Please see below for more sessions of interest to the GeoPRISMS Community, taking place at the 2016 AGU Fall Meeting, December 12-16 in San Francisco. AGU abstract submission deadline is August 3, 2016
https://fallmeeting.agu.org/
Submit your abstract: http://fallmeeting.agu.org/
Your session is not listed? Email us at info@geoprisms.nineplanetsllc.com and we’ll be happy to include your session to the list.
Full list available at: /meetings/
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S029: Temporal changes of seismic structures in response to a great earthquake
Session ID#: 13258
Temporal changes of the lithospheric structure have been a major topic in Solid earth and stay always challenging to detect small variations of the seismic structure associated to great earthquakes. Associated deformations (uplift or subsidence) are actually not well understood even if several models suggested such as opening or closing cracks, stress loading, changes of water condition in the crust. Moreover, looking at the seismic structures along subduction zones in East Asia, it appears also that these structures can be interpretation as asperities which potential can generate future great events.
The session will focus on geophysical imaging of megathrust subduction zones by using different kind of geophysical data in order to provide information of the lithospheric properties and temporal changes of these regions. We invite oral and poster contributions looking at different megathrust subduction zone and using different approaches as ambient field, controlled sources, seismic tomography, electromagnetism, gravity, GNSS, InSAR.
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T012: Insights on the tectonic evolution of the Salton Trough and northern Gulf of California from recent multidisciplinary studies
Session ID#12952
Oblique motion at the Pacific-North American plate boundary is rifting the continent in the Salton Trough in southern California and northern Mexico, and in the northern Gulf of California. Rapid sedimentation from the Colorado River has influenced the mechanisms of rifting, resulting in large differences from the southern Gulf, which has experienced similar total extension. Rift-related magmatism is localized at the surface but more extensive at depth. Substantial thinning and perhaps complete breakup of the continent have occurred, but seafloor spreading has apparently not initiated. Transform and extensional faults interact in complex patterns, with implications for earthquake hazard. Recent multi-disciplinary studies in both countries have focused on rifting processes and the earthquake hazard of this geologic province. This session invites contributions from all disciplines that address our understanding of the tectonic evolution and the magmatic and deformation processes of this complex and evolving plate boundary.
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T019: Models and Experiments that couple flow and deformation in the shallow crust
Session ID#: 13682
Coupled deformation and fluid flow underlie a wide range of fundamental behaviors and processes in the shallow crust, including rock and sediment strength; mass, heat and volatile fluxes; and the links between these fluxes and subsurface biological communities. Recent advances have the potential to illuminate these fundamental processes through the application and development of coupled models that describe deformation and fluid flow in response to the evolution of the full stress field, in combination with experimental studies that extend established soil mechanics concepts to geologically relevant higher stresses and longer time scales. Examples include pore pressure in subduction zones and sedimentary basins, slope failures, subglacial till deformation and hydrology, pressure and stress interaction around deep-well injection, stress and strain surrounding complex structures, and dynamic fault zone slip processes. We welcome experimental, theoretical, and field-based contributions describing deformation behavior and rheology, and theoretical approaches to illuminating earth behavior.
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T027: Origin, architecture, and dynamics of extensional basins
Session ID#: 12396
This session presents recent advances in our understanding of the formation and evolution of sedimentary basins, from rifts and passive margins to cratonic basins, within which rests more than a hundred million years of geological history. This session will present studies from surface to deep: sedimentology to seismology (and all the disciplines in between). The accumulated sediments, the petrology and chemistry of basaltic rocks and the present day seismic structure of the crust and upper mantle are partial records of this evolving system. In this session we aim to bring together research that generates, models and interprets these various observational constraints. Key open questions include: What factors decide whether break-up takes place? What is the role of mantle plumes and volcanism? How do extensional systems link and record climate changes, erosion and deposition? What causes localization of rifting, segment boundaries, transfer zones, and pull apart basins?
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T040: The Eastern North American Margin: Structure, dynamics, history, and processes
Session ID#: 13764
The Eastern North American Margin (ENAM) is today a passive continental margin, but it records two complete Wilson cycles of supercontinent formation and dispersal, involving fundamental tectonic processes such as subduction, continental rifting, and passive margin evolution. It is a major population center as well as a locus for substantial natural hazards, including intraplate earthquakes and offshore landslides. Extensive data collection in eastern North America has recently been enabled through the EarthScope and GeoPRISMS programs and related efforts. We invite submissions that address all aspects of the structure, dynamics, and history of ENAM across a range of Earth science disciplines.
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V025: Speciation and Redox: A Volatile Relationship
Session ID#: 12980
Dear all,
Please consider submitting an abstract to the session, “Speciation and Redox: A Volatile Relationship”, for this year’s AGU joint meeting in December. The deadline for abstract submission in August 3, 2016. Please share with all interested parties!
The presence of volatile elements in planetary interiors transforms fundamental aspects of petrogenesis, including physical properties of solid source material; silicate melt generation, transport, and storage; and volcanic eruptive style. The complex interplay between volatile speciation and redox state results in a wide range of volatile element behaviors across the solar system and within the Earth. We welcome submissions that explore the relationship between redox and volatile speciation using recent breakthroughs in spectroscopy (e.g., FTIR, Raman, and XANES) and mass spectrometry (e.g., SIMS and laser sampling) to analyze experimental and natural samples. We will discuss the abundance, distribution, speciation, and redox state of volatiles in planetary interiors and volcanic products; and we will examine the far-reaching implications of the relationship between volatile speciation and redox for the evolution of planetary bodies, from their cores to their atmospheres.
Looking forward to seeing you in San Francisco,
Maryjo, Megan, and Erik
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V026: Sulfur (Bio)geodynamic Cycles on Earth and Terrestrial Planets
Session ID#: 13340
Sulfur is exchanged between the Earth’s surface and the mantle via subduction zones, magmatism, volcanic degassing, hydrothermalism, biological sulfate reductions and continental weathering. It also plays important roles in geological processes on other terrestrial planets. Yet, its transport and storage from the oceans and continents into the deep Earth, and secular changes in the mode of S-exchange between different igneous and surficial reservoirs remain discussed. Sulfur behavior is also related to its multiple valence states, implying complex interplays with redox state, and affecting sulfur partitioning between minerals, melts and fluids. This session seeks contributions from geochemistry, petrology, laboratory experiments, and field geology addressing the fate of sulfur in various geodynamic settings on terrestrial planets. We will also address the role of sulfur in the redox evolution and biochemical cycles, volcanic degassing, the distribution of chalcophile elements and ore-deposit formation, and coupling with other key volatiles such as carbon and halogens.
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EP011: Connecting Geodynamics and Surface Processes: Theoretical and Field-Based Approaches
Session ID#: 12254
Understanding the feedbacks between solid-Earth deformation, surface processes and landscape evolution requires a process-based approach that integrates observations and models across all spatial and temporal scales. The Earth’s surface is a dynamic interface that evolves through the influence of tectonic and geomorphic drivers. Changes in tectonic forcings generally have spectacular geomorphological consequences. In turn, processes of surface erosion and transport can alter the near-surface stress field and influence fault evolution, uplift/subsidence patterns and surface heat flow. These mechanisms feed back on topography, and thus on the activity of geomorphic agents. This session sets out to explore current research into coupled problems of geomorphology, surface processes and geodynamics. We welcome contributions utilizing a combination of field, experimental, analytical and numerical approaches.