Balanced Cross Section for Restoration of Tectonic Evolution in the Southwest Okinawa Trough

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• 作者：Shiguo Wu ; Xianglong Ni ; Junhua Guo
• 关键词：infinite element ; prestressed anchor ; couple ; finite element
• 刊名：Journal of China University of Geosciences
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：18
• 期：1
• 页码：1-10
• 全文大小：846 K

文摘

On the basis of the multi-channel seismic data and the other data, using 2DMove software. the tectonic evolution in three seismic profiles was restored since Pliocene. The tectonic restoration results show that: (1) the initial active center lay in the west slope and then was transferred to east and south via trough center during the evolution process; (2) several main normal faults controlled the evolution of the southern Okinawa Trough; (3) since Late Pliocene, the southern Okinawa Trough has experienced two spreading stages. The early is depression in Early-Middle Pleistocene and the late is back-arc spreading in Late Pleistocene and Holocene, which is in primary oceanic crust spreading stage.