Abstract
The primary liquid of partial fusion, in the Beni Bousera ultra-basic Massif (Morocco), gives, by fractionnal cristallization, various assemblages that can be distinguished on the basis of ore mineral associations and silicate paragenesis. Residual liquids, of variable compositions, would have cristallized as garnet clinopyroxenites, with granulite facies primary assemblages (Ca Tschermak rich cpx + garnet + ilmenite) or eclogite facies primary assemblages (omphacitic cpx + garnet + rutile).
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