节点文献
天津地区上地壳构造及沧东断裂折射地震走时成像
Refraction Seismic Travel Time Tomography of Upper Crust Structure of Tianjin and Cangdong Fault
【摘要】 采用初至波成像方法,对天津地区上地壳进行成像,获得了塘沽-武清地区上地壳P波速度精细结构,成像结果反映了沧县隆起两侧凹陷盆地不断拉张下沉的特征。基于Colin Zelt提出的初至波成像方法,给出了一种判断隐伏断裂的成像方法,数值模拟和对沧东断裂的成像结果显示出该方法的有效性,同时也对沧东断裂进行了空间判断和分析。
【Abstract】 A fine P-wave velocity structure of upper crust from Tanggu to Wuqing in Tianjin was obtained by using the first arrival tomography in this paper.The results show that the depression on both sides of Cangxian uplift has kept extensional subsiding constantly.Based on first arrival tomography(FAST) proposed by Colin Zelt,this paper provided a method to determine buried fault.It has been proved to be effective by numerical simulation and field results.The spatial distributions of Cangdong fault were also given.
【关键词】 上地壳;
沧东断裂;
折射地震;
走时成像;
【Key words】 Upper Crust; Cangdong Faul; Refraction wave; Travel-time tomography;
【Key words】 Upper Crust; Cangdong Faul; Refraction wave; Travel-time tomography;
【基金】 地震科学联合基金C08057;知识创新工程kzcx2-yw-116-01
- 【文献出处】 华南地震 ,South China Journal of Seismology , 编辑部邮箱 ,2011年01期
- 【分类号】P315
- 【被引频次】5
- 【下载频次】89