last phase of the Variscan orogeny. The main graben forming period in the Oslo Region began in Late Carboniferous, culminating some 20-30 Ma later with extensive volcanism and rifting, and later with uplift and emplacement of major batholiths. It ended with a final termination of intrusions in the Early Triassic, some 65 Ma after the tectonic and magmatic onset.

Neumann, Else-Ragnhild; Wilson, Marjorie; Heeremans, Michel; Spencer, Elizabeth Ann; Obst, Karsten; Timmerman, Martin J.; Kirstein, Linda , 2004

Carboniferous-Permian rifting and magmatism in southern Scandinavia and northern Germany: a review.

;Geological Society of London;ARTIKKEL;Geological Society Special Publication; No.223;11-40 sider

Larsen, A.O. , 1996

Rare earth minerals from the syenite pegmatites in the Oslo Region, Norway

;Chapman & Hall;ARTIKKEL;Mineralogical Society Series; No.7;151-166 sider

Æra:	Paleozoikum	Periode:	Perm
Datering:	300 million år	Metode:
Genese:	Pegmatittdannelse	Form:
Hovedtekstur:		Min. fordeling:

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

Relasjon	Mineral	Mengde
Gangmineral	Amfibol	Hovedmineral (>10%)
Gangmineral	Albitt	Hovedmineral (>10%)
Gangmineral	Ægirin	Hovedmineral (>10%)
Gangmineral	Nefelin	Hovedmineral (>10%)
Malmmineral	Eudialytt gruppen	Aksessorisk mineral (<1%)
Malmmineral	Hingganitt	Aksessorisk mineral (<1%)
Malmmineral	Loparitt	Aksessorisk mineral (<1%)
Malmmineral	Mosandritt	Aksessorisk mineral (<1%)
Malmmineral	Parisitt	Aksessorisk mineral (<1%)
Malmmineral	Gadolinitt	Aksessorisk mineral (<1%)
Malmmineral	Kainositt	Aksessorisk mineral (<1%)
Malmmineral	Monazitt	Aksessorisk mineral (<1%)
Malmmineral	Xenotim	Aksessorisk mineral (<1%)
Malmmineral	Chevkinitt	Aksessorisk mineral (<1%)
Malmmineral	Britholitt	Aksessorisk mineral (<1%)
Malmmineral	Bastnäsitt	Aksessorisk mineral (<1%)
Malmmineral	Allanitt	Aksessorisk mineral (<1%)
Malmmineral	Ancylitt	Aksessorisk mineral (<1%)

	Relasjon	Bergart	Opprinnelse
	Vertsbergart	Nepheline syenite	Intrusiv Opprinnelig bergart :Syenittpegmatitt