DI22A:
Geochemical and Geophysical Links between Subduction Zone Dynamics and Arc Systems II


Session ID#: 9788

Session Description:
This session aims to explore the complex processes linking subduction dynamics and arc volcanism. We focus particularly on reconciling geochemical and geophysical observables with dynamic processes.  Subduction zones exhibit heterogeneity in composition and thickness of subducting sediments, slab age and morphology, faulting characteristics, and thermal structure.  This heterogeneity leads to temporal and spatial variability in mantle flow, seismicity, magma composition and productivity, and rates of subduction and back-arc spreading. The physical-chemical conditions and processes in arc systems have been inferred from geophysical and geochemical observations, experimental rheologic data, and geodynamic modeling. We invite contributions from these disciplines and others that link the physical-chemical conditions at volcanic arcs and the underlying mantle wedge with the dynamic processes in subduction zones.
Primary Convener:  Aubreya Nicole Adams, Colgate University, Department of Earth and Environmental Geosciences, Hamilton, United States
Conveners:  Erin A Wirth, Yale University, New Haven, United States, Ikuko Wada, Department of Earth Sciences, Minneapolis, United States and Maryjo N Brounce, University of Rhode Island Narragansett Bay, Narragansett, RI, United States
Chairs:  Aubreya Nicole Adams, Colgate University, Department of Earth and Environmental Geosciences, Hamilton, United States and Erin A Wirth, Yale University, New Haven, United States
OSPA Liaison:  Maryjo N Brounce, University of Rhode Island Narragansett Bay, Narragansett, RI, United States
Co-Organized with:
Study of Earth's Deep Interior, Seismology, Tectonophysics, and Volcanology, Geochemistry and Petrology

Cross-Listed:
  • S - Seismology
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1031 Subduction zone processes [GEOCHEMISTRY]
7240 Subduction zones [SEISMOLOGY]
8170 Subduction zone processes [TECTONOPHYSICS]
8185 Volcanic arcs [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Fluid and mass transfer into the cold mantle wedge of subduction zones: budgets and seismic constraints (Invited) (78978)
Geoffrey A Abers, Cornell University, Ithaca, NY, United States, Bradley R Hacker, University of California Santa Barbara, Santa Barbara, CA, United States, Peter E van Keken, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Junichi Nakajima, Tokyo Institute of Technology, Tokyo, Japan and Saeko Kita, National Research Institute for Earth Science, Tsukuba, Japan
Magmatism, mantle evolution and geodynamics at the converging plate margins of Italy (69353)
Maria-Luce Frezzotti, University of Milan - Bicocca, Department of Earth and Environmental Sciences, Milan, Italy and Angelo Peccerillo, University of Milan - Bicocca, Milan, Italy
Focusing Fluids towards the Arc: the Role of Rehydration Reactions and Rheology (Invited) (80966)
Cian R Wilson, Carnegie Science, Earth and Planets Laboratory, Washington, United States, Marc W Spiegelman, Columbia University of New York, Palisades, NY, United States, Peter E van Keken, University of Michigan Ann Arbor, Ann Arbor, MI, United States and Bradley R Hacker, University of California Santa Barbara, Santa Barbara, CA, United States
Constraining Slab Breakoff Induced Magmatism through Numerical Modelling (61849)
Rebecca Freeburn1, Jeroen Van Hunen2, Benjamin Louis Maunder3, Valentina Magni1 and Pierre Bouilhol4, (1)University of Durham, Durham, United Kingdom, (2)University of Durham, Department of Earth Sciences, Durham, United Kingdom, (3)University of Durham, Durham, DH1, United Kingdom, (4)Durham University, Durham, United Kingdom
Modeling Diverse Pathways to Age Progressive Volcanism in Subduction Zones. (Invited) (86247)
Christopher R Kincaid1, Sara Szwaja2, Richard Tucker Sylvia2 and Kelsey A Druken3, (1)University of Rhode Island, Narragansett, RI, United States, (2)University of Rhode Island Narragansett Bay, Narragansett, RI, United States, (3)Australian National University, Canberra, ACT, Australia
Effects of “Hot Fingers” on the Thermal Structure and Mantle Wedge Flow Pattern in Subduction Zones: Implications for Seismic Anisotropy and Volcanic Spacing in Northeast Japan (77699)
Changyeol Lee, Chonnam National University, Gwangju, Korea, Republic of (South) and Ikuko Wada, Department of Earth Sciences, Minneapolis, United States
Freshly brewed continental crust (Invited) (58514)
Esteban Gazel, Cornell University, Ithaca, NY, United States, Jorden L Hayes, University of Wyoming, Laramie, United States, Mark J Caddick, Virginia Tech, Blacksburg, VA, United States and Pilar Madrigal, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
Tracking along-arc sediment inputs to the Aleutian arc using thallium isotopes (63467)
Sune Nielsen1, Julie Prytulak2, Terry A Plank3, Gene M Yogodzinski4, Tristan J Kading5, Jerzy Blusztajn6, Maureen E E Auro7, Suzanne Mahlburg Kay8 and Robert W Kay8, (1)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, United States, (2)Imperial College London, London, United Kingdom, (3)Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, (4)University of South Carolina, School of Earth-Ocean-Environment, Columbia, United States, (5)Woods Hole Oceanographic Insti, Woods Hole, MA, United States, (6)WHOI, Department of Marine Geology and Geophysics, Woods Hole, MA, United States, (7)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (8)Cornell University, Ithaca, NY, United States

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