| 冲绳海槽现代张裂的地球物理特征 |
| |
| 引用本文： | 杨文达.冲绳海槽现代张裂的地球物理特征[J].海洋地质与第四纪地质,2004,24(3):77-82. |
| |
| 作者姓名： | 杨文达 |
| |
| 作者单位： | 上海海洋石油局,第一海洋地质调查大队,上海,201208 |
| |
| 摘 要： | 位于东海陆架与琉球岛弧之间的冲绳海槽为板块俯冲作用形成的弧后断陷盆地，具有独特的构造地貌特征。自中新世末以来历经了4个强烈拉张的演化时期，目前已达到张裂的高级阶段。地球物理资料显示，海槽中的现代拉张作用仍在进行，表现在海槽轴部快速沉降形成地堑槽，对称分布的张性断裂，晚更新世—全新世以来的岩浆活动，从老至新排列的磁异常务带以及高地热流、频繁的地震活动等，充分体现了冲绳海槽的现代扩张特点。
|
| 关 键 词： | 冲绳海槽 现代张裂 地球物理 构造地貌 ：陆壳张裂 |
| 文章编号： | 0256-1492(2004)03-0077-06 |
| 修稿时间： | 2003年12月24 |
MODERN GEOPHYSICAL CHARACTERISTICS OF TECTONIC TENSION FAULT IN THE OKINAWA TROUGH |
| |
| YANG,Wen-da.MODERN GEOPHYSICAL CHARACTERISTICS OF TECTONIC TENSION FAULT IN THE OKINAWA TROUGH[J].Marine Geology & Quaternary Geology,2004,24(3):77-82. |
| |
| Authors: | YANG Wen-da |
| |
| Abstract: | Okinawa Trough,a back-arc fault basin that was formed by the plate collision and subduction,is located between the continental shelf of the East China Sea and Ryukyu Island arc.It has unique tectonic geomorphological features.The back-arc faulting started in Miocene,and the tension of fracture is continuing now.Okinawa Trough has undergone four intensive stages of tension evolution since the end of Miocene and now it is in the high stage of tension.According to geophysical data,modern tension action is still active in the Trough.For examples,the graben trough was caused by rapid subsidence of the axis of the Okinawa Trough and tension faults were formed symmetrically,and aslo there were magmatic activities,frequent earthquakes and high heat-flow phenomena from late Pleistocene to Holocene In addition,there are the zones of magnetic anomalies ranging from old to new ones.The tension characteristics of the Okinawa Trough in modern times have sufficiently been proved. |
| |
| Keywords: | plate collision subduction tension fracture of continental crust stage evolution modern tension the Okinawa Trough |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
