| 冲绳海槽地质构造特征 |
| |
| 作者姓名： | 丁培民 |
| |
| 作者单位： | 第一海洋地质调查大队 |
| |
| 摘 要： | 冲绳海槽是一个在新生代褶皱带基础上,中新世以来的构造活化区,即边缘海地洼区,其形成和发展与太平洋板块活动有关,为海底扩张的结果,具有过渡性地壳,高的热流值和至今还在活动的活火山。它经历了中中新世～晚中新世地洼初动期和上新世以来地洼激烈期的地质发展和演化,成为全球现今仍在继续活化的典型。本区可进一步划分为西北地洼列;北山地穹列;吐噶喇地洼列和冲绳地洼列四个构造单元。
|
| 关 键 词： | 构造活化 边缘海地洼系 |
THE GEOLOGY AND TECTONICS CHRACTERISTICS OF THE OKINAWA TROUGH |
| |
| Authors: | Ding Peimin No Marine Geological Investigation Party |
| |
| Institution: | Ding Peimin No. 1 Marine Geological Investigation Party |
| |
| Abstract: | The Okinawa marginal sea diwa system, which is in the basement of the fold-belt of holocene, has been an activeregion since Miocene. Its origin and development are closely related to the movement of the Pacific-Plate, resulting from the sea-floor spreading. Okinawa, with the crust moving from the continent to the ocean beneath it and high values of heat flow, has erupting volcanos now. It underwent an evolution and a development during the initial-mobility period between the mid-Miocene and the late Miocene, and has undergone its maximum-mobility period since Holocene, becoming an active model at present in the world. According to the diwa theory, diwa can be subdivided into: diwa region, diwa system and diwa Lie unit. Therefore, the Okinawa sea can be further subdivided into four diwa Lie units: 1. Northwest diwa Lie; 2. Bei-shan geodome Lie: 3. Tu-Ge-La diwa Lie and the Okinawa diwa Lie. The activity and spread of diwa in Okinawa have been mainly at the southern part of the Okinawa diwa Lie since Pliocene, and the Northwest diwa Lie in the Trough almost reached an residual-mobility period at that time. |
| |
| Keywords: | tectonic activation marginal sea diwa system |
| 本文献已被 CNKI 等数据库收录！ |
|
