English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40649
Visitors : 647754      Online Users : 53
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/32302

Title: The asymmetric spreading crust of the South China Sea
Authors: Mao-Hsiang Chiu;Tan-Kin Wang;Chao-Shing Lee
Contributors: NTOU:Institute of Applied Geosciences
Date: 2010
Issue Date: 2012-06-15T07:44:10Z
Publisher: Western Pacific Geophysics Meeting
Abstract: abstract:Recent researches revealing, there are many complex structures in the South China Sea (SCS). There are folds, trenches, mud appearances, mud volcanoes, gas hydrates and faults. Why is this region so complicated? As we know, this area is affected by the dynamic plates. The most important reason is due to subduction between the Eurasia Plate and Philippine Sea Plate. It creates many big structures in the South China Sea, including the Manila Trench, fossil South China Sea ridge and Luzon volcano Arc, etc. In this study, we analyze the seismic data to understand the tectonics in the SCS. Through the Continental Shelf Survey Program, we deployed 68 Ocean Bottom Seismometers (OBS) on the seabed in the SCS in 2007 and 2008. From northwest to southeast, the profiles are distributed in the depth of 1500m to 4200m. We assembled the Multi-Channel Seismic (MCS) data and Ocean Bottom Seismometer (OBS) data. The MCS data displays the shallow stratum. The OBS data is about the P-wave and S-wave reflection and refraction used to estimate the structure in the crust and upper mantle. In this data, we obtain that there are some old igneous rock besides the horizontal sedimentary beds. According to previous researches, the South China Sea is a Miocene-Eocene spreading basin and belongs to an asymmetric rift of the continental margin. It started to spread in about 32 Ma and ended in about 15 Ma. We could obtain the difference of the South China Sea between the north and south part. In the north part, there are many northward and low angle thrust faults. On the other hand, there are many high angle thrust faults in the south part. In the central basin, a thin sedimentary rock lay over the seabed. We used the MCS data to establish the initial model and extend to the deep by the OBS data, in an aim to better understand the evolution of the SCS.
URI: http://ntour.ntou.edu.tw/handle/987654321/32302
Appears in Collections:[應用地球科學研究所] 演講及研討會

Files in This Item:

There are no files associated with this item.

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback