Two contrasting magmatic types coexist in the Izu-Bonin back-arc area after the cessation of back-arc spreading

Abstract

The Izu-Bonin arc to back-arc system gives us the chance to examine magmatism in the period following back-arc spreading but with on-going subduction. This stage in arc evolution is characterised by widespread across arc volcanism and the occurrence of two contrasting and contemporaneous magmas.