DI006
Heterogeneity in the Earth’s Mantle: Perspectives from Imaging, Modeling, Geochemistry, and Experiments
Session ID#: 157536
Session Description:
Earth’s solid interior harbors the long-term memory of unending and profound transformations that shape our planet. These include Earth’s accretion and the subsequent formation and evolution of heterogeneous domains through differentiation, facilitated by the rise of plate tectonics. Recent progress in linking geochemistry, geodynamics, seismology, petrology and mineral physics helps characterize heterogeneity across a range of spatial scales. Heterogeneous regions are probed with geochemical and seismological observations such as isotopic ratios in xenoliths and erupted volcanic lavas, or imaged variations in velocity, attenuation, anisotropy and density. Signatures of geochemical heterogeneity sampled from the Earth’s surface imply variations in age or intrinsic properties like temperature or composition of the mantle. Seismological heterogeneity affords geographically uniform constraints on these intrinsic properties in addition to implications for dynamic flow, rheology, grain size or crystal structure. Petrology and mineral physics have improved constraints on chemistry and mineralogy of materials at extreme conditions, permitting geodynamic reconstructions of the origin and long-term preservation of heterogeneities. We invite submissions from all disciplines that employ novel numerical, inversion, experimental and geochemical techniques to explore the nature of mantle heterogeneities and their relation to observables at local, regional and global scales.
Index Terms:
1025 Composition of the mantle [GEOCHEMISTRY]
3621 Mantle processes [MINERALOGY AND PETROLOGY]
7208 Mantle [SEISMOLOGY]
7270 Tomography [SEISMOLOGY]
Primary Convener: Pritwiraj Moulik, Princeton University, Geosciences, Princeton, NJ, United States
Conveners: Matthew G Jackson, University of California Santa Barbara, Earth Science, Santa Barbara, United States, Mingming Li, Arizona State University, Tempe, AZ, United States and Susannah Dorfman, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States
Student/Early Career Convener: Wenyi Zhou, University of New Mexico, Earth & Planetary Sciences, Albuquerque, United States
A Global Veneer of Subducted Materials along the Earth’s Core-Mantle Boundary (1050569)
Samantha Elizabeth Hansen1, Edward Garnero2, Mingming Li2, Sang-Heon Dan Shim2 and Sebastian Rost3, (1)University of Alabama, Geological Sciences Department, Tuscaloosa, United States, (2)Arizona State University, School of Earth and Space Exploration, Tempe, United States, (3)The University of Leeds, Leeds, United Kingdom
Global distribution of the petrological, temperature and water content heterogeneities in the upper mantle transition zone (Invited) (1054020)
Jin Zhang1,2, Wenyi Zhou1, Ming Hao1, Bin Chen3, Ruijia Wang4 and Brandon Schmandt5, (1)University of New Mexico, Earth & Planetary Sciences, Albuquerque, United States, (2)Texas A&M University College Station, Geology & Geophysics, College Station, TX, United States, (3)University of Hawaii at Manoa, Honolulu, HI, United States, (4)University of New Mexico, Earth and Planetary Sciences, Albuquerque, United States, (5)University of New Mexico, Department of Earth and Planetary Sciences, Albuquerque, United States
Imaging mantle plumes in the southern and central Atlantic ocean (1061221)
Barbara A Romanowicz, Institut de Physique du Globe, Paris, France; University of California, Berkeley, Department of Earth and Planetary Science, Berkeley, United States, Federico Daniel Munch, University of California, Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States, Maxwell L Rudolph, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States and Sujoy Mukhopadhyay, University of California Davis, Department of Earth and Planetary Sciences, Davis, United States
The Composition of the Pacific Lithosphere Inferred from Petit-spot Mantle Xenoliths, Japan (1105091)
