TY - JOUR
T1 - 3D anisotropic structure of the Japan subduction zone
AU - Wang, Zewei
AU - Zhao, Dapeng
N1 - Funding Information:
This work was supported by a research grant (no. 19H01996) from the Japan Society for the Promotion of Science to D.Z. and a grant (no. 41904045) from the National Natural Science Foundation of China to Z.W.
Publisher Copyright:
Copyright © 2021 The Authors, some rights reserved.
PY - 2021/1/20
Y1 - 2021/1/20
N2 - How mantle materials flow and how intraslab fabrics align in subduction zones are two essential issues for clarifying material recycling between Earth's interior and surface. Investigating seismic anisotropy is one of a few viable technologies that can directly answer these questions. However, the detailed anisotropic structure of subduction zones is still unclear. Under a general hexagonal symmetry anisotropy assumption, we develop a tomographic method to determine a high-resolution three-dimensional (3D) P wave anisotropic model of the Japan subduction zone by inverting 1, 184, 018 travel time data of local and teleseismic events. As a result, the 3D anisotropic structure in and around the dipping Pacific slab is firstly revealed. Our results show that slab deformation plays an important role in both mantle flow and intraslab fabric, and the widely observed trench-parallel anisotropy in the forearc is related to the intraslab deformation during the outer-rise yielding of the subducting plate.
AB - How mantle materials flow and how intraslab fabrics align in subduction zones are two essential issues for clarifying material recycling between Earth's interior and surface. Investigating seismic anisotropy is one of a few viable technologies that can directly answer these questions. However, the detailed anisotropic structure of subduction zones is still unclear. Under a general hexagonal symmetry anisotropy assumption, we develop a tomographic method to determine a high-resolution three-dimensional (3D) P wave anisotropic model of the Japan subduction zone by inverting 1, 184, 018 travel time data of local and teleseismic events. As a result, the 3D anisotropic structure in and around the dipping Pacific slab is firstly revealed. Our results show that slab deformation plays an important role in both mantle flow and intraslab fabric, and the widely observed trench-parallel anisotropy in the forearc is related to the intraslab deformation during the outer-rise yielding of the subducting plate.
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U2 - 10.1126/sciadv.abc9620
DO - 10.1126/sciadv.abc9620
M3 - Article
C2 - 33523923
AN - SCOPUS:85099855252
SN - 2375-2548
VL - 7
JO - Science advances
JF - Science advances
IS - 4
M1 - eabc9620
ER -