Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146071
Title: Crystals reveal magma convection and melt transport in dyke-fed eruptions
Authors: Albert, Helena
Larrea, Patricia
Costa, Fidel
Widom, Elisabeth
Siebe, Claus
Keywords: Science::Geology
Issue Date: 2020
Source: Albert, H., Larrea, P., Costa, F., Widom, E., & Siebe, C. (2020). Crystals reveal magma convection and melt transport in dyke-fed eruptions. Scientific Reports, 10, 11632-. doi:10.1038/s41598-020-68421-4
Project: NRF-NRFI2017-06 
Journal: Scientific Reports 
Abstract: The processes and ranges of intensive variables that control magma transport and dyke propagation through the crust are poorly understood. Here we show that textural and compositional data of olivine crystals (Mg/Fe, Ni and P) from the tephra of the first months of Paricutin volcano monogenetic eruption (Mexico, 1943–1952) record fast growth and large temperature and oxygen fugacity gradients. We interpret that these gradients are due to convective magma transport in a propagating dyke to the Earth’s surface in less than a few days. The shortest time we have obtained is 0.1 day, and more than 50% of the calculated timescales are < 2 days for the earliest erupted tephra, which implies magma ascent rates of about 0.1 and 1 m s−1. The olivine zoning patterns change with the eruptive stratigraphy, and record a transition towards a more steady magma flow before the transition from explosive to effusive dynamics. Our results can inform numerical and experimental analogue models of dyke propagation, and thus facilitate a better understanding of the seismicity and other precursors of dyke-fed eruptions.
URI: https://hdl.handle.net/10356/146071
ISSN: 2045-2322
DOI: 10.1038/s41598-020-68421-4
Rights: © 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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