Selena Galdini1, Natsue Abe2, Naoto Hirano3, Michael C. Jollands4, Othmar Müntener1 and Sebastien Pilet1, (1)University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Mantle Drilling Promotion Office, MarE3, Yokohama, Japan, (3)Tohoku University, Center for NE-Asian Studies, Sendai, Japan, (4)Gemological Institute of America, New York, United States
Ridge basalts with decoupled Hf-Nd isotopes: Evidence for ancient residual lithosphere (1113617)
Vincent J M Salters, NHMFL, Tallahassee, FL, United States, Christoph Beier, University of Helsinki, Department of Geosciences and Geography, Helsinki, Finland, Andreas Stracke, Westfälische Wilhelms-Universität Münster, Institut für Mineralogie, Münster, Germany; University of Münster, Institut für Mineralogie, Münster, Germany, Henry J Dick, Woods Hole Oceanographic Inst, Arlington, MA, United States and Dominic Woelki, National High Magnetic Field Laboratory, Tallahassee, FL, United States
Mapping the mantle transition zone using the coda correlation wavefield (1118523)
Meichen Liu, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Jeroen Ritsema, Univ Michigan, Ann Arbor, MI, United States and Zack Spica, University of Michigan, Ann Arbor, United States
On the origin of small-scale seismic scatters at 660-km depth (1119274)
Wei Mao, California Institute of Technology, Seismological Laboratory, Pasadena, United States, Michael Gurnis, California Institute of Technology, Pasadena, United States and Wenbo Wu, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States; Woods Hole Oceanographic Institution, Woods Hole, United States
Mantle compositional heterogeneity challenged by machine learning analysis of 28 global P- and S-wave tomographic models (1125126)
Moloud Rahimzadeh Bajgiran1, Lorenzo Colli2 and Jonny Wu2, (1)University of Houston, Department of Earth and Atmospheric Sciences, Houston, TX, United States, (2)University of Houston, Department of Earth and Atmospheric Sciences, Houston, United States
Constraining the Olivine Content and Hydration of the 410-km Discontinuity Using Observations from Globally Distributed Dense Seismic Arrays (1129636)
Margaret Elizabeth Glasgow, University of New Mexico, Albuquerque, United States, Han Zhang, Zhejiang University, Hangzhou, China, Brandon Schmandt, University of New Mexico, Department of Earth and Planetary Sciences, Albuquerque, United States, Jin Zhang, University of New Mexico Main Campus, Albuquerque, United States and Wenyi Zhou, University of New Mexico, Earth & Planetary Sciences, Albuquerque, United States
A Multi-Technique Approach for Measuring Melting of Iron-Rich Materials at Deep Earth Conditions (1130557)
Vasilije V Dobrosavljevic1, Dongzhou Zhang2, Wolfgang Sturhahn3, Stella Chariton4, Vitali B Prakapenka5, Jiyong Zhao6, Thomas Toellner7, Olivia Pardo3 and Jennifer M Jackson3, (1)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, (2)University of Hawaii at Manoa, Hawaii Institute of Geophysics and Planetology, Honolulu, United States, (3)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States, (4)University of Chicago, Center for Advanced Radiation Sources, Chicago, United States, (5)The University of Chicago, Center for Advanced Radiation Sources, Chicago, United States, (6)Advanced Photon Source, Argonne National Laboratory, Argonne, United States, (7)Argonne National Laboratory, Advanced Photon Source, Lemont, United States
Regional Tomography of Mantle Plumes by Full Waveform Inversion: Targeting French Polynesia (1134740)
Mathurin Dongmo Wamba1, Frederik J Simons1, Jessica C E Irving2 and Wenjie Lei1, (1)Princeton University, Princeton, NJ, United States, (2)University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom
Investigating How Composition-dependent Rheology Controls the Lateral Spatial Stability of LLSVPs in the Lower Mantle (1135068)
Jiaxin Zhang, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States and Allen K McNamara, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States
The Significance of Recycled Oceanic Mantle Lithosphere beneath the Arctic Gakkel Ridge (1136238)
