Late Cenozoic Tectonic Deformation in the Dongsha Islands and Adjacent Sea Area

Dongsha Island and the adjacent sea area locate at the northern continental margin of the South China Sea (SCS), and is connected to the east by the Manila Trench. Analyses of seismic stratigraphy and gravity, magnetic and drilling wells data led to the discovery of three post-fault sequences (V, VI, VII). Extensive tectonic uplift, magma activity and erosion occurred in Dongsha Island and the adjacent area, where most of the faults in the northeastern SCS were still active during Pliocene and Quaternary. Two groups of faults trending NEE and NW were developed during Late Cenozoic. We conclude that three important tectonic movements, especially Dongsha movement (4.4-5.2 Ma) and Liuhua movement (1.4-1.89 Ma), controlled the structural framework in the Dongsha rise; whose deformation in the east is stronger than that in the west and whose stress field variation suggests that the tectonic uplift in the study area contributed to magmato-tectonic events correlated to the main collision phases between the East China and Taiwan 5-3 and 3-0 Ma ago.

作 者： 吳時國 劉展 王萬銀 郭軍華 T.Lüdmann H.K.Wong   作者單位： 吳時國(Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China)

劉展(Ocean University of China, Qingdao 266003, China)

王萬銀(College of Engineering and Geodesy, Changan University, Xian, China)

郭軍華(Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China)

T.Lüdmann,H.K.Wong(Institute of Biogeochemistry, University of Hamburg, Hamburg, Germany) 

刊 名： 中國海洋湖沼學(xué)報(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY  年，卷(期)： 2003 21(4)  分類號： P73  關(guān)鍵詞： Late Cenozoic tectonic movement   seismic stratigraphy   plate collision   South China Sea  

【Late Cenozoic Tectonic Deformation i】相關(guān)文章：

Crust Shortening of the Daliangshan Tectonic Zone in the Cenozoic Era and Its Implications04-27

Paleomagnetic result of the Cenozoic volcanic rocks from the Tuoyun Basin,southwest Tien Shan of China and its tectonic04-27

On deposits controlled by tectonic lenses04-27

Being Late for School上學(xué)遲到05-04

Progress in researching into the transition of the Mesozoic tectonic systems in southeast China04-26

Talking about a bad habit-sleeping late晚睡05-04

I believe I can fly英語作文100字03-21

Geochemical characteristics and tectonic implications of HP-UHP eclogites and blueschists in southwestern Tianshan, Chin04-26

癡迷滑翔傘運動 I feel I can fly05-04

Late Glacial and Holocene vegetation history and paleoclimate of the Tengger Desert, northwestern China04-27