Géochimie isotopique du lithium dans les basaltes-Géochimie des ...

tel-00344949, version 1 - 7 Dec 2008
2. Article soumis à EPSL
Figure 2.6 : Simplified geological map showing major features of the Chaîne des Puys
volcanic activity, as well as sample numbers.
Petrographic and mineralogical data �summarized in Boivin et al., 2004� as well as
major and trace element data are consistent with a magmatic evolution mainly controlled
by fractional crystallization of mafic melts, and involving separation of kaersutitic
amphibole in intermediate magmas �Maury et al., 1980; Villemant et al., 1980, 1981�. In
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