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SUMMARY:Erebus volcano: from mantle to atmosphere - Clive Oppenheimer\, De
 partment of Geography\, University of Cambridge
DTSTART:20120320T153000Z
DTEND:20120320T163000Z
UID:TALK36435@talks.cam.ac.uk
CONTACT:Dr. Ailsa Benton
DESCRIPTION:Erebus is well-known for its sustained lava lake\, alkaline in
 traplate character\, and\, of course\, its southerly latitude. The volcano
  displays two kinds of behaviour: (i) lava lake\, and (ii) lava lake plus 
 intermittent Strombolian eruptions. Thanks to a combination of petrologica
 l\, geochemical and geophysical studies\, we are building a conceptual mod
 el for the plumbing system of Erebus – from the deep supply from the man
 tle to the evolved phonolite lava lake. On one level\, the behaviour is si
 mple\, stable and sustained but the magma differentiation\, mantle-to-surf
 ace degassing\, conduit geometry\, and moderate viscosity of the phonoliti
 c magma superimpose fascinating complexity on the long-lived lava lake. I 
 will highlight what we have been doing on Erebus over the past decade\, an
 d summarise where we have reached in our understanding of the volcano’s 
 behaviour. I will touch briefly on the atmospheric chemistry of the Erebus
  gas/aerosol plume\, including its effect on ozone.   
LOCATION:room 187\, British Antarctic Survey\, High Cross\, Cambridge\, CB
 3 0ET
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