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SUMMARY:Unlocking the secrets of melt inclusions at Kilauea Volcano - Mari
 e Edmonds
DTSTART:20130611T153000Z
DTEND:20130611T163000Z
UID:TALK45419@talks.cam.ac.uk
CONTACT:Yves Moussallam
DESCRIPTION:Melt inclusions from 25 eruptions of Kilauea Volcano over the 
 last 600 years highlight the important processes of fractionation\, mixing
  and degassing prior to eruption. The sampled eruptions span a large range
  of styles\, ranging from effusive through to transient explosive and foun
 taining. The data show that there is a statistical difference in the geoch
 emistry between the different styles\, and through different time periods 
 at Kilauea\, suggesting that the explosivity of melts might be "set" right
  from the point of separation from the mantle source. We look at one fount
 aining eruption in detail (the 1959 Kilauea Iki eruption) to investigate h
 ow fountains are triggered. Inputs of hot\, primitive\, gas-rich melts mix
  with cooler\, stored melts\, causing rapid vesiculation\, leading to foun
 tains. Along the way\, we see how melt inclusions are dramatically altered
  by processes such as post-entrapment crystallization and the development 
 of a shrinkage bubble\, illustrating some of the pitfalls of melt inclusio
 n work.
LOCATION:Tilley Lecture Theatre\, Earth Sciences Department
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