Intra-trench variations in flexural bending of the subducting Pacific Plate along the Tonga-Kermadec Trench
文献类型：期刊论文
| 作者 | Zhang, Fan; Lin, Jian; Zhou, Zhiyuan |
| 刊名 | ACTA OCEANOLOGICA SINICA
 |
| 出版日期 | 2019 |
| 卷号 | 38期号:11页码:81 |
| 关键词 | Tonga-Kermadec Trench horizon deep axial vertical force axial bending moment effective elastic thickness flexural curvature analysis |
| DOI | 10.1007/s13131-019-1493-4 |
| 英文摘要 | We conducted a detailed analysis of along-trench variations in the flexural bending of the subducting Pacific Plate at the Tonga-Kermadec Trench. Inversions were conducted to obtain best-fitting solutions of trench-axis loadings and variations in the effective elastic plate thickness for the analyzed flexural bending profiles. Results of the analyses revealed significant along-trench variations in plate flexural bending: the trench relief (W0) of 1.9 to 5.1 km; trench-axis vertical loading (V0) of -0.5x1012 to 2.2x1012 N/m; axial bending moment ( M0) of 0.1x1017 to 2.2x1017 N; effective elastic plate thickness seaward of the outer-rise region () of 20 to 65 km, trench-ward of the outer-rise () of 11 to 33 km, and the transition distance (Xr) of 20 to 95 km. The Horizon Deep, the second greatest trench depth in the world, has the greatest trench relief (W0 of 5.1 km) and trench- axis loading (V0 of 2.2x 1012 N/ m); these values are only slightly smaller than that of the Challenger Deep (W0 of 5.7 km and V0 of 2.9x 1012 N/m) and similar to that of the Sirena Deep (W0 of 5.2 km and V0 of 2.0x1012 N/m) of the Mariana Trench, suggesting that these deeps are linked to great flexural bending of the subducting plates. Analyses using three independent methods, i.e., the / inversion, the flexural curvature/yield strength envelope analysis, and the elasto-plastic bending model with normal faults, all yielded similar average Te reduction of 28%-36% and average Te reduction area of 1 195-1 402 km2 near the trench axis. The calculated brittle yield zone depth from the flexural curvature/yield strength envelope analysis is also consistent with the distribution of the observed normal faulting earthquakes. Comparisons of the Manila, Philippine, Tonga-Kermadec, Japan, and Mariana Trenches revealed that the average values of and both in general increase with the subducting plate age. |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41976064, 91958211, 41890813, 91858207, 91628301, U1606401, 41976066, 41706056]; Programs of the Chinese Academy of Sciences [Y4SL021001, QYZDY-SSW-DQC005, 133244KYSB20180029]; National Key Research and Development Program of China [2018YFC0309800, 2018YFC0310100]; China Ocean Mineral Resources RD Association [DY135-S2-1-04] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41976064, 91958211, 41890813, 91858207, 91628301, U1606401, 41976066, 41706056]; Programs of the Chinese Academy of Sciences [Y4SL021001, QYZDY-SSW-DQC005, 133244KYSB20180029]; National Key Research and Development Program of China [2018YFC0309800, 2018YFC0310100]; China Ocean Mineral Resources RD Association [DY135-S2-1-04] |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18256]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Fan,Lin, Jian,Zhou, Zhiyuan. Intra-trench variations in flexural bending of the subducting Pacific Plate along the Tonga-Kermadec Trench[J]. ACTA OCEANOLOGICA SINICA,2019,38(11):81, 90. |
| APA | Zhang, Fan,Lin, Jian,&Zhou, Zhiyuan.(2019).Intra-trench variations in flexural bending of the subducting Pacific Plate along the Tonga-Kermadec Trench.ACTA OCEANOLOGICA SINICA,38(11),81. |
| MLA | Zhang, Fan,et al."Intra-trench variations in flexural bending of the subducting Pacific Plate along the Tonga-Kermadec Trench".ACTA OCEANOLOGICA SINICA 38.11(2019):81. |
入库方式： OAI收割
来源：南海海洋研究所
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