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- W2003313600 abstract "L'étude comparative d'enclaves péridotitiques provenant de formations volcaniques oligocènes et quaternaires de la région du lac Tana (Éthiopie) montre que les caractéristiques texturales, minéralogiques, thermiques et géochimiques du manteau lithosphérique de cette région étaient déjà acquises à l'Oligocène ; c'est-à-dire avant l'épanchement des traps et l'individualisation du rift éthiopien. Ces données suggèrent que la mise en place du panache Afar était effective dès cette époque, ce qui plaide en faveur d'un mécanisme de rifting actif pour le point triple est-africain. The comparative study of peridotitic xenoliths from Oligocene and Quaternary volcanic formations of north-western Ethiopia shows that the textural, mineralogical, thermal and geochemical characteristics of the lithospheric mantle of this region were acquired in Oligocene times. These data suggest that the impinging of the Afar plume beneath the Ethiopian lithosphere occurred prior to the traps emplacement and the Plio-Quaternary rifting. This favours a model of active rifting for the Afar triple junction." @default.
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- W2003313600 date "1997-06-01" @default.
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- W2003313600 title "Rifting actif ou passif en Éthiopie ? éléments de réponse apportés par l'étude des xénolites péridotitiques de la région du lac Tana" @default.
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- W2003313600 doi "https://doi.org/10.1016/s1251-8050(97)83986-9" @default.
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