Indentation tectonics in the accretionary wedge of middle Manila Trench

Based on the multibeam morpho-tectonic analysis of the Manila Trench accretionary wedge and its indentation tectonics and the contrasting researches with other geological and geophysical data, three tectonic zones of the wedge are established, faulting features, tectonic distribution and stress mechanism for the indentation tectonicsareanalyzed,oblique subduction along Manila Trench with convergent stress of NW55. Is presented, and the relationship of the ceasing of Eastern Subbasin spreading of South China Sea Basin to the formation of subduction zone of Manila Trench is discussed. By the model analysis and regional research, it is found that the seamount subduction along Manila Trenchoes not lead to the erosion of the accretionary wedge and the oblique subduction actually is a NWWtrending obducfion of Luzon micro-plate that results from the NWW-trending displacement of the Philippine Sea plate.

作 者： LI Jiabiao JIN Xianglong Ruan Aiguo Wu Shimin WU Ziyin LIU Jianhua   作者單位： LI Jiabiao,JIN Xianglong(Key Lab of Submarine Geosciences, State Oceanic Administration,Hangzhou 310012, China; College of Sciences, Zhejiang University, Hangzhou 310027, China)

Ruan Aiguo,WU Ziyin,LIU Jianhua(Key Lab of Submarine Geosciences, State Oceanic Administration,Hangzhou 310012, China)

Wu Shimin(South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China) 

刊 名： 科學通報(英文版)  SCI 英文刊名： CHINESE SCIENCE BULLETIN  年，卷(期)： 2004 49(12)  分類號： P5  關鍵詞： Manila Trench   accretionary wedge   indentation tectonics   oblique subduction   morpho-tectonic analysis