T11D:
The Aleutian-Alaska Arc: Volcanic and Tectonic Processes I Posters

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Session ID#: 12941

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 Terry A Plank, Columbia University, Lamont-Doherty Earth Observatory, Palisades, 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:

Subduction-Related Structure in the Mw 9.2, 1964 Megathrust Rupture Area Offshore Kodiak Island, Alaska (124680)
Anne Krabbenhoeft, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Roland von Huene, Retired, Menlo Park, CA, United States, Dirk Klaeschen, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany and John J. Miller, USGS Colorado Denver, Emeritus, Denver, CO, United States
Geophysical Observations Indicating Mechanisms that Caused the 1946 Unimak Tsunamis (182268)
John J. Miller, US Department of the Interior, U.S. Geological Survey, Emeritus Scientist, Golden, CO, United States, Roland von Huene, Retired, Menlo Park, CA, United States, Peter Dartnell, USGS Pacific Coastal and Marine Science Center, Santa Cruz, United States and Dirk Klaeschen, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
3D map of subduction zone geometry off the Alaska Peninsula (174707)
Harold Kuehn1, Mladen R Nedimovic2, Donna J Shillington3, Anne Becel4, Jiyao Li5, Spahr C Webb4 and Keith E Louden1, (1)Dalhousie University, Halifax, NS, Canada, (2)Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada, (3)Columbia University of New York, Palisades, NY, United States, (4)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (5)Lamont Doherty Earth Observatory of Columbia University, Palisades, NY, United States
Structural and Depositional Evolution of the Stevenson Basin, a Gulf of Alaska Forearc Basin: Insights from Legacy Seismic and Borehole Data (196427)
Rahul Bhattacharya, Auburn University, Auburn, AL, United States, Lee M Liberty, Boise State Univ, Boise, United States, Rafael V Almeida, Yachay Tech University, School of Earth Sciences, Energy and Environment, Urcuqui, Ecuador and Judith Hubbard, Nanyang Technological University, Singapore, Singapore
Widespread imaging of the lower crust, Moho, and upper mantle from Rayleigh waves: A comparison of the Cascadia and Aleutian-Alaska subduction zones (133138)
Matthew M Haney, U.S. Geological Survey Alaska Volcano Observatory, Anchorage, AK, United States, Victor C Tsai, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States and Kevin Michael Ward, University of Arizona, Tucson, AZ, United States
Effects of Flat Slab Subduction on Shear Wave Splitting in Alaska (142523)
Amanda McPherson and Douglas H Christensen, University of Alaska Fairbanks, Fairbanks, AK, United States
Crustal and Mantle Anisotropy beneath Alaska Inferred from Shear-Wave Splitting Analysis (153464)
Haider Hassan Dahm, Fansheng Kong, Stephen S Gao and Kelly Hong Liu, Missouri University of Science and Technology, Geology and Geophysics Program, Rolla, MO, United States
Rayleigh Wave Phase Velocities in Alaska from Ambient Noise Tomography (163625)
Karissa Suzanne Pepin, University of Houston, Houston, United States, Aibing Li, University of Houston, EAS, Houston, TX, United States and Yao Yao, University of Houston, Houston, TX, United States
RUN-UP TO THE 1999 SUB-PLINIAN ERUPTION OF SHISHALDIN VOLCANO UNVEILED USING PETROLOGIC AND SEISMIC APPROACHES (154212)
Daniel J. Rasmussen1, Terry A Plank2, Diana C. Roman3,4, Amanda C Lough5, Pete L Stelling6, Robert J Bodnar7 and Erik H Hauri5, (1)National Museum of Natural History, Smithsonian Institution, Mineral Sciences, Washington, DC, United States, (2)Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, (3)Carnegie Institution for Science, Department of Terrestrial Magnetism, Washington, DC, United States, (4)DTM Carnegie Institution, Washington, DC, United States, (5)Carnegie Institution for Science Washington, Washington, DC, United States, (6)Western Washington University, Geology, Bellingham, WA, United States, (7)Virginia Tech, Blacksburg, VA, United States
Surface Deformation and Source Model at Semisopochnoi Volcano from InSAR and Seismic Analysis During the 2014 and 2015 Seismic Swarms (119136)
Kimberly DeGrandpre, Southern Methodist University, Dallas, TX, United States, Jeremy D Pesicek, USGS Cascades Volcano Observatory, Vancouver, WA, United States and Zhong Lu, Southern Methodist University, Roy M. Huffington Department of Earth Sciences, Dallas, TX, United States
