Subsection Feature of the Deep Structure and Material Properties of Longmenshan Fault Zone

• 责任者：Lou Hai (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Wang Chunyong
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17(5)
• 关键词：深部构造 ; deep-seated structure ; 断层分段性 ; fault segmentation ; 龙门山断裂带 ; Longmenshan Fault Zone
• 页码：p.128-141
• 图表：8 illus., 1 table, 56 refs.
• 分类号：0300
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

With the broadband seismic records acquired from permanent and mobile digital seismic stations around Longmenshan Fault Zone(LMFZ), the structure of crusts and uppermost mantle was investigated by using integrative seismic and geophysical methods. The study of the deep structure shows remarkable subsection diversity in deep structure and in material properties along the LMFZ. The H-k stack of teleseismic receiver functions was deployed to obtain the crustal thickness and velocity ratio of P and S waves. The result shows that the crustal thickness increases from east to west in general. The minimum thickness is 37.8 km and the maximum are 68.1 km. Across LMFZ from southeast to northwest, the crustal thickness is increasing sharply, from 41.5 km in the southeast to 52.5 km in the northwest. The difference in the behavior of rupture and the distribution pattern of aftershocks may have resulted from the deep structure variation of the fault zone.