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SUMMARY:Thermal convection in an heterogeneous mantle: plumes\, piles\, do
 mes\, and LLSVPs. - Anne  Davaille (CNRS (Centre national de la recherche 
 scientifique)\; Université Paris Saclay)
DTSTART:20160218T090000Z
DTEND:20160218T100000Z
UID:TALK64718@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Planetary long-term cooling\, as well as surface phenomena suc
 h as plate  tectonics\, volcanoes and earthquakes\, are mainly controlled 
 by the existence and  patterns of convective motions in the solid-state ma
 ntle. The morphology and  characteristics of convective patterns strongly 
 depends on the mantle physical  properties and the existence of density he
 terogeneities. <br> <span><br>I shall review how the interplay of the latt
 er with thermal convection  produces mantle instabilities of widely varyin
 g morphology and time-dependence\,  according to the magnitude of the dens
 ity anomalies and the type of mantle  rheology. They could therefore expla
 in the diversity of hot spot volcanism  observed on Earth\, as well as the
  mantle structures revealed by seismic  tomography.&nbsp\;</span>
LOCATION:Seminar Room 1\, Newton Institute
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