Seismic Velocity Structure and Improved Seismic Image of the Southern Depression of the Tainan Basin from Pre-Stack Depth Migration
Seismic Velocity Structure and Improved Seismic Image of the Southern Depression of the Tainan Basin from Pre-Stack Depth Migration
复制标题
台南盆地南部凹陷的叠前深度偏移地震速度结构及改进地震图像
DOI：
10.3319/tao.2010.01.03.01(tt
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发表时间：
2010-10
期刊：
影响因子：
--
通讯作者：
Zheng C.
中科院分区：
文献类型：
--
作者：
Tang Q. S.;Zheng C.
本文采用迭代叠前深度偏移方法，建立了台南盆地南部凹陷的速度模型及其偏移图像。新生代地层呈均匀层状，速度变化范围类似于1.8~3.6公里S(-1)，但NW段的总速度略低于SE段。裂缝和埋藏深度可能是其地震速度的控制因素。新生代与下伏的中生代地层之间存在不整合接触，速度跃变从类似3.2的速度跃升到类似于S(-1)的4.3公里。中生代地层具有明显的声学反射模式(混沌、变形和不连续)和复杂的内部结构(隆起、褶皱和断层)。层速度在似至3.5~似12.5公里范围内，S(-1)似4.3~4.7公里，最大沉积厚度可达6.5公里。碰撞、下沉、隆升等多重构造事件可能是导致中生代地层复杂的原因。
In this paper, a velocity model of the Southern Depression of the Tainan Basin is obtained along with its migrated image from an iterative pre-stack depth migration approach. The Cenozoic strata are uniformly layered with velocities varying from similar to 1.8 to similar to 3.6 km s(-1) However, the general velocity is slightly lower in the NW segment than the SE. Both fractures and burial depth might be the controls of their seismic velocities. There is an unconformable contact between the Cenozoic and underlying Mesozoic strata with an abrupt velocity jump from similar to 3.2 to similar to 4.3 km s(-1). The Mesozoic strata are recognized with acoustically distinct reflection patterns (chaotic, deformed and discontinuous) and complex internal structures (uplift, folds and faults). Their interval velocities range from similar to 4.3 to similar to 4.7 km s(-1) within a depth from similar to 3.5 down to similar to 12.5 km, and the maximum depositional thickness reaches up to 6.5 km. Multiple tectonic events such as collision, subsidence and uplift might be responsible for the complexity of the Mesozoic strata.
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影响因子：
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作者：
D. Hayes;S. Nissen;P. Buhl;J. Diebold;Yao Bochu;W. Zeng;Yong-shun Chen
通讯作者：
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DOI：
10.1190/1.1820731
发表时间：
1999
期刊：
Seg Technical Program Expanded Abstracts
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J. H. Cognet;G. Chavent;Y. D. Roeck;H. Nouzé
影响因子：
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DOI：
10.1144/gsl.sp.1997.126.01.03
发表时间：
1997
期刊：
Geological Society, London, Special Publications
影响因子：
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作者：
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通讯作者：
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