六面顶压机高温高压弹性波速测量装置样品室温度梯度的校正  

Correction of Temperature Gradient in Sample Cell of Pulse Transmission Experimental Setup on Multi-Anvil High Pressure Apparatus

作　　者：刘巍[1] 杜建国[1] 于泳[2] 白利平[1] 王传远[1] 

机构地区：[1]中国地震局分析预报中心,北京100036 [2]中国地震局地质研究所,北京100029

出　　处：《高压物理学报》2003年第2期95-100,共6页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金 (1 0 0 3 2 0 4 0 )

摘　　要：大腔体六面顶压机波速测量装置的样品室内存在着较大的温度梯度。根据实验观测的样品室内的温度分布数据和在一定温度条件下波速随温度升高呈线性变化的特征 ,运用理论分析和计算相结合的方法对样品的弹性波速进行了校正。以斜长角闪岩为例 ,对其实验测量的纵波速度 (vP)进行了校正 ,并与原来的数据作了对比 :波速校正量绝对值随着温度的升高逐渐增大 ;在 2 .0GPa、5 3 0℃时 ,样品X和样品Y校正后的vP 比未校正的vP 分别减小了 0 .2 70km/s(3 .3 % )和 0 .1 1 8km/s(1 .5 % )。这种方法明显地提高了波速测量结果的精度 。There is a remarkable temperature gradient in the sample cell in the pulse transmission experimental setup on a multi-anvil high pressure apparatus. The elastic wave velocity was corrected by combination of experiment, theory analysis, and computation in terms of the experimental data on temperature distribution in the sample and the linear decrease of temperature dependence of elastic wave velocities in rocks at a given temperature range. The experimental vP in amphibolite was corrected by this method and compared with the vP without correction: the absolute correction value turned greater as the temperature increased; at 530°C ,the greatest correction of velocities in the sample X and sample Y were up to -0.270 km/s and -0.118 km/s with the decreases of 3.3% and 1.5%, respectively. This method improves the accuracy of vP measurement in high pressure and temperature experiments, which is useful to interpret geophysical data by combining the experimental results.

关 键 词：六面顶压机 高温 高压 弹性波速测量装置 温度梯度 校正 斜长角闪岩 超声脉冲透射法 

分 类 号：O521.3[理学—高压高温物理] P585[理学—物理]