Anhydrite-bearing pumices from Mount Pinatubo: further evidence for the existence of sulphur-rich silicic magmas

@article{Bernard1991AnhydritebearingPF,
  title={Anhydrite-bearing pumices from Mount Pinatubo: further evidence for the existence of sulphur-rich silicic magmas},
  author={Alain Bernard and D. Demaiffe and N. Mattielli and Raymundo S. Punongbayan},
  journal={Nature},
  year={1991},
  volume={354},
  pages={139-140}
}
THE eruption of EI Chichón in 1982 showed that relatively small but sulphur-rich eruptions from calc-alkaline volcanoes can produce long-lived stratospheric clouds of sulphate aerosols1,2, which affect the global climate3,4. Here we report the presence of primary anhydrite (CaSO4) phenocrysts in dacitic pumice clasts from the 14–15 June eruption of Mount Pinatubo, which clearly shows that the Mount Pinatubo magma is also rich in sulphur. The post-eruptive sulphur content of the Pinatubo pumices… CONTINUE READING

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