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THE ???? DATABASE
Occurence 0 - 000 FEIL
(Object Id: )
(Last updated: 12.04.2016)

Location
County: Municipality: Mangler ()
Map 1:50000: Porsgrunn (1713-2) Map 1:250000: Skien
County: UTM-Zone 33 - EUREF89/WGS84

Resource
Resource Type: Special metals (Nb,Ta,Be,Li,Sc,REE) Resource Subtype: REE-metals
Element(s): REE
Importance
Raw material meaning: Not Assessed (reg. 06.05.2015)


Mineralization
Era: Paleozoic Period: Permian
Dating: 300 million year Method:
Genesis: Pegmatite formation Form:
Main texture: Min. distribution:
Main grain size: Main alteration:
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Period:
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Albite Major mineral (>10%)
Gangue mineral Aegirine Major mineral (>10%)
Gangue mineral Nepheline Major mineral (>10%)
Ore mineral Eudialyte group Accessory mineral (<1%)
Ore mineral Hingganite Accessory mineral (<1%)
Ore mineral Loparite Accessory mineral (<1%)
Ore mineral Mosandrite Accessory mineral (<1%)
Ore mineral Parisite Accessory mineral (<1%)
Ore mineral Gadolinite Accessory mineral (<1%)
Ore mineral Kainosite Accessory mineral (<1%)
Ore mineral Monazite Accessory mineral (<1%)
Ore mineral Xenotime Accessory mineral (<1%)
Ore mineral Chevkinite Accessory mineral (<1%)
Ore mineral Britholite Accessory mineral (<1%)
Ore mineral Bastnäsite Accessory mineral (<1%)
Ore mineral Allanite Accessory mineral (<1%)
Ore mineral Ancylite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock nepheline syenite Intrusive
Original rock :Syenite pegmatite

Information(s) in free text format
Free text
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.

Bibliography:
From NGU's Reference Archive:
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 pages

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 pages

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 pages

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. pages
Abstract:

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 pages
Abstract:
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 pages

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 pages


The fact sheet was created on 29.03.2024

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