Permian magmatism and metamorphism in the Dent Blanche nappe: constraints from field observations and geochronology

@article{Manzotti2017PermianMA,
  title={Permian magmatism and metamorphism in the Dent Blanche nappe: constraints from field observations and geochronology},
  author={Paola Manzotti and Daniela Rubatto and Michele Zucali and Afif{\'e} El Korh and B{\'e}n{\'e}dicte Cenki-Tok and Michel Ball{\`e}vre and Martin Engi},
  journal={Swiss Journal of Geosciences},
  year={2017},
  volume={111},
  pages={79-97}
}
In the Dent Blanche Tectonic System, the Mont Morion biotite-bearing granite is a km-scale intrusion preserved in a low-strain volume. Zircon saturation thermometry suggests that it crystallised from a melt that reached about 800 °C. U–Pb zircon and allanite geochronology indicates crystallization of the magma in the Permian (290 ± 3 Ma; 280 ± 8 Ma, respectively). Migmatitic biotite-gneiss and amphibolite are found as xenoliths within the Mont Morion granite and constitute its country-rocks. In… CONTINUE READING

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