Title: Complex Mantle-Crust Interaction in Subduction Zone
Abstract: Besides the interaction of fluid derived from the dehydration of subducted slab with the mantle wedge peridotites, the interaction of slab-derived melt with overlying mantle has also been found in the subduction zone. The adakites and associated Nb-enriched basalts and magnesian andesites are the products of interaction of slab-derived melt with mantle peridotites. The interaction of adakitic slab-derived melt with mantle wedge leads to increase of Mg,Nb,Ti,P and Nd/Sr,and decrease of Si,K,Na and La/Yb. Three models have been proposed for the slab melting: 1,subduction of young oceanic slab or oceanic ridge;2,underplating of basaltic magma in lower cruts;3, breaking off or tearing of subducted slab.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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Cited By Count: 9
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