V12A:
Formation of Earth and Its Chemical Reservoirs from High-Precision Isotope Measurements, Dynamical Modelling, Seismology, and Experimental Petrology I

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Session ID#: 35691

Session Description:
Identification of Earth’s building blocks and the processes by which its interior evolved remain active areas of investigation. Decades of isotopic analyses, dynamical modelling, and experimental petrology have allowed for a multidisciplinary assessment of key events in Earth history. While recent analytical developments have led to high-precision isotope analyses that are revolutionizing the field, identifying Earth’s precursors and understanding how its poorly-mixed interior developed remain unclear. Related processes include main-stage accretion, the Moon-forming event, core segregation, mantle crystallization, late accretion, and crust formation. This session calls on studies that focus on deciphering Earth’s accretionary history and long-term crust-mantle evolution. In particular, research that integrates high-precision isotope ratio analyses (stable or radiogenic) of cosmo- or geo-chemical materials, with dynamical modelling, seismology, or experimental petrology.
Primary Convener:  Katherine R Bermingham, University of Maryland College Park, Department of Geology, College Park, United States
Convener:  Jesse Ray Reimink, Carnegie Institution for Science, DTM, Washington, DC, United States
Chairs:  Jesse Ray Reimink, Carnegie Institution for Science, DTM, Washington, DC, United States and Katherine R Bermingham, University of Maryland College Park, Department of Geology, College Park, United States
OSPA Liaison:  Katherine R Bermingham, University of Maryland College Park, Department of Geology, College Park, United States

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • P - Planetary Sciences
Index Terms:

1040 Radiogenic isotope geochemistry [GEOCHEMISTRY]
1041 Stable isotope geochemistry [GEOCHEMISTRY]
1060 Planetary geochemistry [GEOCHEMISTRY]
6240 Meteorites and tektites [PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS]

Abstracts Submitted to this Session:

Radial Mixing and Ru–Mo Isotope Systematics Under Different Accretion Scenarios (Invited) (207223)
Rebecca A. Fischer, Harvard University, Cambridge, MA, United States, Francis Nimmo, University of California, Santa Cruz, Department Earth and Planetary Sciences, Santa Cruz, United States and David P O'Brien, Planetary Science Institute, Tucson, AZ, United States
Heterogeneous Delivery of Silicate and Metal to the Earth via Large Planetesimals (262726)
Simone Marchi, Southwest Research Institute Boulder, Boulder, CO, United States, Robin M Canup, Southwest Research Institute, Boulder, United States and Richard J Walker, University of Maryland College Park, Department of Geology, College Park, MD, United States
Xe isotopic constraints on cycling of deep Earth volatiles (Invited) (276784)
Rita Parai, Washington University in St Louis, Earth, Environmental, and Planetary Sciences, St. Louis, MO, United States and Sujoy Mukhopadhyay, Harvard Univ, Cambridge, United States
Primordial domains in the depleted upper mantle identified by noble gases in MORBs (254018)
Jonathan Tucker, Carnegie Institution for Science, Department of Terrestrial Magnetism, Washington, MA, United States, Sujoy Mukhopadhyay, Arizona State University, Department of Earth and Planetary Sciences, Tempe, AZ, United States, Charles H Langmuir, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, Cedric Hamelin, Independant scholar, Bergen, Norway and Jocelyn Fuentes, Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
Mantle plumes and hotspot geochemistry (235260)
Matthew G Jackson, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Jasper G Konter, University of Hawaii at Manoa, SOEST, Honolulu, HI, United States
Hadean silicate differentiation revealed by anomalous 142Nd in the Réunion hotspot source (276003)
Bradley James Peters1, Richard Carlson2, James M Day3 and Mary Horan1, (1)Carnegie Inst Washington, Department of Terrestrial Magnetism, Washington, DC, United States, (2)Carnegie Inst Washington, Earth and Planets Laboratory, Washington, United States, (3)Scripps Institution of Oceanography, Geosciences Research Division, La Jolla, United States
High-Silica Hadean Crust (276524)
Patrick Boehnke, Eta Vision, Chicago, IL, United States, Elizabeth A Bell, University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, United States, Thomas Stephan, The University of Chicago, Chicago, United States, Reto Trappitsch, University of Chicago, Chicago, IL, United States, C. Brenhin Keller, Dartmouth College, Department of Earth Sciences, Hanover, NH, United States, Olivia Pardo, University of Chicago, Geophysical Sciences, Chicago, United States, Andrew M Davis, University of Chicago, Department of the Geophysical Sciences, Enrico Fermi Institute, and Chicago Center for Cosmochemistry, Chicago, IL, United States, T. Mark Harrison, UCLA, Earth, Planetary, and Space Sciences, Los Angeles, United States and Mike J Pellin, Argonne National Laboratory, Argonne, IL, United States

See more of: Volcanology, Geochemistry and Petrology