【摘要】 首先运用叠加谱比法, 对新疆地区22个数字化台网台站、乌鲁木齐台站以及周边的7个台站1999~2003年上半年所记录的1 156个宽带垂直记录, 进行了处理, 得到了与各射线相对应的Q0 值(1 Hz处的Q值)和频率相关因子η. 在此基础上, 应用反投影技术, 得到了新疆地区1°×1°网格的Q0 值和η值的分布图象. 结果表明: 在塔里木地台及西伯利亚地台边缘, Q0 值较高, 为300~450; 而在南部的西昆仑褶皱系、松潘甘孜褶皱系, Q0 呈现出低值,在150~250的范围内变化; 在北部的准葛尔褶皱系和天山褶皱系, Q0 呈现出较低的值, 在250~300的范围内变化,η值的变化范围为0.5~0.9.更多还原

【Abstract】 In the study, we collected 1156 broadband vertical components recorded at 22 digital network stations in Xinjiang region, rümqi station, and 7 stations in the adjacent regions during the period of 1999~2003. The records were firstly processed by the stacked spectral ratio method to obtain Q 0 ( Q at 1 Hz) and the frequency correlation factor η corresponding to each path. Based on the results, the distribution images of Q 0 and η in 1°×1° grids for Xinjiang region were gained by the back projection technique. The results indicate that Q 0 was higher (300~450) in the Tarim platform and the edges of Siberian platform, while Q 0 was lower (150~250) in the southern regions as west Kunlun fold system and Songpan Ganzi fold system. In the northern regions as Junggar fold system and Tianshan fold system, Q 0 was also lower (250~300) and η was varying between 0.5 and 0.9.更多还原