V41A:
Physical and Chemical Constraints on the Moon-Forming Impact II Posters

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Session ID#: 18109

Session Description:
Recent hydrodynamic simulations of the Moon-forming impact have indicated that the mass of the impactor may not have been close to the “canonical” 0.15 ME but could have been, depending on initial conditions, between 0.05 and 0.5 ME. At the same time, geochemical and isotopic measurements increasingly show that Earth and Moon are virtually identical in a range of elemental isotopic compositions and trace element ratios. The outstanding problem now is how these different models and constraints can be reconciled to provide a coherent view of lunar formation. This may require post-impact vapor-phase equilibration of moon and protoEarth, or, alternatively, a narrow range of protoEarth and impactor compositions. The aim of this session is to bring together researchers concerned with the reconciliation of physical and chemical models of lunar origin. We are particularly interested in contributions which provide new data or which propose possible new constraints on the process.
Primary Convener:  Bernard J Wood, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Conveners:  Rita Parai1, Jon Wade2 and Stephen M Elardo1, (1)Carnegie Institution for Science Washington, Washington, DC, United States(2)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Chairs:  Jon Wade1, Rita Parai2 and Stephen M Elardo2, (1)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom(2)Carnegie Institution for Science Washington, Washington, DC, United States
OSPA Liaison:  Jon Wade, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Index Terms:

1026 Composition of the moon [GEOCHEMISTRY]
1060 Planetary geochemistry [GEOCHEMISTRY]
5455 Origin and evolution [PLANETARY SCIENCES: SOLID SURFACE PLANETS]
6250 Moon [PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS]

Abstracts Submitted to this Session:

Magma ascent and magmatism controlled by cratering on the Moon (120151)
Chloe Michaut, Institut de Physique du Globe de Paris, Paris, France and Virginie Pinel, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, Grenoble, France
Terrestrial magma ocean origin of the Moon: A numerical study of a giant impact incorporating the different equations of state for melts and solids (153519)
Natsuki Hosono, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Shun-ichiro Karato, Yale University, Earth and Planetary Sciences, New Haven, CT, United States and Junichiro Makino, Center for Planetary Science, Kobe University, Kobe, Japan; RIKEN Advanced Institute for Computational Sciences, Kobe, Japan
Composition and Origin of Theia - the Moon-Forming Impactor (160480)
Seth A Jacobson1, David C Rubie2, Alessandro Morbidelli1 and Edward D Young3, (1)Observatory Cote D'Azur, Nice Cedex 04, France, (2)University of Bayreuth, Bayreuth, Germany, (3)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, United States
Making The Moon From The Earth - An Internally Consistent Isotopic And Chemical Model (174396)
Jon Wade and Bernard J Wood, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
First-principles Calculations of Equilibrium Calcium Isotope Fractionation among Ca-bearing Minerals (170286)
Chen Zhou1, Wenzhong Wang2, Jinting Kang2, Zhongqing Wu3 and Fang Huang1, (1)University of Science and Technology of China, Hefei, China, (2)University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, (3)University of Science and Technology of China, Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, Hefei, China
Massive Impact-Induced Release of Carbon and Sulfur Gases in the Early Earth’s Atmosphere (128690)
Simone Marchi, Southwest Research Institute Boulder, Boulder, CO, United States, Benjamin A Black, CUNY City College of New York, New York, NY, United States, Linda T Elkins-Tanton, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States and William F Bottke Jr, Southwest Research Institute, Boulder, United States
Dual Si and O Isotope Measurement of Lunar Samples Using IRMS (176684)
Patrick James Albert Hill, University of Western Ontario, London, ON, Canada, Neil Banerjee, Western University, Department of Earth Sciences, London (Ontario), ON, Canada and Gordon R Osinski, University of Western Ontario, Physics and Astronomy, London, ON, Canada
Discrete stages of core formation survive the Moon-forming impact (148157)
Colin Jackson, Neil Bennett, Zhixue Du and Yingwei Fei, Carnegie Institution for Science, Geophysical Laboratory, Washington, DC, United States
Viscosity and Structure of a Late Lunar Magma Ocean Liquid: Implications for the Purity of Ferroan Anorthosites and the Dynamics of a Crystallizing Magma Ocean (196053)
Jung-Fu Lin1, Nicholas J Dygert2, Edward W Marshall2, Yoshio Kono3 and James E Gardner4, (1)The University of Texas at Austin, Department of Earth and Planetary Sciences, Jackson School of Geosciences, Austin, United States, (2)University of Texas at Austin, Austin, TX, United States, (3)Carnegie Institution for Science Washington, Washington, DC, United States, (4)University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States
Illusory Late Heavy Bombardments (132088)
Patrick Boehnke, University of Chicago, Chicago, IL, United States and T. Mark Harrison, University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States

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