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Fumarole - Springer Nature

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Last Updated: 02 March 2022

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Probing the hidden magmatic evolution of El Misti volcano (Peru) with the Pb isotope composition of fumaroles

This paper explores the unobstructive growth of erupting Andean volcanoes from the Pb isotope mixture of gases. To reconstruct the mean composition of degassing magmas, gas condensates and Pb-rich solid deposits gathered in 2018 in the bottom of El Misti crater at 260-150°C fumarole vents were used. On the other hand, the tiny but significant difference between the instantaneous composition discovered in gas condensates and the time-integrated composition found in solid deposits suggests to degassing of less evolved magmas over the past two decades. This pattern is attributed to a recent recharge of El Misti reservoir with hot mafic magmas, in accordance with the evolution of fumarolic deposit mineralogy in the last half a century. Assimilation-fractional crystallization occurs, the Pb isotope component of gas seems to be a promising probe into the uninhibited magmatic evolution of quiescent volcanoes.

Source link: https://doi.org/10.1007/s00445-021-01521-9

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions