In this paper,the crustal thickness,Vp/Vs ratio and S-wave velocity beneath 21 temporary seismic stations deployed in the Dangyang Synclinorium of the Yangtze Craton were obtained using the H-κ stacking method of receiver function and joint inversion of multifrequency receiver function and surface wave dispersion.An average crustal thickness of 33.8 km and average Vp/Vs ratio of 1.75 were obtained in the Dangyang Synclinorium,suggesting that it has experienced thinning of the lower crust,but the body of crust still maintains typical cratonic structure.1～2 km-thick low-velocity layer at depths of 3～4 km was imaged beneath most stations,which may be related to the enrichment of shale gas strata with high porosity and low density within the depth range.Our study suggests that passive source data from dense temporary seismic stations can provide valuable references for oil-gas exploration.
关键词
当阳复向斜/页岩气勘探/低速薄层/接收函数和面波联合反演/接收函数H-κ叠加
Key words
Dangyang Synclinorium/Shale gas exploration/Low-velocity thin layer/Joint inversion of receiver function and surface wave dispersion/H-κ stacking method of receiver function
维普
万方数据