DI43B:
Chemistry of the Earth's Mantle: Implications for the Structure and Evolution of the Earth II


Session ID#: 7746

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, CA, United States
Chairs:  Matthew G Jackson, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, Rita Parai, Carnegie Institution for Science Washington, Washington, DC, United States and Sujoy Mukhopadhyay, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States
OSPA Liaison:  Rita Parai, Carnegie Institution of Washington, Department of Terrestrial Magnetism, Washington, DC, United States
Co-Organized with:
Study of Earth's Deep Interior, Planetary Sciences, and Volcanology, Geochemistry and Petrology

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:

Melt Zone Fringes and the Geochemistry of Earth’s Mantle (84527)
Donald J DePaolo, University of California Berkeley, Berkeley, CA, United States
Neon isotopes show that Earth was accreted from irradiated material (68913)
Manuel A Moreira, Institut de Physique du Globe de Paris, Paris, France
The Triple Oxygen Isotopic Composition of High 3He/4He Mantle (79467)
Stephen Wayne Parman1, Colin Jackson2, Natalie Starkey3, Richard Greenwood3, Ian Franchi3, Matthew G Jackson4, J Godfrey Fitton5, Finlay M. Stewart6 and Lotte M Larsen7, (1)Brown University, DEEPS - Dept of Earth, Environmental and Planetary Sciences, Providence, RI, United States, (2)Geophysical Laboratory, Washington Dc, DC, United States, (3)Open University, Planetary and Space Sciences, Milton Keynes, United Kingdom, (4)University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, (5)University of Edinburgh, School of GeoSciences, Edinburgh, United Kingdom, (6)Scottish Universities Environmental Research Center at the University of Glasgow, East Kilbride, United Kingdom, (7)Geological Survey of Denmark and Greenland, Copenhagen, Denmark
Causes of 142Nd Variation in Earth (61279)
Maud Boyet1,2, Audrey Bouvier3, Abdelmouhcine Gannoun2 and Richard Carlson4, (1)CNRS, Clermont-Ferrand, France, (2)University Blaise Pascal Clermont-Ferrand II, Laboratoire Magmas et Volcans, Clermont-Ferrand, France, (3)University of Western Ontario, Earth Sciences, London, ON, Canada, (4)Carnegie Inst Washington, Earth and Planets Laboratory, Washington, United States
Memories of Earth Formation in the Modern Mantle: W Isotopic Composition of Flood Basalt Lavas (63887)
Hanika Rizo, Carleton University, Department of Earth Sciences, Ottawa, ON, Canada, Richard J Walker, University of Maryland College Park, Department of Geology, College Park, MD, United States, Richard Carlson, Carnegie Inst Washington, Earth and Planets Laboratory, Washington, United States, Mary F Horan, Carnegie Inst of Washington, Washington, DC, United States, Sujoy Mukhopadhyay, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States, Don Francis, McGill University, Montreal, QC, Canada and Matthew G Jackson, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States
Probing redox states in the ancient and modern crust and possible biosphere-lithosphere interactions (73139)
Dustin Trail, University of Rochester, Rochester, NY, United States
Effect of Spin Transition onComposition and Seismic Structure of the Lower Mantle (61435)
Zhongqing Wu, University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China
Morphology of Large- and Meso-scale structures in the Mid and Lower Mantle (65511)
Vedran Lekic, University of Maryland, College Park, MD, United States and Sanne Cottaar, University of Cambridge, Cambridge, United Kingdom

See more of: Study of Earth's Deep Interior