Le magmatisme acide Néo-Protérozoique-Cambrien en Calabre : étude pétrochimique et géochronologique des gneiss oeillés

Abstract : This work consists of geochronological and petrological studies of the augen gneisses outcropping in Calabria (southern Italy). The aim was :1) to characterize the augen gneisses (field and petrographic study) and the magmatism of their protoliths (geochemistry); 2) to fixe the emplacement age of protoliths (U-Pb geochronology on zircon); 3) to obtain information about the source materials (Rb-Sr and Sm-Nd determinations). The overall data point to a similarity between the augen gneisses and the high-K calc-alkaline magmatic products of central Europe and northern-western Africa. The Neo-Proterozoic-Cambrian acidic magmatism in Calabria is related to syn and post-collisional phases of Pan-african orogeny. These results reinforce the idea that the Calabro-Peloritan terrane was a part of the Alboran microplate, localized at northern margin of Gondwana between Proterozoic and Cambrian ages (peri-Gondwana terranes).
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Francesca Micheletti. Le magmatisme acide Néo-Protérozoique-Cambrien en Calabre : étude pétrochimique et géochronologique des gneiss oeillés. Sciences de la Terre. Université Henri Poincaré - Nancy 1, 2005. Français. ⟨NNT : 2005NAN10007⟩. ⟨tel-01748089⟩

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