中文摘要：

本文应用化极、水平及垂向导数、向上延拓、视磁化强度填图及磁性界面反演等方法处理了龙门山及相邻地域最新的航空磁测数据,分析了龙门山及相邻地域的航磁异常展布特征.研究结果表明：1）龙门山造山带与其东、西两侧可划分为三个磁异常区：松潘—甘孜磁异常区、龙门山负磁异常带、四川盆地磁异常区;三个区、带的地壳介质磁性结构存在明显差异.2）根据该区航空磁异常场的分布特征分别研究了,松潘—甘孜地块、龙门山造山带和四川地块的磁场特征.3）除识别前人识别的断层外,还推断鲜水河ES延伸甘洛—雷波北断裂作为四川盆地与滇西的界带.4）航空磁异常,磁性体上、下界面及磁源体深度的空间分布特征与汶川MS8.0大地震及芦山地震发生相关.

英文摘要：

In this paper,we analyzed the aeromagnetic anomaly data in the Longmenshan mountains and adjacent areas by different methods,such as vertical magnetization,horizontal and vertical derivation,upward continuation,frequency and wavelet transform.The results show that the characteristics of magnetic anomalies suggest this area could be divided into three magnetic anomaly blocks which have different medium properties in crust.They are the SongpanGarzêmagnetic anomaly area,the Longmenshan negative area,and the magnetic anomaly area in the Sichuan basin. The analysis of aeromagnetic anomaly characteristics reveals spatial distribution of the tectonic units and major faults in the Longmenshan mountains,Sichuan basin and the plateau in western Sichuan.There is a correlation between the aeromagnetic anomalies,top and bottom depths of the magnetic bodies and the 2008 Wenchuan MS8.0earthquake.