Paleomagnetism of Jurassic sandstones from Yangtze fold belt and its implications for the fold belt curvature
文献类型：期刊论文
| 作者 | Han, YL ; Xu, CH ; Zhou, ZY ; Tan, XD |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2009 |
| 卷号 | 52期号:12页码:3072-3082 |
| 关键词 | Yangtze fold belt Jurassic Paleomagnetism Orocline |
| ISSN号 | 0001-5733 |
| 通讯作者 | maizehan8@163.com ; xdtan@scsio.ac.cn |
| 中文摘要 | To promote our knowledge about the origin of the difference in fold axis strikes between upper and middle Yangtze fold belt, we conducted a paleomagnetic study of Middle and Late Jurassic sandstones from Wanzhou and Yunyang County, Chongqing City, a transition zone between the upper and middle Yangtze fold belt. Stepwise thermal demagnetization isolated two components. The low temperature components (LTC) were isolated from all the samples and overprinted by recent geomagnetic field. The high temperature components (HTC) isolated from the Middle and I-ate Jurassic samples from Wanzhou County were also overprinted by recent geomagnetic field. Stepwise unfolding indicates that the maximum precision parameter of HTC isolated from the Late Jurassic samples from Yunyang County is achieved at 33.8% unfolding. The best-clustered HTC mean direction is D = 19.1 degrees, I = 48.9 degrees (alpha(95) = 6.3 degrees), corresponding to a paleopole at 73.5 degrees N, 198.2 degrees E (dp = 5.5 degrees, dm = 8.3 degrees). Compared with the Cretaceous reference paleopole, it reveals that Yunyang County has experienced a clockwise rotation of 7.7 degrees+/-6.1 degrees at the late stage of folding. Combined with published data, our new results support a general orocline in the middle Yangtze fold belt, most probably caused by indentation of NCB into SCB. However, the curvature in the transition zone of upper and middle Yangtze fold belt could be due to strain partitioning in the course of NW directed subduction of the Pacific plate rather than oroclinal bedding. |
| 学科主题 | Geochemistry & Geophysics |
| 收录类别 | SCI |
| 原文出处 | SCIENCE PRESS |
| WOS记录号 | WOS:000273364200016 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/4586]  |
| 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 | Han, YL,Xu, CH,Zhou, ZY,et al. Paleomagnetism of Jurassic sandstones from Yangtze fold belt and its implications for the fold belt curvature[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2009,52(12):3072-3082. |
| APA | Han, YL,Xu, CH,Zhou, ZY,&Tan, XD.(2009).Paleomagnetism of Jurassic sandstones from Yangtze fold belt and its implications for the fold belt curvature.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,52(12),3072-3082. |
| MLA | Han, YL,et al."Paleomagnetism of Jurassic sandstones from Yangtze fold belt and its implications for the fold belt curvature".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 52.12(2009):3072-3082. |
入库方式： OAI收割
来源：南海海洋研究所
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