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SUMMARY:Crustal Melting in the Himalaya\, Collision tectonics and the Orig
 in of Granite - Professor Nigel Harris (The Open University)
DTSTART:20151116T170000Z
DTEND:20151116T180000Z
UID:TALK62369@talks.cam.ac.uk
CONTACT:Matouš Ptáček
DESCRIPTION:This seminar will address the significance of crustal melting 
 during prograde metamorphism\, and its place within the complex causal cha
 in of events that ensues during a continental collision: Does melting driv
 e the tectonics\, or do the tectonics cause melting?\n  One way to answer 
 this question is to focus on the location of Miocene granite outcrops foun
 d within the Himalayas\, and attempt to determine their origin\; this can 
 be done using a wide range of evidence\, including Nd isotopes in garnets\
 , which allow very accurate dating of their decompression paths\, and Hf-O
  isotopic data in zircons. Additionally\, models describing dehydration & 
 decompression melting in the crust\, and the rheological consequences of c
 rustal anatexis\, can be constructed. Proceeding to ground such models in 
 geochemical observations\, one can attempt the further study of regional-s
 cale dynamics during a continental collision in an integrated framework th
 at considers both the brittle and ductile behaviours of rock\, as well as 
 the transitions between these two schemes. Finally\, the roles of channel 
 flow\, the monsoon\, and erosion across the Himalayas shall also be consid
 ered.
LOCATION:Harker Room 1\, Department of Earth Sciences
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