During subduction, both subducted slab material and the overlying mantle undergo melting
Subduction zone petrology and geochemical evidence support the view that both subducted slab materials and the overlying mantle wedge undergo partial melting driven by dehydration and thermal/fluid interactions.
The retrieved papers provide multiple lines of evidence showing that subducted slabs undergo melting (e.g., sediment and altered oceanic crust melting) and that the overlying mantle (or mantle wedge/forearc mantle) is simultaneously involved in melting and metasomatism to generate arc magmas.
Li HY, Zhao RP, Li J, Tamura Y, Spencer C, Stern RJ, Ryan JG, Xu YG. Molybdenum isotopes unmask slab dehydration and melting beneath the Mariana arc.. 2021. https://doi.org/10.1038/s41467-021-26322-8
Paper 0 discusses both slab-derived melts and the involvement of the overlying forearc mantle in melting processes beneath arcs.
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Li H, Hermann J, Zhang L. Melting of subducted slab dictates trace element recycling in global arcs.. 2022. https://doi.org/10.1126/sciadv.abh2166
Paper 3 highlights the role of subducted slab melting and its interaction in generating arc magmas.
Gülmez F, Prelević D, Förster MW, Buhre S, Günther J. Experimental production of K-rich metasomes through sediment recycling at the slab-mantle interface in the fore-arc.. 2023. https://doi.org/10.1038/s41598-023-46367-7
Paper 5 details the melting and reactions occurring at the slab-mantle interface involving subducted sediment and mantle peridotite.
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