DI44A:
Chemistry of the Earth's Mantle: Implications for the Structure and Evolution of the Earth III


Session ID#: 10232

Session Description:
Placing constraints on the geodynamic evolution of the Earth’s mantle, from terrestrial accretion to the present day, is critically important to a wide range of disciplines examining the deep Earth.  Long-standing models for the bulk composition of the Earth have been called into question. The discovery of small isotopic difference between the Earth and the chondritic reservoir has had enormous impact in Earth Science, from introducing new ideas like collisional erosion to suggesting hidden reservoirs in the deep mantle, and has forced the community to re-evaluate Earth’s chemical composition and structure.  In this session we invite contributions that further our understanding of the formation and structure of the Earth, its bulk composition, and the evolution of the crust-mantle system over 4.5 Ga. We welcome a multidisciplinary and integrative approach to the above problems and encourage contributions from the related fields of geochemistry, geodynamics, seismology and mineral physics.
Primary Convener:  Shichun Huang, University of Nevada Las Vegas, Las Vegas, NV, United States
Conveners:  Christy B. Till, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States, Rita Parai, Carnegie Institution of Washington, Department of Terrestrial Magnetism, Washington, DC, United States and Sujoy Mukhopadhyay, University of California Davis, Department of Earth and Planetary Sciences, Davis, United States
Chairs:  Christy B. Till, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States, Ariel D Anbar, Arizona State University, Department of Chemistry, Tempe, AZ, United States and Shichun Huang, University of Nevada Las Vegas, Las Vegas, NV, United States
OSPA Liaison:  Christy B. Till, Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States

Cross-Listed:
  • MR - Mineral and Rock Physics
  • P - Planetary Sciences
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1020 Composition of the continental crust [GEOCHEMISTRY]
1025 Composition of the mantle [GEOCHEMISTRY]
3621 Mantle processes [MINERALOGY AND PETROLOGY]
7208 Mantle [SEISMOLOGY]

Abstracts Submitted to this Session:

How Depleted is the MORB mantle? (75195)
Albrecht W Hofmann, Max Planck Institute for Chemistry, Mainz, Germany and Stanley R Hart, Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United States
Helium isotopes reveal a ubiquitous recycled component in the MORB mantle (75614)
Jonathan Tucker1, Charles H Langmuir1, Sujoy Mukhopadhyay2, Cedric Hamelin3 and Jocelyn Fuentes4, (1)Harvard University, Earth and Planetary Sciences, Cambridge, United States, (2)University of California Davis, Department of Earth and Planetary Sciences, Davis, United States, (3)Independant scholar, Bergen, Norway, (4)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
HOW DO EARLY IMPACTS MODULATE THE TECTONIC, MAGNETIC AND CLIMATIC EVOLUTIONS OF TERRESTRIAL PLANETS? (75604)
Mark Jellinek, University of British Columbia, Vancouver, BC, Canada, Matthew G Jackson, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, Adrian Lenardic, Rice University, Earth, Environmental and Planetary Sciences, Houston, TX, United States and Matt B Weller, Rice University, Earth Science, Houston, TX, United States
The deep oxygen cycle in the early Earth (Invited) (59406)
Catherine A McCammon1, Jack van Driel2, Ilya Kupenko3, Ryosuke Sinmyo4, Valerio Cerantola5, Vasily Potapkin6, Alexander I Chumakov5, Rudolf Rüffer5 and Leonid S Dubrovinsky1, (1)University of Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (2)University College London, Department of Earth Sciences, London, United Kingdom, (3)Universitaet Muenster, Institute for Mineralogy, Muenster, Germany, (4)Tokyo Institute of Technology, Tokyo, Japan, (5)ESRF European Synchrotron Radiation Facility, Grenoble, France, (6)Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany
The Mantle-Atmosphere Connection: Oxidation of the Atmosphere through Mantle Convection (85802)
Kanani K M Lee, Yale University, Department of Geology & Geophysics, New Haven, CT, United States, Tingting Gu, Yale University, New Haven, CT, United States, Mingming Li, Arizona State University, Tempe, AZ, United States and Catherine A McCammon, University of Bayreuth, Bayreuth, Germany
Controls on Atmospheric O2: The Anoxic Archean and the Suboxic Proterozoic (Invited) (59431)
James F Kasting, Pennsylvania State University, University Park, PA, United States
The Oxidation State of Komatiites and the Redox History of the Mantle (70082)
Robert Nicklas, University of Maryland College Park, College Park, MD, United States, Igor S Puchtel, University of Maryland College Park, Department of Geology, College Park, MD, United States and Richard D Ash, University of Maryland, College Park, MD, United States
Changes in magmatic oxidation state induced by degassing (75812)
Maryjo N Brounce, California Institute of Technology, Pasadena, United States, Edward M Stolper, California Institute of Technology, Pasadena, CA, United States and John M Eiler, Caltech, Pasadena, United States

See more of: Study of Earth's Deep Interior