南海海盆海山古地磁及海盆的形成演化

金钟; 徐世浙; 李全兴

南海海盆海山古地磁及海盆的形成演化

1.
南京大学, 海岸与海岛开发教育部重点实验室, 江苏, 南京, 210093;国家海洋局海底科学重点实验室, 浙江, 杭州, 310012
2.
浙江大学, 地球科学系, 浙江, 杭州, 310027
3.
国家海洋局海底科学重点实验室, 浙江, 杭州, 310012

基金项目: 国家自然科学基金资助项目(49176261);南京大学海岸与海岛开发教育部重点实验室资助项目(SCIEL21101105).

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出版历程
- 收稿日期: 2002-11-02
- 修回日期: 2004-05-15

The development and paleomagnetics of seamounts in the subbasin of the South China Sea, China

1.
Key Laboratory of Coast and Island Development of Ministry of Education, Nanjing University, Nanjing 210093, China;Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China
2.
Department of Geoscience, Zhejiang University, Hangzhou 310027, China
3.
Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China

摘要

摘要: 根据海山磁性反演获取的古地磁成果发现,南海海盆东部和西南部的运动形式、生成时代存在很大差异,东部海盆和西南部海盆之间由一条北北西走向的岩石圈压性左旋转换(性)断层——"南海海盆中央断裂"分界.结合已有的地质地球物理成果分析和论证,确定了南海海盆在古南海和与之接壤的华南地块南部边缘形成.南海海盆的形成演化分四个阶段:第一阶段,始新世"古南海断裂"产生,古南海被一分为二;第二阶段,渐新世东部海盆开始发育——扩裂;第三阶段,中中新世西南部海盆开始发育——张裂;第四阶段,南海海盆整体旋转,古南海圈闭.
- 南海 /
- 海山 /
- 古地磁 /
- 海盆 /
- 演化
Abstract: According to the result of paleomagnetism inversed from magnetic anomalies of seamounts in the South China Sea,China between its eastern and southwestern subbasins there is much difference in the movement form and active age.There is a transform fault of NNW-trending with compressive left-slip——"the central fault of the South China Sea Basin" between two subbasins.Combined with analysis and interpretation for the given results of geological and geophysical research,it can be concluded that the South China Sea Basin was developed between the ancient South China Sea and the southern edge of South China terrain.The development of the South China Sea can be divided into four stages as follows:Stage Ⅰ,in Eocene the ancient South China Sea was split into two parts with the formation of its fault;Stage Ⅱ,in Oligocene the eastern subbasin began to develop with rupture;Stage Ⅲ,in Miocene the southwestern subbasin began to develop with rift;Stage Ⅳ,the South China Sea revolved and the ancient South China Sea closed.
- South China Sea, China /
- subbasin /
- seamount /
- paleomagnetics /
- development

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参考文献(34)

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