【摘要】 通过分析山东地区数字地震台网37个宽频带地震台站的远震SKS波形资料,使用最小能量法和旋转相关法求得每一个台站的SKS快波偏振方向和快、慢波时间延迟,获得了山东地区上地幔各向异性图像.该研究区的各向异性快波方向基本呈WNW-ESE方向,快、慢波时间延迟为0.73—1.71s.研究表明,山东地区上地幔存在明显的各向异性,各向异性快波方向与岩石层的伸展方向和GPS测量得到的速度场方向(ITRF2005参考框架下)基本一致.更多还原

【Abstract】 Based on teleseimic SKS waveform data recorded at 37 broad-band seismic stations in Shandong region,the split SKS fast-wave polarization direction and the delay time between fast and slow wave arrival at each station were determined by using both the minimum energy and waveform rotation-correlation method,and the image of upper mantle anisotropy in Shandong region was acquired.The fast-wave polarization direction in this region is basically WNW--ESE,and the delay time is about 0.73—1.71 s.Our result suggests that the upper mantle anisotropy obviously exists in Shandong region.The fast-wave polarization direction is generally consistent with the direction of lithospheric extension and GPS observed velocity(ITRF2005) vectors.更多还原