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| 天津地区上地壳构造及沧东断裂折射地震走时成像 | |
| 引用本文： | 丁丹,田晓峰,倪四道.天津地区上地壳构造及沧东断裂折射地震走时成像[J].华南地震,2011,31(1):37-46. |
| 作者姓名： | 丁丹 田晓峰 倪四道 |
| 作者单位： | 1. 中国科学技术大学地空学院,安徽合肥230029;湖南省地震局,湖南长沙410004 2. 中国科学技术大学地空学院,安徽合肥230029;中国地震局地球物理勘探中心,河南,郑州450003 3. 中国科学技术大学地空学院,安徽合肥,230029 |
| 基金项目： | 地震科学联合基金，知识创新工程 |
| 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. |
| 关 键 词： | 上地壳 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 |
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| DING Dan,TIAN Xiaofeng,NI Sidao.Refraction Seismic Travel Time Tomography of Upper Crust Structure of Tianjin and Cangdong Fault[J].South China Journal of Seismology,2011,31(1):37-46. | |
| Authors: | DING Dan TIAN Xiaofeng NI Sidao |
| Institution: | 1(1.School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China; 2.Earthquake Administration of Hunan Province,Changsha 410004,China; 3.The Geophysical Exploration Center of CEA,Zhengzhou 450002,China) |
| 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. |
| Keywords: | Upper Crust Cangdong Faul Refraction wave Travel-time tomography |
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