利用接收函数方法估算重庆及相邻地区地壳的厚度

THE CALCULATION OF CRUST THICKNESS OF CHONGQING AND NEAR AREA WITH RECEIVER FUNCTION METHOD

利用中国地震台网36个台站记录的远震资料,采用接收函数扫描法和线性反演方法对重庆及其相邻地区的壳幔速度结构进行了研究,获得了研究区内地壳厚度、Vp/Vs以及壳幔速度的分布特征。通过接收函数扫描(H-κ)法与线性反演法得到台站下方地壳厚度,发现研究区地壳厚度变化剧烈。研究结果表明重庆区域地壳厚度最厚的地段为城口(C) HK)台站,有50. 4Km,最薄的地方为荣昌(ROC台站,为38. 5Km,重庆的中部地区厚度为41Km～45Km。

According to the far seismic data,the crust mantle velocity structure of Chongqing and near area is studied with receiver function scanning and linear inversion method,and the crust thickness,Vp/Vs and crust mantle velocity distribution characteristics of the study area are achieved.The crust thickness beneath the station is achieved with receiver function scanning（H-k）method and linear inversion method,which shows the intense variation of crust thickness of the study area.The study result shows the thickest spot of crust thickness in Chongqing area is Chengkou（C）HK station,ie 50.4km,whereas the thinnest one is Rongchang（ROC）station,only 38.5km.The thickness is 41km-45km in the central part of Chongqing.