GSA Connects 2024 Meeting in Anaheim, California

Session No. 242
Wednesday, 25 September 2024: 8:00 AM-12:00 PM
304B (Anaheim Convention Center)

T175. Fluids and Deformation during Subduction from the Trench to the Subarc

GSA Structural Geology and Tectonics Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; GSA Geophysics and Geodynamics Division; GSA Geochronology Division

 

Anna Ledeczi, Justine Grabiec, Jason Ott and Cailey Condit, Advocates
Paper #
Start Time
 
8:00 AM
Introductory Remarks
8:05 AM
THE CONSTANT-STRENGTH MODEL OF OVERPRESSURED ACCRETIONARY WEDGES: PRESENT-DAY STRENGTH-DEPTH OBSERVATIONS TO 14KM IN THE WESTERN TAIWAN ACCRETIONARY ORIGEN
YANG, Yi-Rong1, SUPPE, John2, JOHNSON, Kaj3, WANG, Tian-Tian1, YEH, En-Chao4 and JENG, Fu-Shu1, (1)Department of Civil Engineering, National Taiwan University, Taipei, 10617, Taiwan, (2)Department of Earth and Atmospheric Sciences, University of Houston, 3507 Cullen Blvd, SR1 #312, Houston, TX 77204-5007; Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, P.O. Box 13-318, Taipei, 10617, Taiwan, (3)Department Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405-1405, (4)Department of Earth Sciences, National Taiwan Normal University, Taipei, 11677, Taiwan
8:20 AM
WHY DO SUBDUCTION THRUSTS LOCK? EVOLVING EFFECTIVE GRAIN SIZES MODULATE CREEP RATES THROUGH PRESSURE SOLUTION (Invited Presentation)
PHILLIPS, Noah1, ROWE, Christie D.2, KIRKPATRICK, James2 and MARINO, Dana2, (1)Lakehead University, Department of Geology, 955 Oliver Rd, Thunder Bay, ON P7B5E1, Canada, (2)Department of Earth and Planetary Sciences, McGill University, 3450 University Street, Montréal, QC H3A 0E8, Canada
8:40 AM
DENSE VEIN ARRAYS IN SUBDUCTION MELANGE EXHUMED FROM THE SEISMOGENIC ZONE: EVIDENCE FOR DIFFUSION OR ADVECTION?
FISHER, Donald1, HIRTH, Greg2, HOOKER, John3, SMYE, Andrew J.4, CHEN, Tsai-Wei1, YOUNGQUIST, Leah4 and LLOYD, Max K.5, (1)Department of Geosciences, The Pennsylvania State University, University Park, PA 16802, (2)Department of Earth, Environmental and Planetary Sciences, Brown University, Box 1846, 324 Brook St, Providence, RI 02912, (3)School of Mathematics, Science, and Engineering, University of the Incarnate Word, San Antonio, TX 78209, (4)Department of Geosciences, The Pennsylvania State University, 305 Deike Building, University Park, PA 16802, (5)Department of Geosciences, The Pennsylvania State University, Deike Building, University Park, PA 16802
Handouts
  • GSA-2024.pdf (8.0 MB)
  • Fisher and Hirth, 2024.pdf (3.1 MB)
  • Geochem Geophys Geosyst - 2024 - Chen - Temperatures of Vein Formation Associated With Plate Interface Deformation (2).pdf (4.4 MB)
  • Geochem Geophys Geosyst - 2024 - Chen - Quantifying Interseismic Volume Strain from Chemical Mass‐Balance Analysis in (2).pdf (5.9 MB)
  • 8:55 AM
    VEINS IN THE OLYMPIC SUBDUCTION COMPLEX: IMPLICATIONS FOR THE STRESS FIELD IN THE PALEO-CASCADIA ACCRETIONARY WEDGE
    CHEN, Tsai-Wei, TOBIN, Harold and LEDECZI, Anna, Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195
     
    9:10 AM
    Discussion
     
    9:30 AM
    Break
    9:45 AM
    MICROSTRUCTURAL EVIDENCE OF DISLOCATION CREEP AND DIFFUSION ACCOMMODATED DEFORMATION OF GLAUCOPHANE IN A NATURALLY DEFORMED LAWSONITE BLUESCHIST
    OTT, Jason1, CONDIT, Cailey1, PEC, Matej2 and JOURNAUX, Baptiste1, (1)Department of Earth and Space Sciences, University of Washington, 819 NW Market St, 4000 15th Avenue NE, Seattle, WA 98107, (2)Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, 54-720, Cambridge, MA 02139
    10:00 AM
    FLUIDS FROM THE SLAB: THE HISTORY OF METAMORPHISM AND FLUID FLOW IN SUBDUCTED METABASALTS OF THE CATALINA SCHIST RECORDED BY EPIDOTE MINERALS
    LINDQUIST, Peter, Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, CONDIT, Cailey, Department of Earth and Space Sciences, University of Washington, 819 NW Market St, 4000 15th Avenue NE, Seattle, WA 98107, HOOVER, Will, University of Washington and GUEVARA, Victor, Geology Department, Amherst College, 11 Barrett Hill Dr, Amherst, MA 01002
    10:15 AM
    APATITE U-Pb PETROCHRONOLOGY RECORDS SUBDUCTION-RELATED DEFORMATION AND FLUID FLOW IN THE CATALINA SCHIST, CA
    FERRELL, Megan1, ODLUM, Margaret1, POULAKI, Eirini2 and CONDIT, Cailey3, (1)Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, (2)Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL 33146, (3)Department of Earth and Space Sciences, University of Washington, 819 NW Market St, 4000 15th Avenue NE, Seattle, WA 98107
    10:30 AM
    SIGNIFICANCE OF FLUIDS ON POTENTIAL SLOW SLIP AND TREMOR SOURCES: INVESTIGATING SERPENTINITE RHEOLOGICAL EVOLUTION IN THE CONDREY MOUNTAIN SCHIST, NORTHERN CALIFORNIA (Invited Presentation)
    TEWKSBURY-CHRISTLE, Carolyn, Geosciences Department, Fort Lewis College, 1000 Rim Dr., Durango, CO 81301 and BEHR, Whitney, Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, Zurich, Zurich 8092, Switzerland
    10:50 AM
    LOCALIZED INCIPIENT GRANULITE FACIES ASSEMBLAGE FORMED VIA SUBSOLIDUS METASOMATISM BY HYPERSALINE FLUIDS IN A LOW ANGLE SUBDUCTION SETTING, CEMETERY RIDGE, SW ARIZONA, USA
    EPSTEIN, Gabe, Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, Miami, FL 33149; Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, HAXEL, Gordon B., U.S. Geological Survey, Flagstaff, AZ 86001; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, 625 S. Knoles Dr., Flagstaff, AZ 86011, WITTKE, James H., Geology Program, School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011, CONDIT, Cailey, Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195 and JACOBSON, Carl, Earth & Space Sciences, West Chester University of Pennsylvania, West Chester, PA 19383; Geological & Atmospheric Sciences, Iowa State University, Ames, IA 50011
     
    11:05 AM
    Discussion
     
    11:25 AM
    Concluding Remarks
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