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Session Proposal: Critical Insights on the Secular Evolution of Earth’s Mantle and Crust (AGU25)

V006
Critical Insights on the Secular Evolution of Earth’s Mantle and Crust

Session ID#: 251664

Session Description:
The Earth is a collection of large-scale, interacting systems that have undergone dramatic changes since the planet formed.  Understanding the secular evolution of these systems has been one of the most effective ways of defining the major processes occurring within them and the interactions between them. This session examines important critical insights that have been made on the secular evolution of Earth’s mantle and crust and looks forward to new critical insights needed to make further progress. Example topics are the extent to which deep mantle plumes have modified the composition of the continental crust through time; whether wet or dry magmas formed Archean anorthosite-bearing layered intrusions; why late Archean (2.7 Ga) greenstone volcanism was apparently such a massive, widespread event; and the tectonic setting of alkaline (A-type), ferroan, potassic granite and massif-type anorthosite during the Middle Proterozoic. Any similar topics relevant to volcanology, geochemistry and petrology are welcome.
Co-Sponsor(s):
  • DI - Study of the Earth's Deep Interior
  • EP - Earth and Planetary Surface Processes
  • P - Planetary Sciences
  • T - Tectonophysics
Index Terms:

1020 Composition of the continental crust [GEOCHEMISTRY]
1025 Composition of the mantle [GEOCHEMISTRY]
3619 Magma genesis and partial melting [MINERALOGY AND PETROLOGY]
8178 Tectonics and magmatism [TECTONOPHYSICS]
Primary Convener:  Paul Sylvester, Texas Tech University, Department of Geosciences, Lubbock, TX, United States
Conveners:  A. Kate Souders, US Geological Survey, Denver, CO, United States and Keiko Hattori, Univ Ottawa, Ottawa, ON, Canada
Student/Early Career Convener:  Diana Urda, Texas Tech University, Geosciences, Lubbock, United States
 
Evolution of subaerial cratonic exposure through the lens of low-δ¹⁸O meteoric hydrothermal systems: An update on an intact Neoarchean system from Kola Craton based on multiple isotope proxies (H, Si, triple O, Hf) (1895597)
David O Zakharov, Western Michigan University, Kalamazoo, United States, Dmitry Zozulya, Geological Institute, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russia, Massimo Chiaradia, University of Geneva, Geneva, Switzerland, Patrick Frings, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Anne-Sophie Bouvier, University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland
 
A step change in Earth thermal history driven by the onset of plate tectonics (1898628)
Jiale Mou, Rice University, Department of Earth, Enviromental and Planetary Sciences, Houston, United States and Cin-Ty Lee, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States
 
Effect of chemical and isotopic variation of DMM on the estimation of recycling ages of oceanic crusts (1941976)
Gen Shimoda, Geological Survey of Japan, Tsukuba, Japan and Tetsu Kogiso, Kyoto University, Kyoto, Japan
See more of: Volcanology, Geochemistry and Petrology
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