DI017
Thermochemical Nature of the Mantle Transition Zone
Session ID#: 76403
Session Description:
The mantle transition zone acts as a gatekeeper of heat and material exchange between the upper and lower mantle. The unique thermochemical nature of the region surrounding the mantle transition zone is manifested by observed seismic anomalies, major and trace element composition of xenoliths and ultradeep diamonds, kinks in the melting curves of volatile-rich rocks, and phase transitions of peridotites and eclogites. A combination of these factors can impede material transfer between the upper and the lower mantle with significant consequences for the global thermal and volatile cycles.
This session invites submissions from a broad range of studies of the transition zone, including, but not limited to: seismic observation of regional or global anomalies; petrological studies ; mineral and rock physics studies; geochemical evidence of volatile/trace element exchange; geodynamic simulations of mantle transition zones; and natural observations from mantle xenoliths.
Co-Organized:
Index Terms:
1038 Mantle processes [GEOCHEMISTRY]
3924 High-pressure behavior [MINERAL PHYSICS]
5102 Acoustic properties [PHYSICAL PROPERTIES OF ROCKS]
7208 Mantle [SEISMOLOGY]
Primary Convener: Saswata Hier-Majumder, Royal Holloway University of London, Egham, United Kingdom
Conveners: Catherine Rychert, University of Southampton, Ocean and Earth Science, Southampton, United Kingdom, Maxim Ballmer, ETH Zürich, Department of Earth Sciences, Zürich, Switzerland and Michael J Walter, University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom
Primary Liaison: Saswata Hier-Majumder, University of Maryland, College Park, MD, United States
Single Station Receiver Function Analysis of the Mantle Transition Zone Beneath Bermuda (499066)
Alexander Burky1, Jessica C E Irving2 and Frederik Simons1, (1)Princeton University, Princeton, NJ, United States, (2)Princeton University, Department of Geosciences, Princeton, NJ, United States
Discovery of hydrous phase B as inclusion in a diamond (503069)
Oliver D Tschauner1, Shichun Huang1, Sandro Jahn2, Wenjun Liu3 and Vitali B Prakapenka4, (1)University of Nevada Las Vegas, Las Vegas, NV, United States, (2)Deutsches GeoForschungsZentrum, Potsdam, Germany, (3)Argonne National Laboratory, Advanced Photon Source, Argonne, IL, United States, (4)University of Chicago, Center for Advanced Radiation Sources, Chicago, IL, United States
Thermal and chemical properties of the global mantle transition zone from PP and SS precursors (511717)
Chunquan Yu, Southern University of Science and Technology, Department of Earth and Space Sciences, Shenzhen, China, Saskia D B Goes, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, Elizabeth A Day, Imperial College London, Earth Science and Engineering, London, United Kingdom and Robert D van der Hilst, Massachusetts Institute of Technology, Cambridge, United States
Seismic observations of ponding plumes beneath the mantle transition zone (Invited) (513988)
Lauren Waszek, New Mexico State University Main Campus, Las Cruces, NM, United States, Benoit Tauzin, Laboratoire de Sciences de la Terre, Université de Lyon I, CNRS and Ecole Normale Supérieure de Lyon, UMR5570, Villeurbanne, France, Nicholas C Schmerr, University of Maryland College Park, Geology, College Park, MD, United States, Maxim Ballmer, ETH Zürich, Department of Earth Sciences, Zürich, Switzerland and Juan Carlos Afonso, Macquarie University, Sydney, NSW, Australia
Melting above the mantle transition zone beneath the Pacific margins (516016)
Yizhuo SUN, Royal Holloway University of London, Egham, TW20, United Kingdom, YIgang Xu, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China, Benoit Tauzin, Laboratoire de Sciences de la Terre, Université de Lyon I, CNRS and Ecole Normale Supérieure de Lyon, UMR5570, Villeurbanne, France, Michael J Walter, Carnegie Institution for Science, Geophysical Laboratory, Washington, DC, United States, Maxim Ballmer, ETH Zürich, Department of Earth Sciences, Zürich, Switzerland and Saswata Hier-Majumder, Royal Holloway University of London, Egham, United Kingdom
Deep mantle melting, global water circulation and the stability of the ocean mass (519248)
Shun-ichiro Karato1, Bijaya B Karki2 and Jeffrey J Park1, (1)Yale University, Geology & Geophysics, New Haven, CT, United States, (2)Louisiana State University, Department of Computer Science, Department of Geology & Geophysics, Center for Computation and Technology, Baton Rouge, LA, United States
Intermediate- and small-scale topography of mantle discontinuities and implications for mantle convection (562653)
Sidao Ni, USTC University of Science and Technology of China, Hefei, China, Han Zhang, University of New Mexico, Albuquerque, United States, Yong Zhou, Institute of Geodesy & Geophysics, Hubei, China, Wenbo Wu, CalTech Seismological Laboratory, Pasadena, United States and Jessica C E Irving, Princeton University, Department of Geosciences, Princeton, NJ, United States
NoLiMit: Software and Physics-Based Catalogs of Seismic Waveforms for Analyses of the Earth’s Mantle Transition Zone (576381)
Benoit Tauzin1,2, Lauren Waszek2,3, Juan Carlos Afonso4,5, Malcolm Sambridge2, Hrvoje Tkalcic2, Thomas Bodin6 and Eric Debayle6, (1)Université de Lyon, UCBL, ENSL, CNRS, LGL-TPE, Villeurbanne Cedex, France, (2)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (3)New Mexico State University, Las Cruces, NM, United States, (4)Macquarie University, Sydney, NSW, Australia, (5)Centre for Earth Evolution and Dynamics, University of Oslo, Oslo, Norway, (6)Université de Lyon, UCBL, ENSL, CNRS, LGL-TPE, Villeurbanne, France
