T53C:
Secular Change in Earth Processes: Shifting Uniformitarianism II

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Session ID#: 16525

Session Description:
An array of evidence continues to mount that many of the geologic processes observed today are very different than the processes that shaped the early Earth. The rock record throughout geologic history preserves petrological, structural, geochemical and isotope evidence for significant changes in Earth processes. From secular cooling in the mantle to the shifts in atmospheric chemistry, these changes extend from deep in the Earth’s interior to the edge of space. Understanding secular change in Earth processes is important as these processes affect the mechanisms of growth and reworking of the continental crust, contribute to global climate change and control the location and timing of the mineral endowments necessary to support human ambition in the future. We invite research contributions that use field-based, experimental, geophysical, petrological, geochemical, and/or modelling techniques to investigate secular change in geodynamic processes from the Hadean to the Holocene.
Primary Convener:  Christopher J Spencer, Curtin University, Dept of Applied Geology, Perth, WA, Australia
Conveners:  Christopher J Spencer, Curtin University, Dept of Applied Geology, Perth, WA, Australia, Kent C Condie, New Mexico Institute of Mining and Technology, Socorro, NM, United States and Craig O'Neill, Queensland University of Technology, Earth and Atmospheric Sciences, Brisbane, QLD, Australia
Chairs:  Craig O'Neill, Queensland University of Technology, Earth and Atmospheric Sciences, Brisbane, QLD, Australia and Christopher J Spencer, Curtin University, Dept of Applied Geology, Perth, WA, Australia
OSPA Liaison:  Christopher J Spencer, Curtin University, Dept of Applied Geology, Perth, WA, Australia
Index Terms:

1645 Solid Earth [GLOBAL CHANGE]
8110 Continental tectonics: general [TECTONOPHYSICS]
8157 Plate motions: past [TECTONOPHYSICS]
8178 Tectonics and magmatism [TECTONOPHYSICS]

Abstracts Submitted to this Session:

The Significance of Zircon Age Peaks: Crustal Production or Selective Preservation (119537)
Kent C Condie, New Mexico Institute of Mining and Technology, Earth and Environmental Science, Socorro, NM, United States, Nicholas T Arndt, ISTerre, Unversite J Fourier, St. Martin D'''Heres, France, Anne Davaille, CNRS / University Paris-Sud, Laboratoire FAST, Orsay, France and Stephen J Puetz, Progressive Science Institute, Honolulu, HI, United States
The Birth of a Cratonic Core: Petrologic Evolution of the Hadean-Eoarchean Acasta Gneiss Complex (Invited) (121742)
Jesse Ray Reimink1, Tom Chacko2, Joshua Davies3, Graham Pearson4, Richard A Stern5, Larry M Heaman5, Richard Carlson6 and Steven B Shirey7, (1)Carnegie Institution for Science, DTM, Washington, DC, United States, (2)University of Alberta, Edmonton, AB, Canada, (3)University of Geneva, Earth Sciences, Geneva, Switzerland, (4)University of Alberta, Earth & Atmospheric Sciences, Edmonton, AB, Canada, (5)University of Alberta, Earth and Atmospheric Sciences, Edmonton, AB, Canada, (6)Carnegie Inst Washington, Earth and Planets Laboratory, Washington, United States, (7)Carnegie Science, Earth and Planets Laboratory, Washington, United States
Punctuated Growth of the Continental Crust (198976)
Stephen Wayne Parman, Brown University, DEEPS - Dept of Earth, Environmental and Planetary Sciences, Providence, United States
Secular geodynamic changes at the base of the crust recorded by anorthosites (170958)
Grant Michael Bybee, University of Witwatersrand, Wits, South Africa and Stephen Wayne Parman, Brown University, DEEPS - Dept of Earth, Environmental and Planetary Sciences, Providence, United States
Plume-induced cratonization in Archean Earth (Invited) (119393)
Taras Gerya, ETH Zurich, Department of Earth Sciences, Zurich, Switzerland, Elena Sizova, University of Graz, Department of Earth Science, Graz, Austria, Svetlana V. Bogdanova, Lund University, Lund, Sweden and Paul Tackley, ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland
The energetics of mixed-mode heating in convective systems: Internal heating rates, plate speeds, and implications for the Earth's thermal evolution. (132163)
Matt B Weller, Institute for Geophysics at the University of Texas, Austin, Austin, TX, United States; Lunar and Planetary Institute, Houston, United States and Adrian Lenardic, Rice University, Earth, Environmental, and Planetary Sciences, Houston, United States
Towards a Holistic Model for the Tectonic Evolution of the North China Craton (157192)
Timothy M Kusky1, Ali Polat2, Brian F Windley3, Junpeng Wang1 and Hao Deng1, (1)China University of Geosciences Wuhan, Wuhan, China, (2)University of Windsor, Earth and Environmental Sciences, Windsor, ON, Canada, (3)University of Leicester, Leicester, United Kingdom
Atmosphere-ocean-lithosphere interactions during the Great Oxidation Event: insights from zircon δ18O (142805)
Christopher J Spencer1, Camille A Partin2, Christopher Kirkland1, Christine Shiels2, Timothy D Raub3 and Peter Kinny1, (1)Curtin University, Dept of Applied Geology, Perth, WA, Australia, (2)University of Saskatchewan, Saskatoon, SK, Canada, (3)University of St Andrews, Balmullo, United Kingdom

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