Caractérisation du manteau supérieur patagonien: les enclaves ultramafiques et mafiques dans les laves alcalines

Abstract : My thesis attempted to characterize the Patagonian lithospheric mantle through the petrologic and geochemical study of mantle xenoliths sampled by Cenozoïc alkaline basalts occurring in a back arc environment. The North Patagonian mantle xenoliths preserve important imprints of partial melting processes whereas those from the South evidence huge circulations of melts that largely obliterated the partial melting imprints. Finally, this study proposes that metasomatic liquid(s) have reacted on a large scale with the patagonian back arc upper mantle, especially in the South. These metasomatic agents are mostly silicated mafic alkaline melts and are certainly related to
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Géochimie. Université Paul Sabatier - Toulouse III, 2007. Français


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Céline Dantas. Caractérisation du manteau supérieur patagonien: les enclaves ultramafiques et mafiques dans les laves alcalines. Géochimie. Université Paul Sabatier - Toulouse III, 2007. Français. <tel-00163376>

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