Petrology and geochemistry of three early Holocene eruptions from Makushin volcano, Alaska (168855)
Jessica F Larsen, University of Alaska Fairbanks, Department of Geosciences, Fairbanks, AK, United States and Janet Rose Schaefer, Alaska Division of Geological and Geophysical Surveys, Fairbanks, AK, United States
The evolution of Augustine: linking Pleistocene rhyolite and the overlying dacite (186636)
Patricia A Nadeau1,2, James D Webster2, Brian Monteleone3, Nobumichi Shimizu4 and Beth A Goldoff2, (1)Salem State University, Geological Sciences, Salem, MA, United States, (2)American Museum of Natural History, Earth and Planetary Sciences, New York, NY, United States, (3)Woods Hole Oceanographic Institution, Department of Geology & Geophysics, Woods Hole, United States, (4)Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
From the Slab to the Surface: Origin, Storage, Ascent, and Eruption of Volatile-Bearing Magmas in the Aleutian arc (158915)
Diana C. Roman1, Terry A Plank2, Erik H Hauri1, Daniel J. Rasmussen3, John A Power4, John J Lyons5, Matthew M Haney4, Cynthia A Werner6, Christoph Kern7, Taryn M Lopez8, Pavel E Izbekov8 and Pete L Stelling9, (1)Carnegie Institution for Science, Department of Terrestrial Magnetism, Washington, DC, United States, (2)Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, (3)National Museum of Natural History, Smithsonian Institution, Mineral Sciences, Washington, DC, United States, (4)USGS Alaska Volcano Observatory, Anchorage, United States, (5)Alaska Volcano Observatory Anchorage, USGS, Anchorage, AK, United States, (6)USGS - Contractor, New Plymouth, New Zealand, (7)USGS Cascades Volcano Observatory, Vancouver, WA, United States, (8)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (9)Western Washington University, Geology, Bellingham, WA, United States
Relationships between Microbial Activities and Subduction-related Outgassing and Volatile Flux at Aleutian Arc Volcanoes (184171)
Heather Miller, Michigan State University, East Lansing, MI, United States, 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 and Matthew O Schrenk, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States
Ages and geochemical comparison of coeval plutons and volcanics from the central and eastern Aleutian arc (185832)
Yue Cai, Lamont-Doherty Earth Observatory, Palisades, United States, Peter B Kelemen, Columbia University of New York, Palisades, NY, United States, Steven L Goldstein, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, Gene M Yogodzinski, University of South Carolina, School of Earth-Ocean-Environment, Columbia, United States, Sidney R Hemming, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, Matthew E Rioux, University of California Santa Barbara, Santa Barbara, CA, United States and Emily H. G. Cooperdock, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States
Three-dimensional Numerical Models of the Alaska Subduction-Transform system and the Implications for Mantle Upwelling and Anomalous Volcanism (190266)
Nicole Pham, University of Texas at Austin, Austin, TX, United States, Margarete Ann Jadamec, University of Houston, Dept. of Earth and Atmospheric Sciences, Houston, TX, United States and Kirstie L. Haynie, State University of New York at Buffalo, Department of Geology, Buffalo, NY, United States
Crustal Control of Tholeiitic vs Calc-Alkaline Affinities of the Alaska-Aleutian Arc (176347)
Warren K Lieu, University of Texas at Dallas, Richardson, TX, United States and Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States
Mineralogy and Chemistry of Continental-like Calc-alkaline Plutons on Adak Island in the Oceanic Aleutian arc: Emplacement and Implications for the Eocene History of the Arc (166008)
Suzanne Mahlburg Kay1, Gary P Citron1, Robert W Kay1 and Brian R Jicha2, (1)Cornell University, Ithaca, NY, United States, (2)University of Wisconsin-Madison, Department of Geoscience, Madison, United States
Conditions of Garnet Saturation in Hydrous, Oxidized Arc Basalt - an Experimental Study (120438)
Dawnika L Blatter, USGS Volcano Science Center, Menlo Park, United States, Thomas W Sisson, USGS California Volcano Observatory, Menlo Park, CA, United States and William B Hankins, USGS Volcano Hazards Program Menlo Park, Volcano Science Center, Menlo Park, CA, United States

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