BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Contoversy in action: Continental Collisions as sites of Crustal G
 rowth - Prof. Yaoling Niu - Durham
DTSTART:20100308T170000Z
DTEND:20100308T180000Z
UID:TALK22807@talks.cam.ac.uk
CONTACT:Samantha Simic
DESCRIPTION:Zones of continental collision\, NOT active subduction\, are p
 rimary sites of net continental crustal growth.\n\nDue to similar geochemi
 stry\, it has been widely believed for 40 years that continental crust ori
 ginated from and is constantly produced in volcanic island arc settings.\n
 By linking elements that are missing from the continental crust (but are h
 osted in MORB mantle) with the petrogenesis and geochemistry of syncollisi
 onal granitoids and related volcanic rocks in southern Tibet\, Yaoling can
  convince you that\, whereas the standard “island arc” model has many 
 more difficulties than certainties\, it is the continental collision (vs. 
 "island arc magmatism") that produces and preserves the juvenile crust\, a
 nd hence maintains net continental growth.\n\nThis is an abstract summary.
  For the full abstract\, please e-mail sks38@cam.ac.uk.
LOCATION:Harker Room 1\, Department of Earth Sciences
END:VEVENT
END:VCALENDAR