论文部分内容阅读
本文利用阿尔金地区的宽频地震数据,对布设在该区的10个宽频地震台站用接收函数方法进行了速度结构反演。反演的初步结果发现,若羌至花土沟剖面在20km深度处有一条厚度达5～10km的低速带断续出现,莫霍界面呈台阶状展布,北部浅,南部深;塔里木盆地南缘的地壳厚度为40～42km左右;在阿尔金南、北缘断裂两侧台站下方莫霍深度的错断约6.5～8km,在柴达木盆地北缘,莫霍面的深度达50km以上,S波速为4.5km/s。
In this paper, broadband seismic data in the Altyn region are used to invert the velocity structure of 10 broadband seismic stations deployed in this area using the receiver function method. The preliminary results of inversion show that there is a discontinuous occurrence of a low velocity belt with a thickness of 5 ~ 10 km at the depth of 20 km from Ruoqiang to Huatuogou profiles, with the Moho interface being stepped and spreading to the north and shallow in the south, while in the south of Tarim Basin The crustal thickness of the margin is about 40-42 km. The fault depth of Moho beneath the stations on both sides of the Altyn Tagh and northern margin is about 6.5-8 km. In the northern margin of the Qaidam basin, the depth of the Moho is more than 50 km , S wave velocity of 4.5km / s.