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Goldschmidt 2016. Geochemical Consequences of Subduction Initiation
From: "Reagan, Mark K" <mark-reagan@xxxxxxxxx>Goldschmidt 2016. Geochemical Consequences of Subduction Initiation
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We would like to bring to your attention to Session 07f: Geochemical Consequences of Subduction Initiation (Keynote:
Tomoaki Morishita) at the upcoming Goldschmidt Conference in Yokohama, Japan, June 26-July 1, 2016.
Subduction initiation
creates unique mantle melting environments involving a rapidly-evolving
geodynamic regime that generates crust with a distinctive geochemical
stratigraphy. Recent exploration of the Izu-Bonin-Mariana
system by drilling, diving, and dredging illustrates one such event,
which led to volcanism on a surprisingly broad scale, produced
extraordinary mantle depletion, and was associated with global-scale
plate reorganization. Ongoing subduction initiation in
the Puysegur ridge-trench area south of New Zealand provides another
perspective on the causes and consequences subduction initiation.
Oceanic fore-arcs may preserve records of magmatic evolution
accompanying subduction initiation. Some ophiolites have lithospheric
sequences akin to those of oceanic fore-arcs, and older subduction
initiation events could be preserved in continental terranes with
ophiolites and ophiolitic slivers. We welcome submissions that address
the temporal and spatial evolution of crust and mantle
related to subduction initiation and the early development of
arc-trench systems. We expect an interdisciplinary session that includes
field- and laboratory based-studies on the local, regional, or global
scale, as well as theoretical and experimental results.
Please consider submitting an abstract to our session. The deadline for abstract submission is February 26, 2016. Abstract submission details are available at http://goldschmidt.info/2016/abstracts.
Conveners:
Mark K. Reagan, Richard J. Arculus, Osamu Ishizuka, Robert J. Stern
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