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根据2011年在鄂尔多斯地区新架的51套宽频带流动地震台数据,结合区域数字地震台网138个固定台站和2007年华北流动地震台阵连续一年的地震记录,基于背景噪声成像的基本原理与方法得到了华北克拉通中西部地区6~36 s的瑞利面波群速度分布图像。6~15s的成像结果很好地对应于上地壳的隆起和塌陷盆地构造;16~30 s的成像结果揭示了大同盆地和汾河谷地西侧可能存在中下地壳低速层;30~36 s的成像结果反映了华北克拉通地壳东薄西厚的总格局,和断陷盆地下方莫霍面相对隆起的局部特征。
According to the data of 51 sets of broadband mobile seismographs in the new shelves in Erdos region in 2011 and the seismograph records of 138 fixed stations in the regional digital seismograph network and the North China mobile seismic array in 2007 for one year, based on the basic background noise imaging The velocity and distribution of Rayleigh polygons from 6 ~ 36 s in the central and western part of North China Craton were obtained by the principle and method. The imaging results from 6 to 15 s correspond well with the uplift and collapsed basin structures of the upper crust. The imaging results from 16 to 30 s reveal that there may exist low-velocity crust in the middle and lower crust in the Datong Basin and the Fen River valley. The results of the imaging reflect the general pattern of the crust in the North China Craton and the local features of the relative uplift of the Moho in the lower part of the fault basin.