Research on Crustal Structure and Active Fault in the Sanhe-Pinggu Earthquake (M8.0) Zone Based on Single-Fold Deep Seismic Reflection and Shallow Seismic Reflection Profiling

详细信息   

• 责任者：Liu Baojin (Geophysical Prospecting Center ; China Earthquake Administration ; Zhengzhou 450002 ; China) ; Zhang Xiankang
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(5)
• 关键词：地壳结构 ; crustal structure ; 活动断层 ; active faults ; 深地震测深 ; deep seismic sounding ; 北京 ; Beijing ; 河北 ; Hebei Province
• 页码：p.1251-1259
• 图表：7 illus., 1 table, 15 refs.
• 分类号：0500
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The crustal structure and deep-shallow tectonic features of the Sanhe-Pinggu Earthquake (M8.0, 1679)Zone are explored by using a single-fold deep seismic reflection profile and a shallow seismic reflection profile. The results show that the crust beneath the investigated area is divided into upper and lower crust by a strong reflective zone at about 6~7 s TWT. The seismic reflection profile reveals that the deep fault in crust coincides well with the active fault in the shallow subsurface. Among all the faults, the deep fault has a larger dip angle, and it cuts the lower crust and crust-mantle transitional zone. The complex faults and crustal structures in deep and shallow are the tectonic background for Sanhe-Pinggu Earthquake, which controlled the earthquake activity in the area.