黑龙江地区上地幔各向异性研究

采用黑龙江数字地震台网2012-01～2014-07间23个宽频带地震台站记录的远震SKS波形资料，利用Splitlab 软件对黑龙江地区进行剪切波分裂的分析研究，使用最小能量法、旋转相关法和最小特征值法计算所有观测台站的SKS快波偏振方向和快、慢波的延迟时间，最终得到黑龙江省上地幔各向异性图像。结果显示，黑龙江地区上地幔地震各向异性比较明显，快波偏振方向与主张应力方向基本一致，与GPS得出的速度场方向相符，说明该地区的壳幔耦合可能存在垂直连贯性。

Study on Seismic Anisotropy of Upper Mantle Beneath Heilongjiang Region

Based on teleseismic SKS waveform data recorded from January 2012 to July 2014 at 23 broad-band seismic network stations of Heilongjiang province, we use Splitlab software to study the shear wave splitting in the region. The delay times between fast and slow wave arrival at each station are determined using both the minimum energy and waveform rotation-correlation method and the minimum feature value method. We calculate the SKS fast wave polarization direction and the fast and slow wave delay time for all observation stations, and acquire the image of upper mantle anisotropy in Heilongjiang region. The results show that the Heilongjiang regional upper mantle seismic anisotropy is more obvious and the fast wave polarization direction and principal tensile stress direction are basically consistent. Furthermore, as obtained by the GPS velocity field in the same direction, the coupling of the crust and upper mantle in the region present vertical coherence.