[unav_all] AGU Session V017: Geodynamics of the Yellowstone Hotspot and its Track, the Snake River Plain Volcanic Field

Meghan Miller meghan at unavco.org
Sun Jul 15 21:34:44 MDT 2012

Dear Colleagues,

We are pleased to announce “Session V017: Geodynamics of the Yellowstone Hotspot and its Track, the Snake River Plain Volcanic Field” at the 2012 American Geophysical Union Fall Meeting in San Francisco, California.

This interdisciplinary symposium, hosted by the seismology, tectonophysics, volcanology-geochemistry-petrology, and geodesy sections, focuses on understanding the origin of the voluminous Quaternary basalt-rhyolite Snake River Plain volcanic fields, their relationship to the Yellowstone hotspot and dynamics and kinematics of plume-plate interaction.

This symposium is prompted by: (1) the recent acquisition of new geophysical data from the YSRP that address key topics including crust-mantle structure from seismic data of the EarthScope TArray and electrical structure from Earthscope MT data; (2) new geochemical and isotopic data obtained from 3 new deep drill holes obtained by the “Project Hotspot” and the International Continental Drilling Program in the Snake River Plain that will provide detailed information on the composition, geochemistry and magmatic processes of the SRP and how they relate to the Yellowstone hotspot; (3) new earthquake data at Yellowstone from the recently upgraded seismic network reveal complex earthquake triggering, swarm nucleation and fault-volcanic interaction; and (4) new EarthScope PBO GPS and borehole strainmeter arrays in Yellowstone provide high time and spatially variable ground deformation of high rates of uplift and relaxation subsidence attributed to crustal magma migration superimposed on regional EW extension of the Yellowstone Plateau.

Taken together the combined data provides integrated models of mantle magmatic interaction with the overriding lithosphere and modification of crust by related volcanic and tectonic processes. Moreover these data address the debatable question is the Yellowstone hotspot plume-generated or edge effect volcanism and how has the hotspot had a profound effect on the broader Late Cenozoic evolution of the western U.S.

Please consider having your members submitting an abstract for this session. Check the meeting website for updates, and complete submission policies:http://fallmeeting.agu.org

Note – the deadline for abstracts is 8 August 2012, so plan accordingly and submit your abstract soon. The first author must be an AGU member or sponsored by a member.

This session will be scheduled by AGU as either oral or poster or both, depending on the number and quality of the abstracts submitted.  Authors will be informed in September regarding the date and format (oral or poster) of their paper.


Robert Smith,  University of Utah


John Shervais, Utah State University
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