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Room: 208B

Date: 4/19/2023

Session Time: 8:00 AM to 11:45 AM (local time)

Subduction zones are dynamic tectonic environments that generate destructive natural hazards, produce large orogenic systems, create and modify continental crust, recycle volatiles and sediments into the interior and drive mantle convection. Many of these processes occur at depths of < 120 km, roughly from the oceanic trench to the magmatic arc - a key focus area of the broader Earth Science community as evidenced by community-driven programs such as EarthScope, GeoPRISMS and SZ4D. Our understanding of these processes is predicated on direct observations through increasingly more refined and comprehensive seismic images of the incoming plate, the downgoing slab, the mantle wedge and the overriding plate, which we can use to infer subsurface properties such as rock composition, in situ melt percentage and water content. For this session, we invite contributions from the broadly defined seismic imaging community at the basin scale to the crustal and mantle scale. Seismic imaging techniques can include, but are not limited to tomographic techniques, including refraction, surface wave, teleseismic, full waveform and adjoint tomography, as well as active source reflection imaging, distributed acoustic sensing, noise interferometry, attenuation studies, and scattered wave imaging. In particular, we invite contributions that integrate across scales and across shorelines, jointly interpret multiple techniques and/or focus on improving our interpretation of seismic wavespeeds in the crust and mantle to better understand tectonic processes and geologic structures in subduction zone settings.

Conveners

Daniel E. Portner, Arizona State University (dportner@asu.edu)

Jonathan R. Delph, Purdue University (jdelph@purdue.edu)

Harm Van Avendonk, University of Texas at Austin (harm@ig.utexas.edu)

Lindsay L. Worthington, University of New Mexico (lworthington@unm.edu)  

Oral Presentations