Genesis of high Mg# andesites and the continental crust

@article{Kelemen1995GenesisOH,
  title={Genesis of high Mg\# andesites and the continental crust},
  author={Peter B. Kelemen},
  journal={Contributions to Mineralogy and Petrology},
  year={1995},
  volume={120},
  pages={1-19}
}
  • P. Kelemen
  • Published 1 May 1995
  • Geology
  • Contributions to Mineralogy and Petrology
The continental crust has an andesitic composition with high Mg/(Mg+Fe) and Ni contents which may be too high to have formed by differentiation of basaltic magmas. Instead, mantle-derived, high Mg# andesites (HMA) may form a substantial component of the crust. HMA may be produced by partial melting of previously depleted, subsequently metasomatised mantle peridotite. However, they are more likely produced by reaction between ascending melts and mantle peridotite. HMA are less common than… 
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