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Structural control of the Gagua Wedg

时间:2021-12-08 10:02:15 天文地理论文 我要投稿

Structural control of the Gagua Wedge Zone east of Taiwan Island on the southern Okinawa Trough

Based on compositive analysis and interpretation of the observed and historical data, the geophysical field characters and structural properties of the Gagua "Wedge" Zone of the sea area east of Taiwan Island and the primary tectonic stress direction and its variabilities of backarc spreading in the southern Okinawa Trough are studied. It is concluded from the study results that the Gagua "Wedge" Zone is structurally consistent with the Gagua ridge and two fault basins on both sides of the Gagua ridge, and adjusts the moving direction and distance of the western Philippine Sea plate to make the northwestward motion of the plate on its east side change to the northward subduction of the plate on its west side so that the primary tectonic stress direction of the Okinawa Trough changed from NW-SE to nearly N-S, which provided the stress source for the Okinawa Trough to enter the second spreading stage.

作 者: ZHENG Yanpeng LIU Baohua WU Jinlong LIANG Ruicai LIU Chenguang ZHANG Zhengmin   作者单位: ZHENG Yanpeng(Marine Geology College, Ocean University of China, Qingdao 266003, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Sedimentology and Environmental Geology, State Oceanic Administration, Qingdao 266061, China)

LIU Baohua,LIANG Ruicai,LIU Chenguang(First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Sedimentology and Environmental Geology, State Oceanic Administration, Qingdao 266061, China)

WU Jinlong(First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China)

ZHANG Zhengmin(Marine Geology College, Ocean University of China, Qingdao 266003, China) 

刊 名: 中国科学D辑(英文版)  SCI 英文刊名: SCIENCE IN CHINA SERIES D(EARTH SCIENCES)  年,卷(期): 2005 48(8)  分类号: P5  关键词: east of Taiwan Island   Gagua "Wedge" Zone   Okinawa Trough   structural control