GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 56
Sunday, 22 October 2017: 1:30 PM-5:30 PM
Tahoma 5 (The Conference Center)

T226. New Perspectives on Processes of Subduction Initiation and Termination

GSA Structural Geology and Tectonics Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; GSA Geophysics Division
Sarah Roeske, Nancy Riggs, Susanne Buiter and Douwe van Hinsenberg, Advocates
 
1:30 PM
Introductory Remarks
1:35 PM
A SYNTHESIS OF RECENT RESULTS FROM GEODYNAMIC MODELS OF SUBDUCTION INITIATION AND TERMINATION (Invited Presentation)
BILLEN, Magali I., Department of Earth and Planetary Sciences, University of California, One Shields Avenue, Davis, CA 95616, mibillen@ucdavis.edu
1:55 PM
EOCENE INITIATION OF THE CASCADIA SUBDUCTION ZONE: A SECOND EXAMPLE OF PLUME-INDUCED SUBDUCTION INITIATION? (Invited Presentation)
STERN, Robert J., Department of Geosciences, University of Texas Dallas, Richardson, TX 75080, rjstern@utdallas.edu
 
2:15 PM
Discussion
2:25 PM
CONSTRAINTS ON SUBDUCTION INITIATION FROM PROTOLITH AND METAMORPHIC AGES OF METAMORPHIC SOLES
ENCARNACION, John, Department of Earth and Atmospheric Sciences, Saint Louis University, 3642 Lindell Blvd, St. Louis, MO 63108 and KEENAN, Timothy E., Surdex Corporation, Chesterfield, MO 63005, encarnjp@slu.edu
2:40 PM
MANTLE DEFORMATION RECORDING SUBDUCTION INITIATION, RED HILLS, NEW ZEALAND
STEWART, Eric D.1, NEWMAN, Julie1, TIKOFF, Basil2, MILLER, Brent1, LAMB, William M.1 and GERMAN, Lindsey1, (1)Department of Geology and Geophysics, Texas A&M University, College Station, TX 77843, (2)Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton St, Madison, WI 53706, newman@geo.tamu.edu
2:55 PM
FORE-ARC BASALT TO BONINITE MAGMATISM: CHARACTERIZING THE TRANSITION FROM DECOMPRESSION TO FLUID FLUX MELTING AFTER SUBDUCTION INITIATION
COULTHARD Jr., Daniel A.1, REAGAN, Mark K.1, ALMEEV, Renat2, PEARCE, Julian A.3, RYAN, Jeffrey4, SAKUYAMA, Tetsuya5, SHERVAIS, J.W.6 and SHIMIZU, Kenji7, (1)Geoscience, University of Iowa, Iowa City, IA 52242, (2)Institüt für Mineralogie, Leibniz Universität Hannover, Hannover, 30167, Germany, (3)Cardiff U, Cardiff, CF10 3AT, United Kingdom, (4)School of Geosciences, University of South Florida, 4202 East Fowler Ave, Tampa, FL 33620, (5)Department of Science, Osaka University, Sumiyoshi-ku, Osaka, 558-8585, Japan, (6)Department of Geology, Utah State University, Logan, UT 84322-4505, (7)JAMSTEC, Nankoku, Kochi, 783-8502, Japan, daniel-coulthard@uiowa.edu
 
