Subduction erosion and arc volcanism

Subduction erosion: Rates, mechanisms, and its role in arc magmatism and the evolution of the continental crust and mantle

Late Cenozoic tephrostratigraphy offshore the southern Central American Volcanic Arc: 2. Implications for magma production rates and subduction erosion

Arc magmas sourced from mélange diapirs in subduction zones

At subduction zones, crustal material is recycled back into the mantle. A certain proportion, however, is returned to the overriding plate via magmatism. The magmas show a characteristic range of compositions that have been explained by three-component mixing in their source regions: hydrous fluids derived from subducted altered oceanic crust and components derived from the thin sedimentary ven...

Thermal structure and dynamics of subduction zones: insights from observations and modeling

Subduction zones form dominant tectonic features on the Earth and are the site of large underthrusting earthquakes and explosive arc volcanism. They are also the only locations with deep earthquakes in the Earth’s interior. Major questions remain regarding the dynamics of subduction zones, including aspects such as the role of water in the formation of arc volcanism and deep earthquakes, the in...

Early stages in the evolution of Izu–Bonin arc volcanism: New age, chemical, and isotopic constraints

A remarkable record of early arc volcanism in the Izu–Bonin–Mariana (IBM) arc is exposed in and around the Bonin Islands, an uplifted segment of the IBM forearc. New Ar/Ar dating results imply that the boninitic volcanism on Chichijima Island occurred in a brief period during Eocene time, between 46–48 Ma. A slightly younger volcanic succession is identified along the Bonin Ridge, including 44....