Multidisciplinary and Interdisciplinary(M)
Session Sub-categoryIntersection(IS)
Session IDM-IS03
TitleStructure and deformation in the overlying plate due to subduction and related feedbacks
Short TitleTectonics in subduction zone
Main Convener NameHiroshi Sato
AffiliationEarthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo
Co-Convener 1NameDavid A Okaya
AffiliationUniversity of Southern California
Co-Convener 2NameEh Tan
AffiliationInstitute of Earth Sciences, Academia Sinica
Co-Convener 3NameMasahiro Ishikawa
AffiliationGraduate School of Environment and Information Sciences Yokohama National University
Session LanguageE
ScopeSubduction over time modifies the overriding plate by fractionation, accretion, and tectonic deformation. This can lead to processes such as tectonic shortening (orogeny), regional uplift, weakening by back-arc spreading and volcanism, basin formation, and/or destabilization of the lithosphere. In turn, the composition, strength, and morphology of the overlying plate, which may be the product of a long geological history and have significant along-strike variations, can affect current large-scale subduction dynamics such as slab dip, and ultimately broad-scale plate kinematics in two and three dimensions. Examples of geological settings that bear witness to these processes are found along the Pacific Rim, including Japanese arcs, Taiwan, Hikurangi, northwestern North America, and Tethys margin, including Himalaya and the Mediterranean mobile belt. We seek contributions from all geoscience disciplines that document the structure and tectonic evolution of overlying plate deformation and their feedbacks onto subduction processes. We welcome studies on topics such as: geologic and tectonic geomorphological deformation of the overlying plate and its relation to the subduction; geodetic deformation of the overlying plate; active and passive imaging of the overlying plate and crustal structure; rheological features obtained by laboratory and earthquake seismology; basin development and mountain building processes; numerical geodynamical modeling of overlying plate deformation; and backarc opening proceses. Comparisons of the Nankai and Japan Trench subduction systems to other global subduction zones are of particular interest. This session is supported by ILP (International Lithosphere Program).
Presentation FormatOral and Poster presentation