Weak depth and along-strike variations in stretching from a multi-episodic finite stretching model: Evidence for uniform pure-shear extension in the opening of the South China Sea
文献类型：期刊论文
| 作者 | Chen, Lin1; Zhang, Zhongjie1; Song, Haibin2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2013-12-15 |
| 卷号 | 78页码:358-370 |
| 关键词 | South China Sea Stretching factor Subsidence Crustal thinning Uniform pure shear |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2012.12.033 |
| 文献子类 | Article |
| 英文摘要 | The South China Sea is widely believed to have been opened by seafloor spreading during the Cenozoic. The details of its lithospheric extension are still being debated, and it is unknown whether pure, simple, or conjunct shears are responsible for the opening of the South China Sea. The depth-dependent and along-strike extension derived from the single-stage finite stretching model or instantaneous stretching model is inconsistent with the observation that the South China Sea proto-margins have experienced multi-episodic extension since the Late Cretaceous. Based on the multi-episodic finite stretching model, we present the amount of lithosphere stretching at the northern continental margin of the South China Sea for different depth scales (upper crust, whole crust and lithosphere) and along several transects. The stretching factors are estimated by integrating seven deep-penetration seismic profiles, the Moho distribution derived from gravity modeling, and the tectonic subsidence data for 41 wells. The results demonstrate that the amount of stretching increases rapidly from 1.1 at the continent shelf to over 3.5 at the lower slope, but the stretching factors at the crust and lithosphere scales are consistent within error (from the uncertainty in paleobathymetry and sea-level change). Furthermore, the along-strike variation in stretching factor is within the range of 1.11-1.9 in west-east direction, accompanied by significant west-east differences in the thickness of high-velocity layers (HVLs) within the lowermost crust. This weak along-strike variation of the stretching factor is most likely produced by the preexisting contrasts in the composition and thermal structure of the lithosphere. The above observations suggest that the continental extension in the opening of the South China Sea mainly takes the form of a uniform pure shear rather than depth-dependent stretching. (C) 2012 Elsevier Ltd. All rights reserved. |
| WOS关键词 | NORTHERN CONTINENTAL-MARGIN ; RIVER MOUTH BASIN ; CRUSTAL STRUCTURE ; RIFTED MARGINS ; EVOLUTION ; PROFILE ; SUBSIDENCE ; CONSTRAINTS ; DETACHMENT ; ANOMALIES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000327804600024 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; 41021063) ; 41021063) ; 41021063) ; 41021063) ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; 41021063) ; 41021063) ; 41021063) ; 41021063) ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; 41021063) ; 41021063) ; 41021063) ; 41021063) ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; National Natural Science Foundation of China(41004039 ; 41021063) ; 41021063) ; 41021063) ; 41021063) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/88090]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, Lin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Lin,Zhang, Zhongjie,Song, Haibin. Weak depth and along-strike variations in stretching from a multi-episodic finite stretching model: Evidence for uniform pure-shear extension in the opening of the South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2013,78:358-370. |
| APA | Chen, Lin,Zhang, Zhongjie,&Song, Haibin.(2013).Weak depth and along-strike variations in stretching from a multi-episodic finite stretching model: Evidence for uniform pure-shear extension in the opening of the South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,78,358-370. |
| MLA | Chen, Lin,et al."Weak depth and along-strike variations in stretching from a multi-episodic finite stretching model: Evidence for uniform pure-shear extension in the opening of the South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 78(2013):358-370. |
入库方式： OAI收割
来源：地质与地球物理研究所
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