Metadolerite geochronology and dolerite geochemistry from East Finnmark, northern Scandinavian Caledonides

Dolerite dykes in the East Finnmark Scandinavian Caledonides form three geochemical suites: Digermulhalvøya–Magerøya – WNW–ESE-trending, c. 337–332 Ma, possibly also c. 293 Ma, continental within-plate; East Varangerhalvøya – NE–SW and N–S, c. 376 Ma, continental plate-margin; Styret – NE–SW, also c...

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Veröffentlicht in:	Geological magazine 2004-05, Vol.141 (3), p.301-318
Hauptverfasser:	RICE, A. H. N., NTAFLOS, T., GAYER, R. A., BECKINSALE, R. D.
Format:	Artikel
Sprache:	eng
Schlagworte:	absolute age Ar/Ar basalts basement Caledonides chemical composition chemical ratios cleavage Commonwealth of Independent States dates deformation diabase Digermulhalvoya-Mageroya Suite dikes dolerite East Varangerhalvoya Suite Europe Finnmark Norway foliation fracturing Geochemistry Geochronology Geology igneous rocks intrusions K/Ar major elements mantle metaigneous rocks metamorphic rocks mid-ocean ridge basalts nappes Neoproterozoic nesosilicates Norway Original Article orogeny orthosilicates Paleozoic petrography Plate tectonics plutonic rocks Precambrian Proterozoic rock, sediment, soil Russian Federation Scandinavia Sediments silicates spectra structural analysis Styret Suite Sweden tectonics tectonostratigraphic units Timan-Pechora region trace elements U/Pb upper Precambrian volcanic rocks Western Europe X-ray fluorescence spectra zircon zircon group
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