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Lavallée Y, Dingwell DB, Johnson JB, et al. Thermal vesiculation during volcanic eruptions. Nature. 2015;528(7583):544-7doi: 10.1038/nature16153.
Lavallée, Y., Dingwell, D. B., Johnson, J. B., Cimarelli, C., Hornby, A. J., Kendrick, J. E., von Aulock, F. W., Kennedy, B. M., Andrews, B. J., Wadsworth, F. B., Rhodes, E., & Chigna, G. (2015). Thermal vesiculation during volcanic eruptions. Nature, 528(7583), 544-7. https://doi.org/10.1038/nature16153
Lavallée, Yan, et al. "Thermal vesiculation during volcanic eruptions." Nature vol. 528,7583 (2015): 544-7. doi: https://doi.org/10.1038/nature16153
Lavallée Y, Dingwell DB, Johnson JB, Cimarelli C, Hornby AJ, Kendrick JE, von Aulock FW, Kennedy BM, Andrews BJ, Wadsworth FB, Rhodes E, Chigna G. Thermal vesiculation during volcanic eruptions. Nature. 2015 Dec 24;528(7583):544-7. doi: 10.1038/nature16153. PMID: 26701056.
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Nature. 2015 Dec 24;528(7583):544-7. doi: 10.1038/nature16153.

Thermal vesiculation during volcanic eruptions.

Nature

Yan Lavallée, Donald B Dingwell, Jeffrey B Johnson, Corrado Cimarelli, Adrian J Hornby, Jackie E Kendrick, Felix W von Aulock, Ben M Kennedy, Benjamin J Andrews, Fabian B Wadsworth, Emma Rhodes, Gustavo Chigna

Affiliations

  1. Department of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool L69 3GP, UK.
  2. Department of Earth and Environmental Sciences, Ludwig Maximilian University of Munich, Theresienstrasse 41/III, 80333 Munich, Germany.
  3. Department of Geosciences, Boise State University, Boise, Idaho, USA.
  4. Geological Sciences, University of Canterbury, Private Bag 4800, 8140 Christchurch, New Zealand.
  5. Department of Mineral Sciences, Smithsonian Institution, Washington, District of Columbia, USA.
  6. Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hydrologia (INSIVUMEH), 7a Avenue 14-57, Zone 13, Guatemala City, Guatemala.

PMID: 26701056 DOI: 10.1038/nature16153

Abstract

Terrestrial volcanic eruptions are the consequence of magmas ascending to the surface of the Earth. This ascent is driven by buoyancy forces, which are enhanced by bubble nucleation and growth (vesiculation) that reduce the density of magma. The development of vesicularity also greatly reduces the 'strength' of magma, a material parameter controlling fragmentation and thus the explosive potential of the liquid rock. The development of vesicularity in magmas has until now been viewed (both thermodynamically and kinetically) in terms of the pressure dependence of the solubility of water in the magma, and its role in driving gas saturation, exsolution and expansion during decompression. In contrast, the possible effects of the well documented negative temperature dependence of solubility of water in magma has largely been ignored. Recently, petrological constraints have demonstrated that considerable heating of magma may indeed be a common result of the latent heat of crystallization as well as viscous and frictional heating in areas of strain localization. Here we present field and experimental observations of magma vesiculation and fragmentation resulting from heating (rather than decompression). Textural analysis of volcanic ash from Santiaguito volcano in Guatemala reveals the presence of chemically heterogeneous filaments hosting micrometre-scale vesicles. The textures mirror those developed by disequilibrium melting induced via rapid heating during fault friction experiments, demonstrating that friction can generate sufficient heat to induce melting and vesiculation of hydrated silicic magma. Consideration of the experimentally determined temperature and pressure dependence of water solubility in magma reveals that, for many ascent paths, exsolution may be more efficiently achieved by heating than by decompression. We conclude that the thermal path experienced by magma during ascent strongly controls degassing, vesiculation, magma strength and the effusive-explosive transition in volcanic eruptions.

References

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