T22C:
Characterization of Oceanic Crust: Ridge to Trench Evolution II

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Session ID#: 15998

Session Description:
Although the nature of oceanic crust has been studied for decades, significant gaps remain in our ability to characterize crustal structure based on spreading rate, age, and region. The intent of this session is to host a compilation of research on the nature of oceanic crust across the full range of crustal ages and spreading rates incorporating geophysical, drilling and dredge or submersible sample data. We hope to attract work from various crustal ages and spreading rates, as well as data types, so that we might begin to build a systematic characterization of crustal geophysical properties. We encourage submissions focused on topics such as layer 2 and 3, lower crustal dipping reflectors (LCDRs), abyssal hill spacing, deep crustal structure, and crustal thickness.
Primary Convener:  Robert Reece, Texas A&M University, Geology and Geophysics, College Station, TX, United States
Conveners:  Gail Lynn Christeson, UTIG, Austin, United States and Richard L Carlson, Texas A&M University, Geology & Geophysics, College Station, TX, United States
Chairs:  Gail Lynn Christeson, UTIG, Austin, United States and Robert Reece, Texas A&M University, Geology and Geophysics, College Station, TX, United States
OSPA Liaison:  Richard L Carlson, Texas A&M University, Geology & Geophysics, College Station, TX, United States

Cross-Listed:
  • MR - Mineral and Rock Physics
  • OS - Ocean Sciences
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

3025 Marine seismics [MARINE GEOLOGY AND GEOPHYSICS]
3036 Ocean drilling [MARINE GEOLOGY AND GEOPHYSICS]
3075 Submarine tectonics and volcanism [MARINE GEOLOGY AND GEOPHYSICS]
7220 Oceanic crust [SEISMOLOGY]

Abstracts Submitted to this Session:

OSCAR – Oceanographic and Seismic Characterisation of heat dissipation and alteration by hydrothermal fluids at an Axial Ridge (Invited) (126036)
Richard W Hobbs, University of Durham, Department of Earth Sciences, Durham, United Kingdom and The OSCAR project team
3D crustal structure beneath the Costa Rica Rift from seismic tomography: insight into magmatic activity (156995)
Ling Zhang, University College London, London, United Kingdom, Vincent C H Tong, University College London, Arena Centre for Research-based Education, Department of Earth Sciences, London, United Kingdom, Dean J Wilson, University of Durham, Earth Sciences, Durham, United Kingdom, Richard W Hobbs, University of Durham, Department of Earth Sciences, Durham, United Kingdom, Gavin Haughton, National Oceanography Centre, Soton, Southampton, United Kingdom; National Oceanography Center, Soton, Southampton, United Kingdom and Bramley J Murton, National Oceanography Centre, Southampton, United Kingdom
Seismic reflection imaging of the Juan de Fuca plate from ridge to trench: new constraints on the distribution of faulting and evolution of the crust prior to subduction (Invited) (119227)
Shuoshuo Han, University of Texas Institute for Geophysics, Austin, United States, Suzanne M Carbotte, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Juan Pablo Canales, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Mladen R Nedimovic, Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada, Helene Delphine Carton, Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France and James C Gibson, Lamont -Doherty Earth Observatory, Palisades, United States
Constraining the velocity structure of the Juan de Fuca plate from ridge to trench with a 2D tomographic study of wide angle OBS data (184238)
Bridgit Boulahanis, Columbia University of New York, Palisades, NY, United States, Juan Pablo Canales, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Suzanne M Carbotte, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Helene Delphine Carton, Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France, Shuoshuo Han, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States and Mladen R Nedimovic, Dalhousie University, Department of Earth and Environmental Sciences, Halifax, NS, Canada
Seismic signatures of up- and down-going hydrothermal pathways along the East Pacific Rise 9ºN (128265)
Milena Marjanovic1, Nobuaki Fuji2, Satish Chandra Singh1 and Thomas Belahi1, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Université de Paris, Institut de physique du globe de Paris, Paris, France
Mid-ocean ridges produced thicker crust in the Jurassic than in Recent times (121762)
Harm J Van Avendonk, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States, Jennifer Harding, University of Texas at Austin, Austin, TX, United States, Joshua Kane Davis, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Lawrence A Lawver, The University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
Spatial variations in the nature of the oceanic plate in the northwestern Pacific margin (170571)
Gou Fujie1, Shuichi Kodaira2, Taro Shirai1, Anke Dannowski3, Martin Thorwart4, Ingo Grevemeyer3, Jason P Morgan5 and Seiichi Miura1, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (4)Christian-Albrechts-Universität zu Kiel, Kiel, Germany, (5)Royal Holloway University of London, Egham, TW20, United Kingdom
The Evolution of Slow-Intermediate Oceanic Crust in the South Atlantic: A Continuous Seismic Reflection Transect (139567)
Robert Reece, Texas A&M University, Geology and Geophysics, College Station, TX, United States, Gail Lynn Christeson, UTIG, Austin, United States, Richard L Carlson, Texas A&M University, Geology & Geophysics, College Station, TX, United States and Justin David Estep, University of Arkansas, Fayetteville, United States

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