National Taiwan Ocean University Institutional Repository:Item 987654321/25032
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40652
Visitors : 770160      Online Users : 55
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:

Title: Velocity Models and Pre-Stack Depth Migration of Gas Hydrates on Taiwan Accretionary Prism
Authors: B.J. Yang;T.K. Wang;J.M. Deng;C.S. Liu
Contributors: NTOU:Institute of Applied Geosciences
Date: 2010-06-14
Issue Date: 2011-10-20T08:19:16Z
Publisher: European Association of Geoscientists & Engineers
Abstract: Reflection images of the accretionary prism along seismic profiles collected from R/V Maurice Ewing in 1995 and from R/V Marcus G. Langseth in 2009 off SW Taiwan are presented for charactering gas hydrates in this study. Pre-stack depth migrations of the seismic profiles indicate the thickness of sediments about 2-3 km and the depth of the bottom simulated reflector (BSR) about 300 m below the sea floor. Layers of gas hydrate and free gas are about 100 m thick and 80 m thick, respectively. Horizontal velocity analysis of the seismic profiles show a gas-hydrate layer above BSR with a P-wave velocity of about 2100 m/s and a free-gas layer below BSR with a P-wave velocity of about 1800 m/s. Most BSRs are non-continuous in the accretionary prism that may result from the gas dissipation from thrust faults, fractures and severe deformation due to subduction. Gas migrated from thrust faults and accumulated beneath the lower slope of the accretionary prism may result in more clear and continuous BSRs in the lower slope than those in the upper slope of the accretionary prism. The difference of BSRs may be associated with the organic sediments came from the river of Taiwan.
Appears in Collections:[Institute of Applied Geosciences] Lecture & Seminar

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