Session Outline
| Solid Earth Sciences (S) | ||||
|---|---|---|---|---|
| Session Sub-category | Complex & General (CG) | |||
| Session ID | S-CG55 | |||
| Title | Oceanic plate as inputs to subduction zone and the subduction initiation | |||
| Short Title | Subduction inputs/subduction initiation | |||
| Main Convener | Name | Yuya Akamatsu | ||
| Affiliation | Japan Agency for Marine-Earth Science and Technology | |||
| Co-Convener 1 | Name | Osamu Ishizuka | ||
| Affiliation | Geological Survey of Japan, AIST | |||
| Co-Convener 2 | Name | Naoto Hirano | ||
| Affiliation | Center for Northeast Asian Studies, Tohoku University | |||
| Co-Convener 3 | Name | Kenichiro Tani | ||
| Affiliation | Department of Science, National Museum of Nature and Science | |||
| Co-Convener 4 | Name | Gou Fujie | ||
| Affiliation | Japan Agency for Marine-Earth Science and Technology | |||
| Co-Convener 5 | Name | Jonny Wu | ||
| Affiliation | University of Arizona | |||
| Co-Convener 6 | Name | Takanori Kagoshima | ||
| Affiliation | University of Toyama | |||
| Co-Convener 7 | Name | Jin Zhang | ||
| Affiliation | Texas A&M University College Station | |||
| Co-Convener 8 | Name | Julia Ribeiro | ||
| Affiliation | Guangzhou Institute of Geochemistry, Chinese Academy of Sciences | |||
| Session Language | E | |||
| Scope |
This session focuses on two main topics: the oceanic plate as inputs to the subduction zone and the processes that initiate subduction.
Subduction of oceanic plate drives various geodynamic phenomena, such as magma generation and fault formation, triggering volcanic and earthquake activity at subduction zones. Scales and distributions of such subduction zone-phenomena are controlled by physicochemical properties of subducting oceanic plates. In addition, oceanic plate-subduction processes transport surface materials such as water and carbon into the deep interior of Earth, playing an important role in global geochemical cycles. Physicochemical properties of oceanic plates as "subduction inputs" reflect their evolutionary histories from their formation at mid-ocean ridges until subduction at trenches. These characteristics are further modified by processes associated with plate bending prior to subduction, including fault development and petit-spot volcanism.
Subduction initiation and the subsequent development of oceanic island arcs are poorly understood and remain an important unresolved problem in plate tectonics. Recent efforts to investigate geological record of subduction initiation along oceanic arcs and ophiolite have significantly improved understanding of processes associated with subduction initiation. This has also prompted extensive study utilizing tomography and numerical modeling to investigate requirements for the plate to subduct, and reconstruct tectonics for subduction initiation.
We welcome contributions from a broad range of earth science (geophysics, geochemistry, geology, petrology, drilling science, and so on) discussing topics related to the nature of the subduction initiation of oceanic plate and their role as inputs to subduction zones.
|
|||
| Session Format | Orals and Posters session | |||