Oceanic Plateau and Subduction Zone Jump: Two-Dimensional Thermo-Mechanical Modeling
文献类型：期刊论文
| 作者 | Yan, Zhiyong4,5; Chen, Lin1; Xiong, Xiong2; Wan, Bo1; Xu, Houze3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 126期号:7页码:18 |
| 关键词 | depletion lithosphere mantle oceanic plateau rheology subduction zone |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2021JB021855 |
| 英文摘要 | Oceanic plateaus are characterized by overthickened crust and rheologically strong and chemically depleted mantle root with respect to normal oceanic lithosphere. The buoyant nature makes them have a great potential to resist subduction and initiate a new subduction zone behind the plateaus, yet the geodynamic process remains enigmatic. Here, we use 2D thermo-mechanical modeling method to investigate the role of an oceanic plateau in subduction zone reorganization. We systematically examine the rheological strength and compositional density of oceanic plateau mantle and the size of oceanic plateau. Three distinct subduction styles are observed: (a) steep subduction without subduction zone reorganization, favored by a small-sized (<= 150 km) or lowly depleted oceanic plateau; (b) breakoff of subducting slab followed by flat-slab subduction, which is conditional on a moderate-sized (>= 300 km) oceanic plateau with high degree depletion but relatively low strength; and (c) initiation of a new subduction zone behind the plateau (subduction zone jump), facilitated by a moderate-sized oceanic plateau with a strongly depleted mantle root. The geodynamic results demonstrate that the overriding lithosphere undergoes a tectonic force switch from compression to tension in similar to 5 Myr as the subduction zone is reorganized. This can be reflected in the crustal deformation of the overriding plate and used as an indicator to identify past subduction zone jumps. The spatial relationship predicted by the subduction zone jump models explains the Jurassic closure event of the accretion on southern Qiangtang at similar to 175 Ma and the intraoceanic infant arc magmatism in the Meso-Tethys at similar to 165 Ma. |
| WOS关键词 | LARGE IGNEOUS PROVINCES ; CONTINENTAL MARGINS ; LESSER CAUCASUS ; ARMENIAN BLOCK ; CENTRAL TIBET ; ISLAND ARCS ; EVOLUTION ; INITIATION ; ACCRETION ; MANTLE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000678880700019 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101936]  |
| 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 | Chen, Lin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.China Univ Geosci, Inst Geophys & Geomat, Wuhan, Peoples R China 3.Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, State Key Lab Geodesy & Earths Dynam, Wuhan, Peoples R China 4.Huazhong Univ Sci & Technol, PGMF, Wuhan, Peoples R China 5.Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Phys Quant Measurement, Hubei Key Lab Gravitat & Quantum Phys, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Zhiyong,Chen, Lin,Xiong, Xiong,et al. Oceanic Plateau and Subduction Zone Jump: Two-Dimensional Thermo-Mechanical Modeling[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(7):18. |
| APA | Yan, Zhiyong,Chen, Lin,Xiong, Xiong,Wan, Bo,&Xu, Houze.(2021).Oceanic Plateau and Subduction Zone Jump: Two-Dimensional Thermo-Mechanical Modeling.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(7),18. |
| MLA | Yan, Zhiyong,et al."Oceanic Plateau and Subduction Zone Jump: Two-Dimensional Thermo-Mechanical Modeling".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.7(2021):18. |
入库方式： OAI收割
来源：地质与地球物理研究所
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