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中科院地质与地球物理所李娟副研究员等人利用三重震相,通过对多个深源地震P波和SH波波形及三重震相特征的拟合,同时获得了我国东北深俯冲地区上地幔转换带附近的P波和S波速度结构特征。研究发现,P波和S波速度在上地幔底部的差异性变化,表明除了温度异常外,还存在物质成分的异常。结合矿物物理高温高压实验结果,他们
Using the triple seismic facies, the associate researcher Li Juan and other researchers from the Institute of Geology and Geophysics of Chinese Academy of Sciences (CAS), obtained the fitting of the characteristics of P wave, SH wave and triple seismic facies in several deep-seated earthquakes and obtained the upper mantle transition Band near the P wave and S wave velocity structure characteristics. The study found that the P wave and S wave velocity in the bottom of the upper mantle changes, indicating that in addition to temperature anomalies, but also the existence of material composition anomalies. Combined with the results of mineral physics HTHP experiment, they