T14C:
The Aleutian-Alaska Arc: Volcanic and Tectonic Processes II

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Session ID#: 16642

Session Description:
The Aleutian-Alaska arc has seen a recent explosion of research motivated by coordinated programs such as GeoPrisms, EarthScope and The Alaska Volcano Observatory. In this session we hope to bring together new observations and insights into the active tectonic and magmatic processes and evolution of the Aleutian-Alaska subduction zone, with comparisons to subduction zones world-wide. Especially encouraged are presentations that combine geological, geophysical and geochemical datasets, as well as geodynamic models and laboratory experiments spanning major portions of the subduction system - from the trench outer rise to the megathrust, from the plate coupling transition zone to the regions of fluid and melt production, and from the mantle to surface volcanism.
Primary Convener:  Aaron Wech, U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, United States
Conveners:  Terry A Plank, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, John A Power, Alaska Volcano Observatory, Anchorage, AK, United States and Donna J Shillington, Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States
Chairs:  Donna J Shillington, Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, John A Power, Alaska Volcano Observatory, Anchorage, AK, United States and Aaron Wech, U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, United States
OSPA Liaison:  Aaron Wech, U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, United States
Co-Organized with:
Volcanology, Geochemistry and Petrology, and Volcanology, Geochemistry and Petrology

Cross-Listed:
  • S - Seismology

Proposed Co-Organized Session with:
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1037 Magma genesis and partial melting [GEOCHEMISTRY]
7280 Volcano seismology [SEISMOLOGY]
8178 Tectonics and magmatism [TECTONOPHYSICS]
8413 Subduction zone processes [VOLCANOLOGY]

Abstracts Submitted to this Session:

Physical properties and fluids along the Aleutian Megathrust: Insights from the integration of laboratory experiments and regional geophysical surveys (Invited) (122085)
Demian M Saffer, Penn State University, Department of Geosciences, University Park, PA, United States, Jiyao Li, Lamont Doherty Earth Observatory of Columbia University, Palisades, NY, United States, Donna J Shillington, Columbia University of New York, Palisades, NY, United States, Peter Miller, Pennsylvania State University Main Campus, University Park, PA, United States, Geoffrey A Abers, Cornell University, Ithaca, NY, United States, Anne Becel, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Katie M Keranen, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States
Megathrust splay faults, forearc basins, and segment boundaries related to the Kodiak Islands segment of the Alaska subduction zone (194733)
Marlon Dale Ramos, Boise State University, Boise, ID, United States and Lee M Liberty, Boise State Univ, Boise, United States
Quantifying subduction erosion and the northward migration of volcanism in the central Aleutian arc (187806)
Brian R Jicha, University of Wisconsin-Madison, Department of Geoscience, Madison, United States, Suzanne Mahlburg Kay, Cornell University, Ithaca, NY, United States and Allen J Schaen, University of Arizona, Geosciences, Tucson, United States
Subduction geometry beneath south-central Alaska and its relationship to volcanism (139751)
Robert Martin-Short, University of California Berkeley, Berkeley, CA, United States, Richard M Allen, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, United States and Ian D Bastow, Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom
Aftershock productivity as a potential indicator of the style of stress accumulation on volcanoes of Alaska and the Aleutian Islands (190591)
Ricardo GarzaGiron, University of California Santa Cruz, Santa Cruz, CA, United States, Emily E Brodsky, University of California Santa Cruz, Department of Earth and Planetary Sciences, Santa Cruz, CA, United States and Stephanie G Prejean, Alaska Volcano Observatory Fairbanks, Fairbanks, AK, United States
Sr Isotopes in Western Aleutian Seafloor Lavas: Implications for the Source of Fluids and Geochemical Decoupling of Trace Metals from Water (132965)
Gene M Yogodzinski1, Peter B Kelemen2, Kaj Hoernle3, Shaun T Brown4, Jeffrey D. Vervoort5, Maxim Portnyagin3 and Kenneth W W Sims6, (1)University of South Carolina, School of Earth-Ocean-Environment, Columbia, United States, (2)Columbia University of New York, Palisades, NY, United States, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (4)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (5)Washington State University, School of the Environment, Pullman, WA, United States, (6)University of Wyoming, Geology & Geophysics, Laramie, United States
Along-arc trends in volatile composition within the Aleutian Arc with implications for volatile cycling (195134)
Taryn M Lopez, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, Tobias P Fischer, University of California, Santa Barbara, Santa Barbara, United States, Andrea Luca Rizzo, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, Italy, Cynthia A Werner, USGS - Contractor, New Plymouth, New Zealand and Christoph Kern, USGS Cascades Volcano Observatory, Vancouver, WA, United States
Experimental and natural constraints on the generation of calc-alkaline volcanic rocks in the Western Aleutian arc (Invited) (121805)
Elizabeth Cottrell1, Katherine A Kelley2, Elizabeth Grant3,4, Michelle L Coombs5 and Mattia Pistone4, (1)Smithsonian Institution, National Museum of Natural History, Washington, United States, (2)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (3)University of Rhode Island, Narragansett, RI, United States, (4)National Museum of Natural History, Smithsonian Institution, Department of Mineral Sciences, Washington, DC, United States, (5)Alaska Volcano Observatory Fairbanks, Fairbanks, United States

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