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SUMMARY:Influence of mantle melting on cooling and volatile cycling - Pete
 r Driscoll (Carnegie Institution for Science)
DTSTART:20160217T113000Z
DTEND:20160217T123000Z
UID:TALK64716@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Heat lost by melt eruption at the surface is a minor component
  of Earth&rsquo\;s internal heat budget and normally discarded from therma
 l history models.  However\, the strong temperature dependence of global m
 elt production implies that an earlier\, hotter Earth produced more melt\,
  increasing internal heat loss via eruptive cooling.  To address this we d
 evelop simple models for mantle melt production and eruptive cooling\, and
  derive melt heat loss scaling laws.  Including a melt heat sink in therma
 l history models results in more efficient mantle cooling\, exacerbating t
 he thermal catastrophe of the mantle\, which can be overcome by adjustment
 s to the present-day energy balance.  In application to stagnant lid plane
 ts\, cooling by melt eruption can compensate for slow conductive cooling b
 ut is dependent on the fraction of extrusive to intrusive melt.  In the sa
 me vein\, a generalized volatile cycling box-model illustrates how volatil
 e reservoir size depends on melt eruption rates.
LOCATION:Seminar Room 1\, Newton Institute
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