Volcanic Arcs and Outer Arcs

Part of the Lecture Notes in Earth Sciences book series (LNEARTH, volume 136)


Primitive magma has been found to finally solidify as a granitic pluton after transformation to dacitic magma of a chemical composition identical to the composition of the upper continental crust. This granitic pluton and the associated cumulate also have been found to form the two-layered continental crust. In addition, parental magma also has been found to evolve to volcanic rocks of mostly andesitic composition via extrusion from the chamber to the surface during this magmatic transformation. However, there is no need for the magma in the upper chamber to be extruded to the surface, because the coupled chambers form a reservoir system that can repeatedly and smoothly accept parental magma from the mantle with no extrusion of magma.


Granitic Pluton Volcanic Front Magma Supply Bonin Island Pacific Ocean Side 
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© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.FukuokaJapan

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