• 责任者：Tang Xingong (Key Laboratory of Exploration Technologies for Oil and Gas Resources of MOE ; Yangtze University ; Jingzhou 434023 ; China) ; You Shuangshuang
• 刊名：Seismology and Geology
• 出版年：2012
• 卷期：34(1)
• 关键词：地壳结构 ; crustal structure ; 龙门山断裂带 ; Longmenshan Fault Zone
• 页码：p.28-38
• 图表：10 illus., 1 table, 18 refs.
• 分类号：0400
• 出版序号：20130061
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

Using commercial software of Geosoft, gravity inversion for 6 lines of Bouguer gravity anomaly data was carried out under the constraint of deep seismic sounding (DSS) data obtained in the last two decades. The depth and distribution of sediments, crustal thickness and Conrad discontinuity of Longmenshan tectonic zone and its adjacent area (100° ～ 105°E, 28° ～ 33°N) are obtained. The results indicate that the crustal density structure of the Longmenshan Fault zone is obviously different between the two sides. The whole fault of Longmenshan displays as a SN-direction gravity gradient zone,with each of its interfaces in the crust under the faults being offset. The displacements of the Conrad and Moho discontinuities are 6 ～ 7 km and 3 ～ 5 km, respectively. The sharp change in crustal thickness is maybe one of the causes of strong earthquakes in this area.