| 南沙群岛海域磁性地层学初步研究 |
| |
| 引用本文： | 王保贵,汤贤赞,侯红明,袁友仁.南沙群岛海域磁性地层学初步研究[J].热带海洋学报,1993(2). |
| |
| 作者姓名： | 王保贵 汤贤赞 侯红明 袁友仁 |
| |
| 作者单位： | 中国科学院南海海洋研究所，中国科学院南海海洋研究所，中国科学院南海海洋研究所，中国科学院南海海洋研究所 广州 510301，广州 510301，广州 510301，广州 510301 |
| |
| 摘 要： | 根据南沙群岛海域NS89-76,NS90-103和NS84-38柱样的古地磁研究结果,三柱样终孔深度内均属布容正极性期沉积,较完整地记录了布容期约20万年以来5个短期极性事件。结合地层、古生物资料,~(230)Th及~(14)C年代测定,推断这些极性事件可分别与哥德堡、蒙哥、拉尚、布莱克、琵琶湖C事件对比。依极性事件的年代界限推算3个柱样的底界年龄分别为15ka,202ka,191ka。并对海域大陆架、大陆坡及海盆等地貌单元晚更新世以来的沉积作用进行了初步探讨。
|
| 关 键 词： | 磁性地层 地磁极漂移 极性事件 沉积作用 南沙海域 |
A PRELIMINARY STUDY ON THE MAGNETOSTRA-TIGRAPHY IN WATERS OF NANSHA ISLANDS |
| |
| Wang Baogui Tang Xianzan Hou Hongming Yuan Youren.A PRELIMINARY STUDY ON THE MAGNETOSTRA-TIGRAPHY IN WATERS OF NANSHA ISLANDS[J].Journal of Tropical Oceanography,1993(2). |
| |
| Authors: | Wang Baogui Tang Xianzan Hou Hongming Yuan Youren |
| |
| Abstract: | Paleomagnetic study results from core NS89-76, NS90-103 and NS84-38 are presented, indicating all the three cores were depositions of Brunches normal epoch, which recorded rather completely 5 short polarity events from the past 200 000 yrs. (Brunches normal epoch). Compared with data of stratigraphy, paleontology, 230Th and 14C dating, it is suggested that the 5 polarity events could be compared with Gothenburg, Mungo, Laschamp, Blake and BiwaC events. The ages of the bottom of core NS89-76, NS90-103 and NS84-38 according to the era of polarity events are 15ka, 202ka and 191ka, respectively. The late Pleistocene deposition in the continental shelf, slope and sea basin is also discussed in this paper. |
| |
| Keywords: | magnetostratigraphy geomagnetic pole drifts polarity event deposition waters of Nansha Islands |
| 本文献已被 CNKI 等数据库收录！ |
|
