Tectonic implications of new Late Cretaceous paleomagnetic constraints from Eastern Liaoning Peninsula, NE china
文献类型：期刊论文
| 作者 | Lin, W; Chen, Y; Faure, M; Wang, QC |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2003-06-21 |
| 卷号 | 108期号:B6 |
| 关键词 | paleomagnetism rifting continental margin Meso-Cenozoic geodynamics Songliao Basin northeastern China plain |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2002JB002169 |
| 文献子类 | Article |
| 英文摘要 | [1] A paleomagnetic study has been carried out in the east of the Tan-Lu fault, in Liaoning Province, NE China, to understand the timing of Tan-Lu fault activity. Samples aging from Early Paleozoic to Late Mesozoic from 51 sites have been analyzed. Paleozoic and Late Permian-Early Triassic rocks are remagnetized by the recent geomagnetic field; however, Late Cretaceous (between 118 and 83 Ma) red tuffaceous sandstone passes a positive fold test, shows no Present Earth Field characteristic remanent magnetization carried by both magnetite and hematite, presents a solo normal polarity, and thus provides the only reliable paleomagnetic data in this study. The paleomagnetic pole calculated from these rocks (lambda(p) = 59.4degreesN, phi(p) = 205.5degreesE, and A(95) = 7.3degrees) is statistically undistinguishable from all available Cretaceous paleomagnetic data from Eastern Liaoning-Korean Peninsula, indicating that these areas may belong to a single tectonic unit, here named the East Liaoning-Korea (ELK) Block, at least since the Late Cretaceous. Conversely, a significant discrepancy between the ELK Block and Chinese Block (i.e., North and South China Blocks) characterized by a differential rotation (22.5degrees +/- 10.2degrees) with a negligible latitudinal displacement (0.8degrees +/- 6.1degrees) is demonstrated. This result indicates, first, that the left-lateral displacement along the Tan-Lu fault, if any, must have occurred before the Late Cretaceous and, second, that the Korean Block can not be considered as a rigid part of North China Block. Sedimentological and structural evidence show that the Meso-Cenozoic triangle shaped plain, consisting of Songliao, Xialiaohe, Sanjiang, Zeya, and other smaller basins developing in northeast China and southeast Russia, south of the Mongol-Okhotsk Belt, experienced a heterogeneous rifting from the Late Jurassic to Tertiary. The variable amount of extension, larger in the northeast (similar to300 km) than in the southwest (similar to80 km), is probably related to the clockwise rotation of the ELK Block centered at the south of the Bohai Bay Basin. This result shows that a significant segment of the East Eurasian margin (more than 1000 km long) experienced differential rotation in Cenozoic times. |
| WOS关键词 | POLAR WANDER PATH ; TAN-LU FAULT ; SOUTH CHINA ; NORTH CHINA ; SEDIMENTARY-ROCKS ; KOREAN PENINSULA ; EVOLUTION ; BLOCK ; COLLISION ; APPARENT |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000183883200003 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78167]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Lin, W |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Orleans, ISTO, Dept Sci Terre, F-45067 Orleans 02, France 3.Inst Phys Globe, Paris, France |
| 推荐引用方式 GB/T 7714 | Lin, W,Chen, Y,Faure, M,et al. Tectonic implications of new Late Cretaceous paleomagnetic constraints from Eastern Liaoning Peninsula, NE china[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2003,108(B6). |
| APA | Lin, W,Chen, Y,Faure, M,&Wang, QC.(2003).Tectonic implications of new Late Cretaceous paleomagnetic constraints from Eastern Liaoning Peninsula, NE china.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,108(B6). |
| MLA | Lin, W,et al."Tectonic implications of new Late Cretaceous paleomagnetic constraints from Eastern Liaoning Peninsula, NE china".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 108.B6(2003). |
入库方式： OAI收割
来源：地质与地球物理研究所
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