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Title: Seismic velocity structure of the Eurasian margin of the southern Taiwan Strait
Authors: van Avendonk H. J.;Lester W.;McIntosh K. D.;Lee C.;Wang T. K.;Wu F. T.;Liu C.
Contributors: NTOU:Institute of Applied Geosciences
Date: 2009
Issue Date: 2011-10-20T08:19:20Z
Publisher: American Geophysical Union
Abstract: abstract:The Eurasian continental margin of the South China Sea rifted in an approximate north-south direction in Early Cenozoic to Miocene times. Besides the long rifting history, this margin is also known to be wide and structurally complex (Nissen et al., 1995). The nature of the extended crust of this margin is important for our understanding of the opening of the South China Sea basin. In addition, better constraints on the deep crustal structure of the passive margin is critical for our understanding of the arc-continent collision in Taiwan, since similar crustal rocks of the Chinese margin have likely been thrust under central Taiwan. The 2009 TAIGER program, which investigates the collision and accretion of the Luzon arc onto the Eurasian margin, therefore included a marine seismic reflection and refraction transect on the rifted margin of Eurasia just south of the Taiwan Strait. The proximity of this seismic line to the Taiwan orogen gives us confidence that the deep structure of this portion of the rifted margin is relatively similar to the continental crust that is engaged in the collision. In May of 2009 we deployed 21 ocean-bottom seismometers on this 315 km long seismic refraction across the margin. All instruments were recovered, but two of them did not record data. Although the data quality is variable, some of the wide-angle data show deep refractions and Moho reflections on the continental shelf and around the continental slope. We will present the first seismic velocity model based on this new data set.
URI: http://ntour.ntou.edu.tw/handle/987654321/25037
Appears in Collections:[應用地球科學研究所] 演講及研討會

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