| 德雷克海峡的扩张历史及其影响 |
| |
| 引用本文： | 吴水根,吕文正.德雷克海峡的扩张历史及其影响[J].极地研究,1988,1(2):1-7. |
| |
| 作者姓名： | 吴水根 吕文正 |
| |
| 作者单位： | 国家海洋局第二海洋研究所 杭州
(吴水根)，国家海洋局第二海洋研究所 杭州(吕文正) |
| |
| 摘 要： | 本文利用首次南大洋考察期间获得的德雷克海峡地球物理场资料,解释海峡海底板块扩张历史以及海峡扩张对南极环境形成的影响.
|
| 关 键 词： | 条带磁异常 重力梯度 扩张速度 构造格局 绕极环流 |
THE HISTORY OF SPREADING OF DARKE PASSAGE AND ITS EFFECTS |
| |
| Wu Shuigen Lu Wenzheng.THE HISTORY OF SPREADING OF DARKE PASSAGE AND ITS EFFECTS[J].Chinese Journal of Polar Research,1988,1(2):1-7. |
| |
| Authors: | Wu Shuigen Lu Wenzheng |
| |
| Abstract: | In the paper the histroy of spreading of Darke Passage and its effects on Antarctic circumpolar current are discussed basing on the geophysical data obtained during first Chinese Antarctic Expedition.
The spreading direction of Drake Passage is NW-SE. The spreading process could be distinguished into three stages: first stage was in 28-24 Ma B.P., the second in 24-16 Ma B.P. and the third in 16-8 Ma B.P. The spreading rates are 2.5cm/a, 1.8cm/a, and 1.0 cm / a repectively.
The West Antarctica was separated form the South America by the spreading of Drade Passage. It is the last important geological event in Gondwanaland fragmertation.
The Antarctic circumpolar current was formed in 24 Ma B.P. The development of the current was restrited by Shackleton Fault Zone. The current prevents warm current from Equator. Thus, it is the main cause for that the temperature of Antarctic continent became very cold. |
| |
| Keywords: | Stripe magnetic anomaly gravity gradient Spreading rate Tectonic framework Circumpolar current |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《极地研究》浏览原始摘要信息 |
| 点击此处可从《极地研究》下载免费的PDF全文 |
