%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Grégoire, M.
%A Jego, S.
%A Maury, R. C.
%A Polvé, Mireille
%A Payot, B.
%A Tamayo, R. A.
%A Yumul, G. P.
%T Metasomatic interactions between slab-derived melts and depleted mantle : insights from xenoliths within Monglo adakite (Luzon arc, Philippines)
%D 2008
%L fdi:010042728
%G ENG
%J Lithos
%@ 0024-4937
%K Mantle xenoliths ; Luzon arc ; Metasomatism ; Dunite ; Trace elements ; Adakite
%M ISI:000257907700007
%N 3-4
%P 415-430
%R 0.1016/j.lithos.2007.10.013
%U https://www.documentation.ird.fr/hor/fdi:010042728
%> https://www.documentation.ird.fr/intranet/publi/2008/08/010042728.pdf
%V 103
%W Horizon (IRD)
%X The Monglo adakite contains mafic and ultramafic xenoliths, which probably originated from the mantle section of an Early Cretaceous supra-subduction zone ophiolitic complex located within the Luzon are crust. Spinel-bearing dunites are dominant among this xenolith collection and display evidence for three episodes of subduction-related melt percolation. The first one is evidenced by an undeformed clinopyroxene characterized by convex-upwards REE pattern. This clinopyroxene crystallized from a calc-alkaline basaltic magma, likely formed in the Cretaceous supra-subduction setting of the ophiolite. Then, two metasomatic events, evidenced by orthopyroxene-rich and amphibole-rich secondary parageneses, respectively, affected most of the spine) dunites. The opx-rich paragenesis is related to the circulation within the dunitic upper mantle of hydrous slab-derived melts similar to those affecting the mantle peridotite xenoliths from Papua New Guinea and Kamchatka. Finally the amphibole-rich veins are related to the interaction between the studied dunite xenoliths and the host adakite or an adakitic melt similar to it.
%$ 064