Timescales of Water Accumulation in Magmas and Implications for Short Warning Times of Explosive Eruptions
| Autor: | Y. Le Guer, Maurizio Petrelli, Laura Spina, K. El Omari, G. La Spina, Diego Perugini |
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| Přispěvatelé: | Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME), Université de Pau et des Pays de l'Adour (UPPA), Department of Earth Sciences [Perugia], Università degli Studi di Perugia (UNIPG) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Chemistry(all)
010504 meteorology & atmospheric sciences Science General Physics and Astronomy Volcanology Physics and Astronomy(all) 010502 geochemistry & geophysics volcanic eruption 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Magma genesis lcsh:Science Petrology 0105 earth and related environmental sciences magma migration water content [PHYS]Physics [physics] Multidisciplinary Explosive eruption Biochemistry Genetics and Molecular Biology(all) volcanic plumbing system Natural hazards General Chemistry Earth surface 13. Climate action Magma lcsh:Q Timescales of pre-eruptive processes volcanic plumbing system magma migration volcanic eruption water content Timescales of pre-eruptive processes Geology |
| Zdroj: | Nature Communications Nature Communications, Nature Publishing Group, 2018, 9 (1), pp.art. 770. ⟨10.1038/s41467-018-02987-6⟩ Petrelli, M, El Omari, K, Spina, L, Le Guer, Y, La Spina, G & Perugini, D 2018, ' Timescales of water accumulation in magmas and implications for short warning times of explosive eruptions ', Nature Communications, vol. 9, no. 1, 770 . https://doi.org/10.1038/s41467-018-02987-6 Nature Communications, Vol 9, Iss 1, Pp 1-14 (2018) |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-018-02987-6⟩ |
| Popis: | Water plays a key role in magma genesis, differentiation, ascent and, finally, eruption. Despite the recognized crucial function of water, there are still several issues that continue to blur our view about its role in magmatic systems. What are the timescales of H2O accumulation in crystallizing magmas? What are the ascent rates of water-rich residual melts leading to explosive eruptions? Here, we track the timescale of water accumulation in a residual melt resulting from crystallization of a hydrous CO2-bearing magmatic mass stored at mid- to deep-crustal levels in a subduction-related geodynamic setting. Our results indicate that, after a repose period ranging from few to several thousand years, water-rich melts with water concentrations larger than 6–9 wt.% can migrate towards the Earth surface in very short timescales, on the order of days or even hours, possibly triggering explosive eruptions with short warning times and devoid of long-term geophysical precursors. Volatiles such as water play a key role in magma ascent and ultimately triggering explosive eruptions. Here, the authors show that water-rich melts with water concentrations of 6–9 wt.% can ascend rapidly to the surface over the timescales of hours to days with very short warning times. |
| Databáze: | OpenAIRE |
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