Compositional Layering in Io Driven by Magmatic Segregation and Volcanism
Autor: | Ian Hewitt, Richard F. Katz, Dan C. Spencer, Laszlo P. Keszthelyi, David May |
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Rok vydání: | 2020 |
Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Compaction FOS: Physical sciences Tidal heating Volcanism 01 natural sciences Geophysics (physics.geo-ph) Physics - Geophysics Heat pipe Geophysics Volcano 13. Climate action Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Layering Petrology Geology Astrophysics - Earth and Planetary Astrophysics 0105 earth and related environmental sciences |
Zdroj: | Journal of Geophysical Research: Planets |
ISSN: | 2169-9097 |
DOI: | 10.1029/2020je006604 |
Popis: | Magmatic segregation and volcanic eruptions transport tidal heat from Io's interior to its surface. Several observed eruptions appear to be extremely high temperature ($\geq$ 1600 K), suggesting either very high degrees of melting, refractory source regions, or large amounts of viscous heating on ascent. To address this ambiguity, we develop a model that couples crust and mantle dynamics to a simple compositional system. We analyse the model to investigate chemical structure and evolution. We demonstrate that magmatic segregation and volcanic eruptions lead to differentiation of the mantle, the extent of which depends on how easily high temperature melts from the more refractory lower mantle can migrate upwards. We propose that Io's highest temperature eruptions originate from this lower mantle region, and that such eruptions act to limit the degree of compositional differentiation. Accepted at Journal of Geophysical Research: Planets |
Databáze: | OpenAIRE |
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