DI41A:
History and Evolution of the Lowermost Mantle: Constraints from Multiple Disciplines I Posters

Submit an Abstract to this Session



Session ID#: 22896

Session Description:
The Earth's lowermost mantle poses many questions whose answers are critical for understanding Earth history and dynamics. Some outstanding problems include: the origin and makeup of the large low-shear-velocity provinces (LLSVPs) and ultra-low-velocity zones (ULVZs); the presence of phase transitions and effect of elemental disproportionation or fractionation; the extent of any chemical or dynamic interaction with the outer core; its behavior as a boundary layer and potential control on mantle convection, and as a possible source of deep mantle plume; and the presence of subducted materials. Addressing these questions requires synergies of multiple disciplines. The focus of this session is on better constraining the structure, composition and dynamics of the lowermost mantle to understand Earth evolution and dynamics. We call for observational, modeling, and experimental contributions in all disciplines, including but not limited to seismology, mineral physics, geochemistry, and geodynamics.
Primary Convener:  Shuai Zhang, Lawrence Livermore National Laboratory, Livermore, CA, United States
Conveners:  Andy Nowacki, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Kaiqing Yuan, University of California Berkeley, Berkeley, CA, United States and Xi Liu, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States
Chairs:  Andy Nowacki, University of Leeds, Leeds, LS2, United Kingdom, Shuai Zhang, Lawrence Livermore National Laboratory, Livermore, CA, United States, Kaiqing Yuan, University of California Berkeley, Berkeley, CA, United States and Xi Liu, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States
OSPA Liaison:  Andy Nowacki, University of Leeds, Leeds, LS2, United Kingdom
Index Terms:

1038 Mantle processes [GEOCHEMISTRY]
1042 Mineral and crystal chemistry [GEOCHEMISTRY]
3924 High-pressure behavior [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]

Abstracts Submitted to this Session:

Iron Isotopic Fractionation in Earth’s Lower Mantle (236144)
Hong Yang1, Jung-Fu Lin2,3, Michael Y. Hu4, Wenli Bi4, Jiyong Zhao5, Esen Ercan Alp6, Mathieu Roskosz7, Nicolas Dauphas8 and Takuo Okuchi9, (1)Stanford University, Earth and Planetary Sciences, Stanford, United States, (2)University of Texas at Austin, Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States, (3)Center for High Pressure Science and Technology Advanced Research(HPSTAR), Shanghai, China, (4)Advanced Photon Source, Argonne National Laboratory, Argonne, IL, United States, (5)Advanced Photon Source, Lemont, United States, (6)Argonne National Laboratory, Argonne, IL, United States, (7)MNHN National Museum of Natural History Paris, Paris, France, (8)University of Chicago, Origins Laboratory, Department of the Geophysical Sciences and Enrico Fermi Institute, Chicago, IL, United States, (9)Institute for Planetary Materials, Okayama University, Misasa, Tottori, Japan
Experimental deformation of (Mg,Fe)O ferropericlase in a resistive-heated DAC at conditions of the Earth’s lower mantle (254174)
Julia Immoor1, Hauke Marquardt1, Lowell M Miyagi2, Feng Lin3, Sergio Speziale4, Sebastien Merkel5 and Hans-Peter Liermann6, (1)Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, (2)University of Utah, Department of Geology and Geophysics, Salt Lake City, UT, United States, (3)University of Utah, Department of Geology and Geophysics, Salt Lake City, United States, (4)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (5)CNRS / Université de Lille, Villeneuve D'Ascq, France, (6)Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
Monte Carlo Models to Constrain Temperature Variation in the Lowermost Mantle (219954)
Andrew Walker, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, Prof. Christopher J Davies, University of Leeds, School of Earth and Environment,, Leeds, United Kingdom and Andy Nowacki, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom
Melting and Its Influence on the Long-term Evolution of the Lower Mantle Heterogeneities (LLSVP and ULVZ) (259646)
Ilya Fomin, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland and Paul J Tackley, ETH Zurich, Department of Earth and Planetary Sciences, Zürich, Switzerland
Long-Lived Mantle Plumes Sample Multiple Deep Mantle Geochemical Domains: The Example of the Hawaiian-Emperor Chain (294139)
Lauren Harrison, EOAS University of British Columbia, Vancouver, BC, Canada and Dominique Weis, University of British Columbia, PCIGR, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada
Seismic Attenuation in the African LLSVP Estimated from PcS Phases (262112)
Chujie Liu, University of Missouri Columbia, Department of Geological Sciences, Columbia, United States and Steve Grand, University of Texas at Austin, Department of Geological Sciences, Austin, United States

See more of: Study of Earth's Deep Interior