SASW及MASW方法在隐伏断层探测中的应用  

Application of SASW and MASW to buried fault detection

作　　者：贾辉[1] 何正勤[2] 叶太兰[2] 

机构地区：[1]北京市勘察设计研究院有限公司,北京100038 [2]中国地震局地球物理研究所,北京100081

出　　处：《地球物理学进展》2010年第2期709-713,共5页Progress in Geophysics

基　　金：地震科学联合基金(A07037)资助

摘　　要：针对地壳浅部介质横向变化大的特点,用瞬态瑞利波SASW与MASW方法对河北夏垫断裂进行了探测与数据处理分析.分别用时间域互相关法和频率域f-k分析法提取频散曲线,然后进行反演得到横波速度结构.实验结果表明瞬态瑞利波法在应用中便捷、灵活,对于探测地表介质中非均匀异常体及断裂向浅部的延伸情况具有独特的应用前景.In accordance with the characteristic of great lateral variation in shallow crust,SASW and MASW are used to detect the xiadian fault.In data processing we use the methods of time-domain cross-correlation and f-k transformation to derive dispersion images respectively,then get the S-wave velocity structure by inversion.The result of the test shows transient rayleigh wave method is compact,convenient and reliable.Especially in lateral inhomogeneous media,by the variability of near-surface velocity structure carl be revealed effectively and it will have a special application prospects in detection of surface anomalous bodies and downward extension of near-surface faults.

关 键 词：瞬态瑞利波 频散 浅层速度结构 SASW MASW 

分 类 号：P631[天文地球—地质矿产勘探]