V43D:
Interdisciplinary Perspectives on Continental Crust Evolution I


Session ID#: 7862

Session Description:
There are still many outstanding questions regarding the modus operandi of continental crust formation and destruction, its volume, composition, thickness, and its interaction with the mantle and the atmosphere through time; especially during the early stages of Earth's evolution. New perspectives are rising from the increased understanding of the geochemical record preserved in igneous and sedimentary rocks, minerals and their inclusions, the improvement of analytical techniques, and the development of both analogue and numerical modeling of crust-mantle interaction through time. This session welcomes contributions that address the origin and evolution of the crust and/or the lithosphere, using one or a combination of these different approaches. Contributions that present new approaches and/or new (interdisciplinary) analytical techniques will be particularly welcome.
Primary Convener:  Bruno Dhuime, University of Bristol, School of Earth Sciences, Bristol, United Kingdom
Conveners:  Esteban Gazel, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States, Claire E Bucholz, Massachusetts Institute of Technology, Cambridge, United States and Jeroen Van Hunen, University of Durham, Department of Earth Sciences, Durham, United Kingdom
Chairs:  Claire E Bucholz, Massachusetts Institute of Technology, Cambridge, United States and Esteban Gazel, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
OSPA Liaison:  Claire E Bucholz, Massachusetts Institute of Technology, Cambridge, United States
Co-Organized with:
Volcanology, Geochemistry and Petrology, and Tectonophysics

Cross-Listed:
  • T - Tectonophysics
Co-Sponsor(s):
  • EGU-GMPV: European Geosciences Union – Geochemistry, Mineralogy, Petrology, and Volcanology - European Geosciences Union – Geochemistry, Mineralogy, Petrology, and Volcanology
  • GS: Geochemical Society - Geochemical Society
Index Terms:

1020 Composition of the continental crust [GEOCHEMISTRY]
1040 Radiogenic isotope geochemistry [GEOCHEMISTRY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8125 Evolution of the Earth [TECTONOPHYSICS]

Abstracts Submitted to this Session:

The role of continents in modulating the whole Earth carbon and oxygen cycles (Invited) (58396)
Cin-Ty Lee, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States
A comparison of the seismic structure of oceanic island arc crust and continental accreted arc terranes (Invited) (58446)
Andrew J Calvert, Simon Fraser University, Department of Earth Sciences, Burnaby, BC, Canada
Continental Lower Crust: Wavespeeds, Composition, and Relamination (69382)
Bradley R Hacker, University of California Santa Barbara, Department of Earth Science, Santa Barbara, CA, United States, Peter B Kelemen, Columbia University of New York, Palisades, NY, United States and Mark D Behn, Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, MA, United States
Density Sorting During the Evolution of Continental Crust (80073)
Peter B Kelemen, Columbia University of New York, Palisades, NY, United States, Mark D Behn, Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, MA, United States and Bradley R Hacker, University of California Santa Barbara, Santa Barbara, CA, United States
The Rock Record Has It About Right—No Significant Continental Crust Formation Prior to 3.8 Ga (85085)
Jeffrey D. Vervoort1, Anthony I Kemp2, Christopher M Fisher3, Ann Bauer4 and Samuel A Bowring4, (1)Washington State University, School of the Environment, Pullman, WA, United States, (2)University of Western Australia, School of Earth Sciences, Crawley, Australia, (3)Washington State University, Pullman, WA, United States, (4)University of Wisconsin Madison, Madison, WI, United States
87Sr/86Sr Ratios in Carbonate From the Red Lake and Steep Rock Groups in Canada Suggest Rb-enriched Continental Crust was Influencing Seawater Chemistry Prior to 3.0 Ga (73463)
Aaron Satkoski1, Philip William Fralick2, Brian L Beard3 and Clark Johnson3, (1)University of Texas at Austin, Dept. of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States, (2)Lakehead University, Department of Geology, Thunder Bay, ON, Canada, (3)University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States
The Role of Accessory Phases in the Sm-Nd Isotope Systematics of the Acasta Gneiss Complex (86031)
Ann Bauer, University of Wisconsin Madison, Madison, WI, United States, Christopher M Fisher, Washington State University, Pullman, WA, United States, Jeffrey D. Vervoort, Washington State University, School of the Environment, Pullman, WA, United States and Samuel A Bowring, Massachusetts Institute of Technology, Cambridge, MA, United States
An Early, Transient, Impact-driven Tectonic Regime in the Hadean? (Invited) (68791)
Craig O'Neill, Queensland University of Technology, Earth and Atmospheric Sciences, Brisbane, QLD, Australia, Simone Marchi, Southwest Research Institute Boulder, Boulder, CO, United States and Siqi Zhang, Macquarie University, Sydney, NSW, Australia

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