Eo-alpine eclogitisation of Permian MORB-type gabbros in the Koralpe (Eastern Alps, Austria) new geochronological, geochemical and petrological data》.pdf

Eo-alpine eclogitisation of Permian MORB-type gabbros in the Koralpe (Eastern Alps, Austria) new geochronological, geochemical and petrological data》.pdf

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Eo-alpine eclogitisation of Permian MORB-type gabbros in the Koralpe (Eastern Alps, Austria) new geochronological, geochemical and petrological data》.pdf

,NCL”LwG ISOTOPE GEOSCIENCE ELSEVIER Chemical Geology 137 (1997) 283-310 Eo-Alpine eclogitisation of Permian MORB-type gabbros in the 1 * 1 Koralpe ( Eastern Alps, Austria) : new geochronoroglcar, geochemical and petrological data Christine Miller a, Martin Thijni b,* aInstitutfir Mineralogie und Petrographic, Universitiit Innsbruck, Innrain 52, A-6020 Innsbruck, Austria b Institutjir Geologie, Geozentrum, AlthanstraJe 14, A-1090 Vienna, Austria Received 20 August 1996; accepted 24 November 1996 Abstract New petrological, geochemical and isotopic data (Sm-Nd, Rb-Sr) from (meta-)gabbros, eclogites and metapelites from the southern Koralpe are presented. Pl-Cpx gabbros (mostly olivine-free) that have preserved their magmatic minerals to varying extent occur as relics within eclogites. Transformation of gabbro into eclogite is documented in different stages ranging from macro- to microscale. Based on textur

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