Early Cenozoic paleo-stress field in the eastern margin of the Tibetan Plateau : Magnetic fabric records in the southwestern part of Sichuan Basin
文献类型：期刊论文
| 作者 | Zhang Shuai2; Tian YunTao2,3; Tian Ye2; Liu YiMin2; Tang Yuan2; Qin YongHui2; Yan ZhaoKun4; Li ShiHu1; Shen ZhongShan1; Zhang ZengJie2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 64期号:5页码:1643-1653 |
| 关键词 | Southwestern Sichuan foreland basin Paleomagnetism Longmen Shan fold-thrust belt Magnetic fabric Paleo-stress |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg202100490 |
| 英文摘要 | The southwestern part of the Sichuan Basin is located on the eastern margin of the Tibetan Plateau, adjacent to the southern segment of the Longmenshan fold-thrust belt. The early Cenozoic red beds in this area recorded the uplift history and tectonic evolution of the eastern margin of the Tibetan Plateau. In this study, we applied magnetic fabric (i.e., anisotropy of magnetic susceptibility) analyses to the lower Paleogene stratigraphic section (including the Mingshan and Lushan formations) in Lushan area. A total of 548 samples were analyzed. Results show that magnetic foliations of the samples are parallel to the bedding, with magnetic lineations in a direction of NE-SW (39 degrees/219 degrees) and clustered K-3 (120.9 degrees +/- 1.3 degrees). Such a fabric is the type of initial deformation magnetic fabric, which was formed in the diagenetic stage of the strata and has not been overprinted by later folding and faulting. We therefore suggest that these magnetic fabric results recorded the early Cenozoic paleo-stress field of the study area, where deformation was dominated by shortening with a NW-SE maximum principal stress, perpendicular to the magnetic lineation. The late Cenozoic and present stress field of this area, revealed by structural, GPS and earthquake focal mechanism studies, is similar to that of the early Cenozoic, suggesting that the Longmenshan plateau margin may have been formed in the early Cenozoic. |
| WOS关键词 | FOLD-THRUST BELT ; LONGMEN SHAN ; STRUCTURAL GEOMETRY ; TECTONIC EVOLUTION ; DEFORMATION ; SUSCEPTIBILITY ; CHINA ; FRONT |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000647152100014 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101224]  |
| 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 | Tian YunTao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Guangdong, Peoples R China 4.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Shuai,Tian YunTao,Tian Ye,et al. Early Cenozoic paleo-stress field in the eastern margin of the Tibetan Plateau : Magnetic fabric records in the southwestern part of Sichuan Basin[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2021,64(5):1643-1653. |
| APA | Zhang Shuai.,Tian YunTao.,Tian Ye.,Liu YiMin.,Tang Yuan.,...&Zhang ZengJie.(2021).Early Cenozoic paleo-stress field in the eastern margin of the Tibetan Plateau : Magnetic fabric records in the southwestern part of Sichuan Basin.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,64(5),1643-1653. |
| MLA | Zhang Shuai,et al."Early Cenozoic paleo-stress field in the eastern margin of the Tibetan Plateau : Magnetic fabric records in the southwestern part of Sichuan Basin".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 64.5(2021):1643-1653. |
入库方式： OAI收割
来源：地质与地球物理研究所
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