V048
The Formation and Evolution of the Continental Crust and its influence on the Hydro- and Atmosphere.
Session ID#: 83637
Session Description:
The continental crust of Earth is unique among the rocky planets. It has had an important role in modifying the composition of the hydrosphere and atmosphere through Earth history. However, the processes and the timing of when the continental crust formed remain the subject of vigorous debate. Similarly, our understanding of the volume and compositional evolution of the continental crust through Earth history remains poorly constrained. In this session we welcome interdisciplinary geological, geophysical, geodynamical and geochemical studies that shed light on how and when the continental crust was formed and modified and on its important role in Earthâs evolution.
Index Terms:
8408 Volcano/climate interactions [VOLCANOLOGY]
8413 Subduction zone processes [VOLCANOLOGY]
8486 Field relationships [VOLCANOLOGY]
8499 General or miscellaneous [VOLCANOLOGY]
Primary Convener: Oliver E Jagoutz, Massachusetts Institute of Technology, Cambridge, MA, United States
Conveners: Jill A VanTongeren, Rutgers University New Brunswick, New Brunswick, NJ, United States, Roger R Fu, MIT-EAP Sciences, Cambridge, MA, United States and Benjamin Z Klein, MIT, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
Primary Liaison: Oliver E Jagoutz, Massachusetts Institute of Technology, Cambridge, MA, United States
Early Continental Crustal Volume Estimates from Consideration of Hf isotopic Compositions and Geodynamic Regimes recorded in the Oldest (>3.6 Ga) Rocks (500833)
Vickie C Bennett, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia and Allen P. Nutman, University of Wollongong, GeoQuEST, School of Earth, Atmospheric and Life Sciences, Wollongong, Australia
Inferring Provenance for basal Quartzites of Singhbhum Craton, eastern India- a Petrographic and geochemical approach (505565)
Arvind Kumar Gond, Indian Institute of Technology (Indian School of Mines), Dhanbad, Department of Applied Geology, Dhanbad, India, Sukanta Dey, IISER-Kolkata, Department of Earth science, Mohanpur, Nadia, India and Rajagopal Anand, Indian Institute of Technology(Indian School of Mines), Dhanbad, Department of Applied Geology, Dhanbad, India
Limited continental emergence before 3.2 billion years recorded in oceanic crust oxygen isotopes (548124)
Benjamin W Johnson1,2, Sarah J Hurley3 and Boswell A Wing3, (1)Iowa State University, Atmospheric and Geological Sciences, Ames, United States, (2)University of Colorado at Boulder, Boulder, United States, (3)University of Colorado Boulder, Boulder, CO, United States
Zircon Hf isotope evidence for a global transition between stagnant- and mobile-lid tectonics (548939)
Ann Bauer1, Jesse Ray Reimink2, Tom Chacko3, Bradford J Foley4, Steven B Shirey2 and D. Graham Pearson5, (1)University of Wisconsin Madison, Madison, WI, United States, (2)Carnegie Institution for Science, Department of Terrestrial Magnetism, Washington, DC, United States, (3)University of Alberta, Earth and Atmospheric Sciences, Edmonton, AB, Canada, (4)Pennsylvania State University, State College, PA, United States, (5)University of Alberta, Earth & Atmospheric Sciences, Edmonton, AB, Canada
Paleomagnetic evidence for modern plate motion velocities at 3.2 Ga (612612)
Alec R Brenner, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, Roger R Fu, Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States, David AD Evans, Yale Univ, New Haven, CT, United States and Aleksey V Smirnov, Michigan Technological University, Geological and Mining Engineering and Sciences, Houghton, MI, United States
Hadean detrital zircons record crustal diversity but no evidence for Phanerozoic-type continental crust (Invited) (632872)
Nadja Drabon1, Benjamin L Byerly2, Gary R Byerly3, Joseph L Wooden4 and Donald R. Lowe1, (1)Stanford Earth Sciences, Stanford, CA, United States, (2)University of California, Santa Barbara, Santa Barbara, United States, (3)Louisana State Univ, Baton Rouge, LA, United States, (4)Oregon State University, Corvallis, OR, United States
