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利用YJ-3000t压力机的弹性波速度测量装置在4.5GPa,25～1360℃条件下测量了黑云二长片麻岩的纵波速度,发现随温度升高,岩石的纵波速度经历了缓慢下降-逐渐升高-缓慢下降的复杂过程。详细观察相同条件下的实验产物证实黑云二长片麻岩向榴辉岩的转变是岩石纵波速度随温度升高而升高这一异常现象的主要原因,讨论了岩石中矿物相变与岩石纵波速度变化的关系。这一实验结果为初步了解陆陆俯冲过程中,俯冲陆壳的弹性波速度结构演化提供了高温高压实验资料。
The longitudinal wave velocity of biotite monzogranite was measured at 4.5GPa and 25 ~ 1360 ℃ by the elastic wave velocity measuring device of YJ-3000t press. It was found that the longitudinal wave velocity of the rock experienced a slow decline with increasing temperature. Gradually rising - slow down the complex process. The detailed observation of the experimental products under the same conditions confirms that the transition of biotite gneiss to eclogite is the main reason for the anomalous phenomenon that the P-wave velocity increases with temperature, and discusses the relationship between the mineral phase transition in rock and the rock The relationship between longitudinal wave velocity changes. The results of this experiment provide high-temperature and high-pressure experimental data for the preliminary understanding of the evolution of the elastic wave velocity structure of subducted continental crust during the subduction of land and land.