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SUMMARY:Magma chamber processes in ferrobasaltic layered intrusions - Oliv
 er Namur
DTSTART:20121016T153000Z
DTEND:20121016T163000Z
UID:TALK38984@talks.cam.ac.uk
CONTACT:John Maclennan
DESCRIPTION:Ferrobasaltic layered intrusions have been extensively studied
  and have contributed to our understanding of how cumulate rocks form and 
 how layering develops. Nevertheless\, some very important questions\, espe
 cially concerning the composition of the liquid having crystallized these 
 intrusions\, still remain unsolved. In this talk\, I will present the var
 ious hypotheses that have been proposed concerning the evolution of silica
 te liquid composition during the differentiation of ferrobasaltic intrusio
 ns. I will then discuss how the physical properties of the liquids affect 
 the crystallization of the magma chambers and control the mineralogical as
 semblages of cumulate rocks. Finally\, I will use the Sept Iles layered in
 trusion (Canada) has an example of ferrobasaltic layered intrusion and dis
 cuss the crystallization and geochemistry of various rocks observed within
  this intrusion.\n\nHunter & Sparks\, 1987. The differentiation of the Ska
 ergaard intrusion. Contributions to Mineralogy and Petrology. 95\, 451-461
 .\nThy\, Lesher\, Tegner\, 2009. The Skaergaard liquid line of descent rev
 isited. Contributions to Mineralogy and Petrology 157\, 735-747.\nNamur\, 
 Charlier\, Toplis\, Higgins\, Liégeois\, Vander Auwera\, 2010. Crystalliz
 ation sequence and magma chamber processes in the ferrobasaltic Sept Iles 
 layered intrusion\, Canada. Journal of Petrology 51\, 1203-1236. 
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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