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Sebastian F. L. Watt, David M. Pyle, Tamsin A. Mather and José A. Naranjo Arc magma compositions controlled by linked thermal and chemical gradients above the subducting slab Geophysical Research Letters 40

Version of Record online: 4 JUN 2013 | DOI: 10.1002/grl.50513

Key Points

  • Mafic arc rocks preserve a systematic down-slab magma chemical gradient
  • This reflects increasing dominance of hydrous melts in the slab flux
  • This change, over a few km, is a first-order control on melt chemistry

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