Low δ18O silicic volcanic rocks at the Calabozos caldera complex, southern Andes

@article{Grunder1987LowS,
  title={Low δ18O silicic volcanic rocks at the Calabozos caldera complex, southern Andes},
  author={A. Grunder},
  journal={Contributions to Mineralogy and Petrology},
  year={1987},
  volume={95},
  pages={71-81}
}
  • A. Grunder
  • Published 1987
  • Geology
  • Contributions to Mineralogy and Petrology
  • Sr- and Pb-isotope data from the Calabozos center (87Sr/86Sr=∼ 0.7043, 206Pb/204Pb=18.64–18.66, 207Pb/204Pb=15.59–15.60, 208Pb/204Pb=38.52–38.55) fall within the range of values reported for the southern volcanic zone (33–42° S) of the Andean arc. The range of δ18O (5.0–6.3), however, includes unusually low values compared to volcanic rocks of similar bulk composition in the region. The Calabozos caldera complex lies at 35 °30′ S, where the continental crust under the Andes thins southward from… CONTINUE READING
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    Volcán Quizapu, Chilean Andes
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