Fig. 4From: Pre-eruption magmatic processes and magma plumbing system at Hachijo-Nishiyama volcano, Izu–Bonin arc, Japana Primitive mantle-normalized trace-element concentrations and b primitive mantle-normalized rare-earth element concentrations of the representative samples from the Nishiyama volcano. The trace element concentrations of the primitive mantle are taken from Sun and McDonough (1989). Symbols as in Fig. 3Back to article page