【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。更多还原

【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.更多还原