V006
A window into the Hadean Earth: Investigations into the formation conditions of Earth's oldest zircon grains
Session ID#: 81582
Session Description:
Conditions during Earth's 'Dark Age', the first ~550 Myr or the Hadean, have been identified by the National Research Council as one of the fundamental research problems within the Earth and Planetary Sciences. With virtually no rock record, Hadean zircon provides our only window into the near-surface conditions at their time of formation. The Hadean remains a time of vital importance in the evolution of our planet and investigations into possible scenarios for the formation of ancient zircon may informs us about the planetary conditions that ultimately lead to the creation of a habitable world and the origin of life. We invite research (including but not limited to: experimental and geochemical research, investigations of modern analogous, numerical modeling and simulations of early Earth conditions, impact research, etc.) into the possible formation conditions of ancient zircon grains and to how these results inform us about the conditions on early Earth.
Index Terms:
1060 Planetary geochemistry [GEOCHEMISTRY]
5215 Origin of life [PLANETARY SCIENCES: ASTROBIOLOGY]
5225 Early environment of Earth [PLANETARY SCIENCES: ASTROBIOLOGY]
5455 Origin and evolution [PLANETARY SCIENCES: SOLID SURFACE PLANETS]
Primary Convener: Matthew M. Wielicki, University of Alabama, Geological Sciences, Tuscaloosa, AL, United States
Conveners: Gavin Kenny, Swedish Museum of Natural History, Stockholm, Sweden, Elizabeth A Bell, UCLA, Los Angeles, CA, United States and Simone Marchi, NASA Lunar Science Institute, Boulder, CO, United States
Primary Liaison: Matthew M. Wielicki, University of Alabama, Geological Sciences, Tuscaloosa, AL, United States
Stepwise chemical abrasion ID-TIMS-TEA of Hadean Jack Hills Zircon fragments (Invited) (490305)
C. Brenhin Keller, Dartmouth College, Hanover, CA, United States, Patrick Boehnke, Eta Vision, Chicago, IL, United States, Blair Schoene, Princeton University, Department of Geosciences, Princeton, NJ, United States and T. Mark Harrison, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, United States
How To Better Understand Hadean Earth (491588)
Mark Harrison, University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States and Elizabeth A Bell, UCLA, Los Angeles, CA, United States
Leucogranite zircon: An analogue for Hadean zircons from Jack Hills, Western Australia (496503)
Matthew M. Wielicki, University of Alabama, Geological Sciences, Tuscaloosa, AL, United States, Michelle D Wielicki, University of Alabama, Geological Sciences, Tuscaloosa, United States and Mark Harrison, UCLA, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States
Single-grain 238U/235U measurements in Early Earth zircons: Implications for the Hadean environment, magmatic differentiation and geochronology (511164)
Francois Tissot, California Institute of Technology, Pasadena, CA, United States, Mauricio Ibanez-Mejia, University of Rochester, Rochester, NY, United States, Patrick Boehnke, Eta Vision, Chicago, IL, United States, Nicolas Dauphas, University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States, David McGee, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Timothy L Grove, Massachusetts Institute of Technology, Earth, Atmospheric & Planetary Sciences, Cambridge, MA, United States and Mark Harrison, UCLA, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States
Can Hadean Zircons Constrain the Late Heavy Bombardment? (520554)
Oscar M Lovera, University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, Mark Harrison, UCLA, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States and Sunshine Abbott, University of California Los Angeles, EPSS, Los Angeles, United States
Transitions between the Hadean, Archean, and Modern World: Zircon/melt Kds clarify formation conditions of Earth’s earliest crust (Invited) (552195)
Tamara Carley1, Elizabeth A Bell2, Lily L Claiborne3, Calvin F Miller3 and T. Mark Harrison4, (1)Lafayette College, Earth and Environmental Geosciences, Easton, PA, United States, (2)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, (3)Vanderbilt University, Earth and Environmental Sciences, Nashville, TN, United States, (4)University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, United States
