DI008:
History and Evolution of the Lowermost Mantle: Constraints from Multiple Disciplines





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
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:

Riccardo Reali1, Jennifer M Jackson2, James A Van Orman3, Philippe Carrez1 and Patrick Cordier1, (1)University of Lille 1, Villeneuve d'Ascq, France, (2)California Institute of Technology, Pasadena, CA, United States, (3)Case Western Reserve University, Cleveland, OH, United States
Andrew Walker, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, 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
Hong Yang1, Jung-Fu Lin1,2, Michael Y. Hu3, Wenli Bi3, Jiyong Zhao3, Esen Ercan Alp4, Mathieu Roskosz5, Nicolas Dauphas6 and Takuo Okuchi7, (1)Center for High Pressure Science and Technology Advanced Research(HPSTAR), Shanghai, China, (2)University of Texas at Austin, Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States, (3)Advanced Photon Source, Argonne National Laboratory, Argonne, IL, United States, (4)Argonne National Laboratory, Argonne, IL, United States, (5)MNHN National Museum of Natural History Paris, Paris, France, (6)University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States, (7)Institute for Planetary Materials, Okayama University, Misasa, Tottori, Japan
Masayuki Obayashi, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Fenglin Niu, China University of Petroleum, Beijing, China and Junko Yoshimitsu, JAMSTEC, Yokosuka, Japan
Julia Immoor1, Hauke Marquardt1, Lowell M Miyagi2, Feng Lin2, Sergio Speziale3, Sebastien Merkel4 and Hans-Peter Liermann5, (1)Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, (2)University of Utah, Salt Lake City, UT, United States, (3)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany, (4)CNRS / Université de Lille, Villeneuve D'Ascq, France, (5)DESY, HASYLAB, PETRA III, P02, Hamburg, Germany
Dominique Weis, University of British Columbia, Vancouver, BC, Canada and Lauren Harrison, EOAS University of British Columbia, Vancouver, BC, Canada
Ilya Fomin, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland and Paul J Tackley, ETH Zurich, Department of Earth Sciences, Zurich, Switzerland
Chujie Liu and Steve Grand, University of Texas at Austin, Austin, TX, United States
Vasilije Dobrosavljevic, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States and Jennifer M Jackson, California Institute of Technology, Pasadena, CA, United States
John W Hernlund, Earth-Life Science Institute, Meguro-ku, Tokyo, Japan
Jana Schierjott1, Kar Wai Cheng1, Antoine Rozel2 and Paul J Tackley2, (1)ETH Zurich Department of Earth Sciences, Zurich, Switzerland, (2)ETH Zurich, Department of Earth Sciences, Zurich, Switzerland
Christine T Houser1, John W Hernlund1 and Juan Jose Valencia-Cardona2, (1)Earth-Life Science Institute, Meguro, Tokyo, Japan, (2)University of Minnesota Twin Cities, Minneapolis, MN, United States
Matthew Price, Huw Davies and James Panton, Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom
Harriet C. P. Lau, Harvard University, Cambridge, MA, United States, Jerry X Mitrovica, Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States, James L Davis, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Jeroen Tromp, Princeton University, Princeton, NJ, United States, Hsin-Ying Yang, NTU National Taiwan University, Taipei, Taiwan and David Al-Attar, University of Cambridge, Bullard Labs, Cambridge, United Kingdom
Jack Walpole1, James M Wookey2, Andy Nowacki1, Andrew Walker1, J Michael Kendall1, Guy Masters3 and Alessandro M Forte4, (1)University of Bristol, Bristol, United Kingdom, (2)University of Bristol, Bristol, BS8, United Kingdom, (3)UCSD Scripps Inst Oceanography, La Jolla, CA, United States, (4)University of Florida, Gainesville, FL, United States
Lauren Harrison and Dominique Weis, University of British Columbia, Vancouver, BC, Canada