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SUMMARY:Magmatic flare ups along continental margin arcs: evidence from th
 e Antarctic Peninsula and Patagonia - Teal Riley\, BAS
DTSTART:20170206T173000Z
DTEND:20170206T183000Z
UID:TALK67130@talks.cam.ac.uk
CONTACT:Alex Lipp
DESCRIPTION:An interesting aspect of the evolution of continental magmatic
  arcs is that\, despite continued ocean-plate subduction beneath them\, th
 e production of melts\, the growth of the magmatic systems\, and the assoc
 iated volcanic eruptions are all highly episodic. There is considerable ev
 idence that magmatism in arcs is episodic in space and time at scales rang
 ing from entire arcs to single volcanoes. Long segments of continental arc
 s can simultaneously flare-up with magmatic activity within a ~30 Myr wind
 ow and be followed by lulls in which volumetrically little magma is added 
 to the arc. Magmatic episodicity at typically shorter durations is also we
 ll established at the scale of single magmatic plutonic or volcanic system
 s.\nNew data from the Antarctic Peninsula and the Patagonian Andes will be
  used to demonstrate arc episodicity at a range of scales during the Mesoz
 oic.\n\nI will also provide some background information/images to the logi
 stics of field work in Antarctica.\n\nAll welcome to attend\, free for mem
 bers of the Sedgwick Club\, £2 for non-members. Refreshments provided!
LOCATION:Harker Room 1\, Department of Earth Sciences
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