The Nevados de Payachata volcanic region (18°S/69°W, N. Chile) II. Evidence for widespread crustal involvement in Andean magmatism

@article{Davidson1990TheND,
  title={The Nevados de Payachata volcanic region (18°S/69°W, N. Chile) II. Evidence for widespread crustal involvement in Andean magmatism},
  author={J. Davidson and N. McMillan and S. Moorbath and G. W{\"o}rner and R. Harmon and L. Lopez-escobar},
  journal={Contributions to Mineralogy and Petrology},
  year={1990},
  volume={105},
  pages={412-432}
}
Volcanism extending over 11 Ma is represented in the rocks of the Nevados de Payachata region, culminating in the formation of two large composite stratocones within the last 500 000 years. Chemically distinct mafic magmas are erupted at a number of parasitic centers. These cannot be related to each other by crystal fractionation and do not appear to be direct parents for the differentiated suites of the composite cones. Two distinct trends are defined by the intermediate and evolved rocks; a… Expand
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