3:10 PM
Coffee Break
3:25 PM
PERMIAN MAGMATISM IN THE NORTHERN MOJAVE REGION AND CONSTRAINTS ON THE TIMING AND TECTONICS OF SUBDUCTION INITIATION ALONG THE SOUTHWEST LAURENTIAN MARGIN (Invited Presentation)
CECIL, M. Robinson, Department of Geological Sciences, California State University Northridge, Northridge, CA 91130-8266, FERRER, Mary Ann, Department of Geological Sciences, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA 91330-8266, RIGGS, Nancy R., Geology, School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011-4099 and MARSAGLIA, Kathleen, Dept of Geological Sciences, California State University, 18111 Nordhoff St, Northridge, CA 91330-8266, robinson.cecil@csun.edu
3:45 PM
SEDIMENTATION AND GEOCHRONOLOGY OF PERMIAN STRATA, INYO MOUNTAINS, CA, AND RELATION TO ONSET OF SUBDUCTION
LODES, Emma, School of Earth Sciences and Environmental Sustainability, Geology, Northern Arizona University, 2650 Kona Trail, Flagstaff, AZ 86005, RIGGS, Nancy, School of Earth Sciences and Environmental Sustainability, Northern Arizona University, PO Box 4099, Flagstaff, AZ 86011-4099, STONE, Paul, U.S. Geol Survey, 345 Middlefield Road, MS 973, Menlo Park, CA 94025 and REYNOLDS, Stephen J., Arizona State University, Tempe, AZ 85287, ebl32@nau.edu
4:00 PM
SOUTHWEST LAURENTIAN LOWER-MIDDLE TRIASSIC SEDIMENTARY STRATA AND THE RECORD OF EARLIEST CORDILLERAN ARC MAGMATISM
RIGGS, Nancy R., Geology, School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011-4099, REYNOLDS, Stephen J., School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-1404, CECIL, M. Robinson, Department of Geological Sciences, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA 91330, SANCHEZ, Taylor B., Pioneer Natural Resources, 5205 N. O'Connor Blvd., Suite 200, Irving, TX 75039 and BARTH, Andrew P., Department of Geology, IUPUI, 723 West Michigan Street, SL118, Indianapolis, IN 46202-5191, nancy.riggs@nau.edu
4:15 PM
MANTLE INFLUENCES ON MIOCENE MAGMATISM IN CENTRAL PANAMA
FOWLER III, Gary D., Earth, Ocean and Atmospheric Sciences, Florida State University, 909 Antarctic Way, Carraway Building, Tallahassee, FL 32306 and FARRIS, David W., Geology, Washington and Lee University, 204 West Washington Street, Lexington, VA 24450, gdfowler@fsu.edu
4:30 PM
SYNCHRONOUS LATE MIOCENE ARC-CONTINENT COLLISION ACROSS TIMOR: FIELD CONSTRAINTS ON PLATE BOUNDARY REORGANIZATION
TATE, Garrett W.1, MCQUARRIE, Nadine2, TIRANDA, Herwin3, VAN HINSBERGEN, Douwe J.J.4, HARRIS, Ron5, ZACHARIASSE, Willem Jan4, FELLIN, Maria Giuditta6, REINERS, Peter W.7 and WILLETT, Sean D.6, (1)Department of Earth and Environmental Sciences, Vanderbilt University, 5726 Stevenson Center, Nashville, TN 37240, (2)Department of Geology and Environmental Science, University of Pittsburgh, Pittsburgh, PA 15260-3332, (3)Bandung Institute of Technology, Bandung, Indonesia, (4)Earth Sciences, Utrecht University, Heidelberglaan 2, Utrecht, 3584 CS, Netherlands, (5)Department of Geological Sciences, Brigham Young University, S-389 ESC, Provo, UT 84602, (6)Geologisches Institut, ETH Zürich, Zürich, 8092, Switzerland, (7)Department of Geosciences, University of Arizona, 1040 E. 4th St., Tucson, AZ 85721, g.tate@vanderbilt.edu
4:45 PM
MAGMATIC EVIDENCE FOR LOCALIZED LITHOSPHERIC DELAMINATION RESULTING FROM CONTINENTAL COLLISION IN THE PAMIR-TIBET OROGEN
CHAPMAN, James B.1, SCOGGIN, Shane1, KAPP, Paul1, CARRAPA, Barbara1, DUCEA, Mihai N.2, WORTHINGTON, James1, OIMAHMADOV, Ilhomjon3 and GADOEV, Mustafo3, (1)Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, AZ 85721, (2)Department of Geosciences, University of Arizona, Tucson, AZ 85721, (3)Institute of Geology, Earthquake Engineering and Seismology, Tajikistan Academy of Sciences, Dushanbe, jaychapman@email.arizona.edu
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