Fig. 2: Trace element constraints on the metasomatic agents in mantle source.
From: India–Eurasia convergence speed-up by passive-margin sediment subduction
a,b, Diagrams showing the possible enriched components in the mantle source of the Late Cretaceous–Early Cenozoic magmatic rocks of the Gangdese arc, Ba/La versus Th/Yb (a) and Rb/Nb versus Th/Yb (b) (also see Extended Data Figs. 2 and 3). c,d, Diagrams showing the possible contribution of subducted sediments in the mantle source of the Late Cretaceous–Early Cenozoic magmatic rocks of the Gangdese arc, Lu/Hf versus Th/La (c) and Lu/Hf versus Th/Yb (d). The directions of the arrows indicate that the magmatic rocks before 65 Ma and after 60 Ma were mainly modified by slab fluid and samples between 65 and 60 Ma were mainly modified by terrigenous sediment melt, respectively. The grey diamonds and squares show a comparison of mafic rocks between the modern continental arcs (Kamchatka and Honshu) and oceanic arcs (Izu–Bonin–Mariana) in the western Pacific. Data for the Kamchatka, Honshu and Izu–Bonin–Mariana arcs are collected from the database GEOROC (http://georoc.mpchmainz.gwdg.de/georoc).
