Mantle heterogeneity records by xenoliths beneath In Teria (SE Algeria)

along a high heat flow (100-120 mW.m-2). In Teria area is composed of melilite pipe, which contains xenolith of spinel and garnet peridotite, pyroxenite, mega-crystals of amphibole. This study provides constraints on reaction/percolation processes recorded by the mantle and allow to tracking melt sources. Garnet and spinel peridotites record percolation of alkali silicated magmas allowing phlogopite and/or amphibole formation. The spinel peridotites record carbonatitic metasomatism producing melt pocket with clinopyroxene (cpx), olivine, feldspath. The garnet peridotite expresses a deep deformation corresponding to a slip (010)[001] system. The spinel peridotites display gliding along [001] maxima axe and epitaxy underline by amphibole and cpx crystallization. Trace element pattern of clinopyroxene in garnet peridotit