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SUMMARY:The effects of planetary-scale volcanism on Io's interior structur
 e and evolution - Dan Spencer ( University of Oxford)
DTSTART:20201015T103000Z
DTEND:20201015T113000Z
UID:TALK151795@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Global volcanism has dominated the evolution of many worlds fr
 om the early Earth at the time when life emerged\, to potentially habitabl
 e ocean worlds like Enceladus. By affecting large proportions of planetary
  interiors\, far below the surface expressions that we observe\, planetary
  volcanism leads to thermal\, structural\, and chemical evolution\, and in
  the case of the Earth\, has facilitated life. Io is an extreme 'end-membe
 r' that allows us to study planetary volcanism in relative isolation from 
 other processes. A complete picture of planetary volcanism requires an inv
 estigation of volcanic systems in the crust together with magmatic process
 es in the underlying mantle that fuel them. This is a significant challeng
 e because crustal volcanic systems evolve on much shorter timescales than 
 planetary mantles\, which has led previous works to focus on each domain s
 eparately. I develop a new parametrisation for the rapid\, complex process
 es of volcanic systems that allow them to be investigated alongside much s
 lower mantle processes. With this approach I propose: a) the formation of 
 magmatic intrusions is a fundamental part of Io's crustal heat balance\, a
 nd controls the crustal thickness\; b) magmatism and volcanism leads to a 
 stratification in Io's mantle\, predicting the formation of ultra-high-tem
 perature lava at depth\; c) Io's long-wavelength topography and crustal th
 ickness variations can be used to infer the underlying tidal heating distr
 ibution.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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