Formation of hybrid arc andesites beneath thick continental crust

  title={Formation of hybrid arc andesites beneath thick continental crust},
  author={S. Straub and A. G{\'o}mez-Tuena and F. Stuart and G. Zellmer and R. Espinasa-Pere{\~n}a and Yue Cai and Y. Iizuka},
  journal={Earth and Planetary Science Letters},
Abstract Andesite magmatism at convergent margins is essential for the differentiation of silicate Earth, but no consensus exists as to andesite petrogenesis. Models proposing origin of primary andesite melts from mantle and/or slab materials remain in deadlock with the seemingly irrefutable petrographic and chemical evidence for andesite formation through mixing of basaltic mantle melts with silicic components from the overlying crust. Here we use 3He/4He ratios of high-Ni olivines to… Expand

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