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| DI02: | Seismic Anisotropy and Mantle Dynamics - Observations and Modeling |
| Sponsor: |
Study of Earth's Deep Interior
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| CoSponsor: |
Mineral and Rock Physics Seismology Tectonophysics Volcanology, Geochemistry, and Petrology |
| Convener: |
Thorsten W. Becker University of Southern California USA twb@usc.edu Mark P. Panning Princeton University USA mpanning@princeton.edu |
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3902 5120 7208 8120 8162 .
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| Description: | Seismically anisotropic structure from the uppermost mantle to the core provides one of the best potential constraints for linking large-scale observations to geodynamic flow modeling through microscopic mineral physics experiments and theory. Recent years have seen detailed models of azimuthal and radial anisotropy, for example, which have been interpreted for plate and subduction dynamics. However, numerous issues remain, some decades old, including: the detailed depth distribution of anisotropic anomaly power throughout the upper mantle, the links with electrical and rheological anisotropy, the origin and length-scale of lowermost mantle anisotropy, the role of composition, volatiles, temperature and pressure in anisotropic texture development, the partitioning of frozen-in versus convection-generated anomalies, and the resolving power of current seismological datasets. In this session, we invite contributions from seismology, geodynamics, electro-magnetic and xenolith studies, rock mechanics and mineral physics to explore the frontiers of observations and modeling of mantle anisotropy. In particular, studies that explicitly examine the connections between observations of anisotropy and the dynamic processes in the mantle are strongly encouraged. We wish to identify current challenges in discussion (e.g. are we modeling or data limited?), and jointly formulate strategies for the next years to turn seismic anisotropy into a truly quantitative constraint on mantle dynamics. |
Union Sessions by Theme
There are no extra requirements to submit to these sessions.
1. Carbon in the Earth System
U01: Origin of Late Holocene (Pre-Industrial) Increases in Atmospheric CO2 and CH4U04: Understanding of the Global Carbon Cycle Using Models and ObservationsU15: Global Climate Change and Gas Hydrate Reservoir Degassing: Assessing the Scientific EvidenceU22: Geologic Carbon Sequestration: The Vital Links Between Risk Assessment, Monitoring and Mitigation Design
2. Earth's Polar Regions
U02: The International Polar YearU23: Observing, Understanding, Predicting and Responding to Pan-Arctic Ice Retreat Problems
3. Climate & the Environment
U06: Geoengineering to Counteract Global Warming?U10: Tropical Cyclone—Climate Interactions Past, Present, and FutureU11: Comparative Climate Studies of Earth, Venus and MarsU12: Consequences of Peak Oil for Climate ChangeU14: Environmental Consequences of the Changing Global Food SystemU24: Perspectives on the Past and Future of Paleoceanography and Paleclimatology
4. Earth's Dynamic Interior
U09: Different Views on One AsthenosphereU18: Interaction and Co-evolution of Earth Reservoirs: Coupling of Mantle, Tectonic, Atmospheric, and Hydrospheric Dynamics in the Evolution of EarthU20: Fluids at Convergent Margins: Synthesis of Observations, Experiments and ModelsU21: Geologic, Seismologic, and Geodynamic Constraints on the 4–D Evolution of North America: Where are we now and Where are we going?
5. New Frontiers
U03: MESSENGER at Mercury: The Second FlybyU05: Episodic Tremor and Slip: Insights into a Newly Discovered ProcessU08: The Library — Data Center Alliance in Earth and Space SciencesU13: The Phoenix MissionU16: The Van Allen Radiation Belts and Their Impact on Modern Space Science
6. Hazards and Public Risk
U07: Role of Science in Water, Biologic, and Geologic Hazards SecurityU17: Decision Support Needs and Tools for Global Change: Bridging the Gap Between Physical and Societal ModelsU19: The Great 2008 Wenchuan Earthquake: A Multi-disciplinary ViewU25: Integrated Geohazards Along Continental Margins and Plate Boundary Zones