Alexandra Yang Yang, GIG Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China, Charles H Langmuir, Harvard Univ, Earth and Planetary Sciences, Cambridge, MA, United States and Peter J Michael, University of Tulsa, Geosciences, Tulsa, OK, United States
Compositional heterogeneities in the mid-mantle associated with geodynamical flow patterns (1137165)
Lauren Waszek, James Cook University, Physical Sciences Group, Minneapolis, MN, United States, Benoit Tauzin, Australian National University, Research School of Earth Sciences, Canberra, Australia, Nicholas C Schmerr, University of Maryland, College Park, United States and Maxim Ballmer, UCL, Dept. of Earth Sciences, London, United Kingdom
Localized Upper Mantle Low-viscosity Pockets Beneath Intraplate Volcanoes (1140629)
Jung-Hun Song, Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), Seongryong Kim, Korea University, Department of Earth and Environmental Sciences, Seoul, South Korea and Junkee Rhie, Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea
Recycled basaltic material in mantle plumes explains the appearance of the X-discontinuity in the upper mantle beneath the Hawaiian hotspot: 2D geodynamic numerical models (1143586)
Martina Monaco1, Juliane Dannberg1, Rene Gassmoeller1 and Stephen Pugh2, (1)University of Florida, Department of Geological Sciences, Gainesville, United States, (2)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
Modeling Earth’s mantle evolution using olivine and bridgmanite grain growth parameters (1143930)
Jyotirmoy Paul1, Gregor Golabek1, Antoine Rozel2, Paul Tackley2, Tomoo Katsura1 and Hongzhan Fei1, (1)University of Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (2)ETH Zürich, Department of Earth Sciences, Zürich, Switzerland
Global Transition-Zone Topography and Elastic Properties From Normal-Mode Tomography and Their Implications for Compositional Heterogeneity (1145781)
Runa van Tent1, Ashim Rijal1, Lars Gebraad2, Laura J Cobden1, Lauren Waszek3, Andreas Fichtner2 and Arwen Deuss1, (1)Utrecht University, Utrecht, Netherlands, (2)ETH Zurich, Department of Earth Sciences, Institute of Geophysics, Zurich, Switzerland, (3)James Cook University, Physical Sciences, Douglas, Australia
Microstructures and Shear Wave Anisotropy in Stishovite: Implications for Mid-Mantle Seismic Heterogeneities (1148781)
Carmen Sanchez-Valle1, Matthias Krug1, Estelle Ledoux2, Melissa Achorner3, Jeffrey Gay2, Julien Chantel4, Ilya Kupenko1, Nathalie Balfan-Casanova5, Federica Rochira6, Anna Pakhomova7, Hans-Peter Liermann7 and Sebastien Merkel8, (1)University of Münster, Institute for Mineralogy, Münster, Germany, (2)Univ. Lille, UMET - CNRS, Lille, France, (3)University of Münster, Intitute for Mineralogy, Münster, Germany, (4)Univ. Lille, F-59000, Lille, France, (5)University Blaise Pascal Clermont-Ferrand II, Laboratoire Magmas et Volcans, Clermont-Ferrand, France, (6)University of Münster, Institute of Geophysics, Münster, Germany, (7)DESY Deutsches Elektronen Synchrotron, Hamburg, Germany, (8)UMET, Université de Lille, Villeneuve d'Ascq, France
Is there a pyrolitic lower mantle transition zone? (1157597)
Yajie Zhao1, Zhongqing Wu1, Shangqin Hao1,2, Wenzhong Wang1,3, Xin Deng1 and Jian Song1, (1)University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, (2)University of California San Diego, La Jolla, CA, United States, (3)Carnegie Institution for Science, Earth and Planets Laboratory, Washington, DC, United States
A Probabilistic Model of Mantle Transition Zone Discontinuities from Auto-picked Precursor Data (1162107)
Anna Teurman, Gustavus Adolphus College, Saint Peter, United States, Scott Burdick, Wayne State University, Geology Department, Detroit, United States and Lauren Waszek, James Cook University, Physical Sciences, Douglas, Australia
Thermochemical Maps of Earth’s Mantle Transition Zone from Reverberated Seismic Phases (1167015)
Rashni Anandawansha, New Mexico State University Main Campus, Physics, Las Cruces, NM, United States, Lauren Waszek, James Cook University, Physical Sciences, Douglas, Australia and Benoit Tauzin, Australian National University, Research School of Earth Sciences, Canberra, Australia
