地震波反演是认识地球深部结构的有效手段之一,尽管近年来高温高压波速就位测量的实验技术得到了发展,所能达到的压力已很高,但仍然缺乏作为反演基础的地球深部物质在高温高压条件下的波速及其影响因素的实验数据。笔者选择蛇纹石化碱性橄榄玄武岩,在2.0～5.0GPa和温度达1500℃范围内测量了P波速度,探讨了温度、压力、相变及其蛇纹石脱水对P波速度的影响,发现在熔融前存在声软化效应,并分析了声软化效应产生的机制。 Seismic wave inversion is one of the most effective methods to recognize the deep structure of the Earth. Although the experimental techniques for measuring the velocities at high temperature and high pressure in recent years have been developed, the pressure that can be achieved is already very high. However, Experimental data of wave velocity and its influencing factors under high temperature and high pressure. The author selected the serpentinized basic olivine basalt to measure the P-wave velocity in the range of 2.0 ~ 5.0GPa and the temperature of 1500 ℃, and discussed the influence of temperature, pressure, phase change and serpentine dehydration on the P-wave velocity, and found that Acoustic softening effect exists before melting, and the mechanism of acoustic softening effect is analyzed.