The Geometry of the Subducted Slab Beneath Sumatra Revealed by Regional and Teleseismic Traveltime Tomography
文献类型：期刊论文
| 作者 | Liu, Shaolin1,2,3,6; Suardi, Iman5; Xu, Xiwei2; Yang, Shuxin2; Tong, Ping1,3,4 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2021 |
| 卷号 | 126期号:1页码:29 |
| 关键词 | Seismic tomography Indo‐ Australian plate Sunda plate Sumatra Subduction |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2020JB020169 |
| 英文摘要 | The geometry of the subducted Indo-Australian plate beneath Sumatra is still controversial because of the historical lack of a dense seismic network. Since 2005, Indonesia has been establishing a relatively dense seismic network for real time earthquake monitoring and tsunami warning. The seismic data accumulated by this network make it possible to achieve high-resolution tomographic images of the velocity structure beneath Sumatra by using eikonal equation-based seismic tomography method. Our P-wave tomographic images derived from regional seismic and teleseismic traveltime data demonstrate that the slab in the upper mantle generally follows the strike of the trench and the orientation of the volcanic arc. Additionally, the slab exhibits a sinusoidal shape with a low degree of curvature. Our tomographic results also reveal that the maximum penetration depth of the subducted slab increases from the north to south. The subducted slab beneath the northern tip of Sumatra barely arrives at the 410-km discontinuity, while the slab in the south penetrates to a depth of at least 660 km. Our inversion further indicates that the subducted slab is characterized by a tear at a depth of 120 km between 0 degrees N and 2 degrees N, which may be closely related to the supervolcanic eruption of the Toba caldera in northern Sumatra during the Pleistocene. Moreover, we report that the dip of the subducted slab varies significantly (i.e., dramatically decreases) across the Sunda Strait; therefore, we infer that another subvertical slab tear exists beneath the Sunda Strait. |
| 资助项目 | National Research Foundation Singapore ; Singapore Ministry of Education under the Research Centers of Excellence Initiative[04MNS001913A620] ; Singapore Ministry of Education under the Research Centers of Excellence Initiative[04MNS001953A620] ; MOE AcRF Tier-1 Grant[04MNP000559C230] ; National Key R&D Program of China[2018YFC1503403] ; National Natural Science Foundation of China[U1839207] ; National Institute of Natural Hazards, Ministry of Emergency Management of China[ZDJ2019-18] ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution[SKL-K201804] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000617378900019 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Research Foundation Singapore ; National Research Foundation Singapore ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; MOE AcRF Tier-1 Grant ; MOE AcRF Tier-1 Grant ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; National Research Foundation Singapore ; National Research Foundation Singapore ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; MOE AcRF Tier-1 Grant ; MOE AcRF Tier-1 Grant ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; National Research Foundation Singapore ; National Research Foundation Singapore ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; MOE AcRF Tier-1 Grant ; MOE AcRF Tier-1 Grant ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; National Research Foundation Singapore ; National Research Foundation Singapore ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; Singapore Ministry of Education under the Research Centers of Excellence Initiative ; MOE AcRF Tier-1 Grant ; MOE AcRF Tier-1 Grant ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution ; Open Fund Project of the State Key Laboratory of Lithospheric Evolution |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100099]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Tong, Ping |
| 作者单位 | 1.Nanyang Technol Univ, Earth Observ Singapore, 50 Nanyang Ave, Singapore, Singapore 2.Minist Emergency Management China, Natl Inst Nat Hazards, Beijing, Peoples R China 3.Nanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore, Singapore 4.Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 6.State Key Lab Lithospher Evolut Inst Geol & Geoph, Banten, Indonesia |
| 推荐引用方式 GB/T 7714 | Liu, Shaolin,Suardi, Iman,Xu, Xiwei,et al. The Geometry of the Subducted Slab Beneath Sumatra Revealed by Regional and Teleseismic Traveltime Tomography[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(1):29. |
| APA | Liu, Shaolin,Suardi, Iman,Xu, Xiwei,Yang, Shuxin,&Tong, Ping.(2021).The Geometry of the Subducted Slab Beneath Sumatra Revealed by Regional and Teleseismic Traveltime Tomography.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(1),29. |
| MLA | Liu, Shaolin,et al."The Geometry of the Subducted Slab Beneath Sumatra Revealed by Regional and Teleseismic Traveltime Tomography".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.1(2021):29. |
入库方式： OAI收割
来源：地质与地球物理研究所
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