Volume Fraction of Subducted Basaltic Crust Above the Core-Mantle Boundary Revealed by PKPdf and PKPbc Waves (1174825)
Yingcai Zheng, University of Houston, Department of Earth and Atmospheric Sciences, Houston, United States, Hao Hu, University of Houston, Earth and Atmospheric Sciences, Houston, United States, Jiaxuan Li, California Institute of Technology, Seismological Laboratory, Pasadena, United States, Jin Zhang, Texas A & M University, College Station, United States, Vernon F Cormier, University of Connecticut, Groton, CT, United States, Ru-Shan Wu, University of California, Santa Cruz, Santa Cruz, United States, Michael C Fehler, Massachusetts Institute of Technology, Cambridge, United States and Thorne Lay, University of California Santa Cruz, Santa Cruz, CA, United States
Seismic evidence for a 1000-km mantle discontinuity under the Pacific (1179857)
Zhendong Zhang, Massachusetts Institute of Technology, Cambridge, MA, United States, Jessica C E Irving, University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom, Frederik Simons, Princeton University, Department of Geosciences, Princeton, NJ, United States and Tariq Alkhalifah, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
Constraining the H2O-CO2 volatile cycle under the Central Western US using Electrical Resistivity Images Derived from Magnetotelluric Data (1185879)
Kevin Anthony Anthony Mendoza, University of Utah, Department of Geology and Geophysics, Salt Lake City, United States, Philip E Wannamaker, University of Utah, Energy Geoscience Institute, Salt Lake City, UT, United States and Virginie Maris, University of Utah, Energy and Geoscience Institute, Salt Lake City, UT, United States
Dissolution of Calcium into Bridgmanite and Disappearance of Davemaoite in Warm Regions of the Lower Mantle (1186811)
Byeongkwan Ko, Michigan State University, East Lansing, MI, United States, Eran Greenberg, University of Chicago, Center for Advanced Radiation Sources, Lemont, IL, United States, Vitali B Prakapenka, The University of Chicago, Center for Advanced Radiation Sources, Chicago, United States, Ercan E. Alp, University of Chicago, Argonne, IL, United States, Wenli Bi, Argonne National Laboratory, Argonne, IL, United States, Yue Meng, HPCAT, X-Ray Science Division, Argonne National Laboratory, Argonne, United States, Dongzhou Zhang, Caltech-Seismolab, Pasadena, United States and Sang-Heon Shim, Arizona State University, School of Earth and Space Exploration, Tempe, United States
182W/184W of Deccan Carbonatites of India and Implications for Deep Carbon Sources (1190314)
Anupam Banerjee1, Hanika Rizo2 and Debajyoti Paul1, (1)Indian Institute of Technology Kanpur, Department of Earth Sciences, Kanpur, India, (2)Carleton University, Department of Earth Sciences, Ottawa, ON, Canada
Multistage Melting of Buoyant Mantle beneath the Fiji Triple Junction (1191606)
Jihye Oh1, Jonguk Kim1, Finlay M Stuart2, Seung-Sep Kim3, Gyuha Hwang1,3, Munjae Park4 and Insung Lee5, (1)KIOST Korea Institute of Ocean Science and Technology, Deep-sea and Seabed Mineral Resources Research Center, Busan, South Korea, (2)Scottish Universities Environmental Research Center at the University of Glasgow, East Kilbride, United Kingdom, (3)Chungnam National University, Daejeon, Korea, Republic of (South), (4)Chungbuk National University, Cheongju, Korea, Republic of (South), (5)Seoul Natl Univ, School of Earth and Environmental Sciences, Seoul, South Korea
Observations of Regional Seismic Discontinuities in the Earth’s Upper Mantle from SS- and PP- precursors (1196507)
Thuany Costa de Lima, Australian National University, Canberra, ACT, Australia, Lauren Waszek, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Benoit Tauzin, Laboratoire de Sciences de la Terre, Université de Lyon I, CNRS and Ecole Normale Supérieure de Lyon, UMR5570, Villeurbanne, France, Hrvoje Tkalcic, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia and Maxim Ballmer, UCL, Dept. of Earth Sciences, London, United Kingdom
