Early Paleozoic paleomagnetic poles from the western part of the North China Block and their implications
文献类型：期刊论文
| 作者 | Huang, BC; Yang, ZY; Otofuji, Y; Zhu, RX |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 1999-07-15 |
| 卷号 | 308期号:3页码:377-402 |
| 关键词 | North China Block (NCB) early Paleozoic paleomagnetism paleogeography Apparent Polar Wander Path (APWP) |
| ISSN号 | 0040-1951 |
| 文献子类 | Article |
| 英文摘要 | We collected 917 oriented drill-core samples (124 sites) from 22 units spanning the Early Cambrian to Middle Ordovician formations of the North China Block (NCB) to construct an apparent polar wander path (APWP) of the early Paleozoic for the NCB. Sampling areas are located in the Helanshan, Tongchuan-Hancheng and Yuncheng-Luliang regions along the margin of the Ordos Basin. Characteristic remanent magnetizations for five periods between the Cambrian and Ordovician are isolated from 281 samples by careful demagnetization. Directions cluster around northwesterly direction with upward shallow inclination and its antipode after tilt correction. Reliability of these five directions is ascertained through positive fold and reversal tests. The five Cambrian and Ordovician paleopoles plot in the present Atlantic Ocean, which is consistent with previously reported paleomagnetic poles. A newly constructed APWP between the Cambrian and Ordovician indicates that the NCB was located in the Southern Hemisphere around 15 degrees S during Cambro-Ordovician time. Motion of the NCB between the Early and Middle Cambrian comprised: a counterclockwise rotation of 22.3 degrees +/- 7.0 degrees and a northward latitudinal displacement of 7.2 degrees +/- 6.8 degrees. Combining the paleobiogeographic and paleoclimatic data with the paleomagnetic implies that the NCB was probably located in East Gondwana in the Early Cambrian, and may have separated from Gondwana in post-Early Cambrian time. The NCB is also inferred to have been located close to Siberia and North America during the Middle Ordovician. (C) 1999 Elsevier Science B.V. All rights reserved. |
| WOS关键词 | TRUE POLAR WANDER ; SOUTH CHINA ; TEMPERATURE BEHAVIOR ; MAGNETIC-BEHAVIOR ; INDIAN-OCEAN ; FOLD TEST ; CONSTRAINTS ; GONDWANA ; PALEOGEOGRAPHY ; PYRRHOTITE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000081641600006 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75334]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Huang, BC |
| 作者单位 | 1.Chinese Acad Sci, Inst Geophys, Beijing 100101, Peoples R China 2.Kobe Univ, Fac Sci, Dept Earth & Planetary Sci, Kobe, Hyogo 6578501, Japan 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, BC,Yang, ZY,Otofuji, Y,et al. Early Paleozoic paleomagnetic poles from the western part of the North China Block and their implications[J]. TECTONOPHYSICS,1999,308(3):377-402. |
| APA | Huang, BC,Yang, ZY,Otofuji, Y,&Zhu, RX.(1999).Early Paleozoic paleomagnetic poles from the western part of the North China Block and their implications.TECTONOPHYSICS,308(3),377-402. |
| MLA | Huang, BC,et al."Early Paleozoic paleomagnetic poles from the western part of the North China Block and their implications".TECTONOPHYSICS 308.3(1999):377-402. |
入库方式： OAI收割
来源：地质与地球物理研究所
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