Please see below for sessions of interest to the GeoPRISMS Community, taking place at the 2020 AGU Fall Meeting, December 7-11. Note that AGU Fall Meeting will be mostly virtual.
AGU abstract submission is now open until July 29.
https://www.agu.org/fall-meeting
Submit your abstract: https://www.agu.org/Fall-Meeting/2020/Present/Abstracts
T002 | Advances in Understanding Continental Margin Evolution: Two Decades of GeoPRISMS and MARGINS Science
T011 | From trench to back-arc: Dynamics of the Hikurangi subduction zone
T012 | Geophysical, Mechanical, and Geologic Constraints on the Subduction Interface
Email us at info@geoprisms.nineplanetsllc.com to include your session to the list.
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T002 | Advances in Understanding Continental Margin Evolution: Two Decades of GeoPRISMS and MARGINS Science
https://agu.confex.com/agu/fm20/prelim.cgi/Session/103961
Conveners: Jennifer A Wade (National Science Foundation), Demian M Saffer (Pennsylvania State University), Katherine A Kelley (University of Rhode Island), Harm J Van Avendonk (University of Texas at Austin)
Over the past two decades, the GeoPRISMS and MARGINS programs have brought together a vibrant community of geoscientists to conduct computational, laboratory, and large scale field experiments that span the shorelines of continental margins. These interdisciplinary investigations aim to understand Earth’s most active tectonic, mass transfer, and sedimentary systems, and have yielded new insights into processes that underlie both active and passive margin evolution, and major geohazards that affect population centers, including large earthquakes, volcanic eruptions, tsunamis, and landslides. In this session, we invite presentations that contribute to advancing and integrating the research efforts of these two decadal programs and their associated communities, including research at focus/primary sites, allied thematic studies, and particularly work that uses large and diverse datasets to synthesize geophysical, geochemical, numerical, and/or experimental investigations to illuminate and quantify fundamental processes that control deformation and mass flux at active subduction zones, continental rift systems, and passive margins.
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T011 | From trench to back-arc: Dynamics of the Hikurangi subduction zone
https://agu.confex.com/agu/fm20/prelim.cgi/Session/102769
Conveners: Christine Chesley (Lamont -Doherty Earth Observatory), Laura Wallace (GNS Science-Institute of Geological and Nuclear Sciences Ltd, University of Texas), Andrew Gase (University of Texas), and Geoff Kilgour (GNS Science-Institute of Geological and Nuclear Sciences Ltd)
The Hikurangi subduction zone off New Zealand’s North Island exhibits intriguing variations in volcanic, tectonic, and megathrust slip processes making it an outstanding natural laboratory to probe these processes. With support from NSF, IODP, GeoPRISMS, and numerous New Zealand and international agencies, many geophysical, geological, and geochemical studies have recently been carried out to investigate the interplay of these variations, especially as they relate to plate boundary tectonics and the diverse controls on volcanism. We welcome submissions that improve our understanding of the Hikurangi subduction system, including the role of fluids, volatiles, and sediments in subduction and volcanic processes, factors controlling megathrust earthquakes and slow slip events, offshore gas hydrates and slope instability, the generation and transport of magma, and comparative studies from other subduction margins. We encourage a diversity of methods for addressing these topics, such as electromagnetism, seismology, geodesy, gravity, numerical modeling, scientific drilling, petrology, and structural geology.
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T012 | Geophysical, Mechanical, and Geologic Constraints on the Subduction Interface
https://agu.confex.com/agu/fm20/prelim.cgi/Session/104013
Conveners: Helen A Janiszewski (University of Hawaii at Manoa), Cailey Brown Condit (University of Washington), Noel M Bartlow (University of California Berkeley), Melodie E French (Rice University)
Our understanding of subduction interface slip behavior and structure comes from integration of geophysical imaging, experimental studies, and observations from the rock record. The rheology and structure of the plate interface are essential components influencing slip behavior of the subduction plate boundary. Interpretation of geophysical observations at these zones is inherently dependent on fundamental rock properties; likewise understanding of the deformation of these materials depends on experimental and geologic studies, and numerical modeling. In this session, we aim to engage an interdisciplinary research community, drawing from seismology, magnetotellurics, rock mechanics, geodesy, and geology, focused on constraining the structure and slip properties along the subduction plate interface. Work extending from the trench, across the seismogenic zone to the locations of deep episodic tremor and slip are encouraged. We will highlight research results from the past decade of GeoPRISMS focus sites, Cascadia, Alaska/Aleutians, and Hikurangi, but welcome submissions outside of these areas.