V011
Processes and Impacts of Crustal Recycling: Insights from Non-Traditional Stable Isotopes
Session ID#: 156616
Session Description:
Characterizing the fluxes of crustal material returned back to the mantle since the early Earth is key to modelling the evolution of the silicate portion of the planet. This requires a deep understanding of the physical and chemical reprocessing of igneous, metamorphic and sedimentary rocks as they sink and evolve in the mantle, as well as the development of sensitive tracers for the resulting crustal components. This session solicits contributions bringing new constraints on any aspects of crustal recycling using non-traditional stable isotopic systems. This includes studies of processes affecting/having affected crustal materials during their recycling at any settings (subduction zones, continental roots, collision zones), as well as contributions aiming at detecting and characterizing recycled crust stored in both the upper and lower mantle.
Co-Organized:
Index Terms:
1025 Composition of the mantle [GEOCHEMISTRY]
1031 Subduction zone processes [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
1041 Stable isotope geochemistry [GEOCHEMISTRY]
Primary Convener: Rachel Bezard, University of Göttingen, Department of Geochemistry and Isotope Geology, Göttingen, Germany
Convener: Richard M Gaschnig, University of Massachusetts Lowell, Environmental, Earth and Atmospheric Sciences, Lowell, United States
B Isotope Evidence for Subduction Input to Arc Magmatic Sources: A Case Study of Lavas from Paniri, Northern Chile (1104731)
Sinethemba Ncetani1, Petrus J le Roux2, Osvaldo González-Maurel2, Benigno Godoy3 and Dieter Garbe-Schönberg4, (1)University of Cape Town, Cape Town, South Africa, (2)University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, (3)Centro de Excelencia en Geotermia de los Andes (CEGA), Santiago, Chile, (4)CAU Kiel, Institute of Geosciences, Kiel, Germany
Molybdenum Isotopic Composition of Northwest Pacific Altered Oceanic Crust (1132035)
Ryan Waldman, University of South Carolina Columbia, Columbia, SC, United States, Ekaterina Rojas Kolomiets, University of South Carolina Columbia, Columbia, United States, Gene Yogodzinski, University of South Carolina, Columbia, SC, United States, Michael Bizimis, University of South Carolina, School of the Earth, Ocean and the Environment, Columbia, SC, United States, Folkmar Hauff, GEOMAR, Kiel, Germany and Kaj Hoernle, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Significant Variability in 87Sr/86Sr and δ88/86Sr in Saprolites: Implications for Timing of Weathering and Secondary Mineral formation (1145852)
Utpalendu Haldar, Indian Institute of Science, Centre for Earth Sciences, Bangalore, India, Sourav Ganguly, Indian Institute of Science Bangalore, Centre for Earth Sciences, Bengaluru, India, Ramananda Chakrabarti, Indian Institute of Science Bangalore, Centre for Earth Sciences, Bangalore, India and Roberta L Rudnick, University of California, Santa Barbara, CA, United States
Stable Strontium Isotope (δ88Sr) Constraints on Nicaraguan Arc Subduction Fluxes and Carbonate Recycling (1178581)
Alexander Hammerstrom1, Rita Parai2, Richard Carlson3 and Stephen Turner1, (1)University of Massachusetts Amherst, Department of Geosciences, Amherst, United States, (2)Washington University in St. Louis, Department of Earth and Planetary Sciences, St. Louis, MO, United States, (3)Carnegie Inst Washington, Earth and Planets Laboratory, Washington, United States
Novel stable isotope constraints on mantle mineralogical heterogeneity and the evolution of mantle plumes (Invited) (1066617)
Helen M. Williams1, Caroline Soderman2, Simon Matthews3, Esteban Gazel4, Dennis Geist5 and Oliver Shorttle1, (1)University of Cambridge, Cambridge, United Kingdom, (2)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, (3)University of Iceland, NordVulk, Institute of Earth Sciences, Reykjavik, Iceland, (4)Virginia Tech, Department of Geosciences, Blacksburg, United States, (5)University of Idaho, Moscow, ID, United States
Seeing Through the Effect of Magmatic Differentiation on the Mo Isotopic Composition of Tonga-Kermadec Arc Lavas (1086900)
Ricardo Pontow1, Rachel Bezard1, Matthias Willbold2 and Simon Turner3, (1)University of Göttingen, Department of Geochemistry and Isotope Geology, Göttingen, Germany, (2)University of Göttingen, Geochemistry and Isotope Geology, Göttingen, Germany, (3)Macquarie University, School of Natural Sciences, Sydney, Australia
Sources of dehydration fluids underneath the Kamchatka arc (Invited) (1088620)
Yunchao Shu, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Sune Nielsen, Woods Hole Oceanographic Institute, Woods Hole, United States, Véronique Le Roux, Woods Hole Oceanographic Inst, Geology & Geophysics Department, Woods Hole, MA, United States, Gerhard Worner, University of Goettingen, Gottingen, Germany, Jerzy Blusztajn, WHOI, Department of Marine Geology and Geophysics, Woods Hole, MA, United States and Maureen E E Auro, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States
