柴达木盆地岩石热导率的饱水试验研究及热流校正  

EXPERIMENTAL RESEARCH ON THE THERMAL CONDUCTIVITY OF WATER-SATURATED ROCKS AND CORRECTION TO THE HEAT FLOW OBSERVED IN CAIDAM BASIN

作　　者：杨淑贞[1] 张文仁[1] 李国桦[1] 沈显杰[1] 

机构地区：[1]中国科学院地质研究所,北京100029

出　　处：《岩石学报》1993年第2期199-204,共6页Acta Petrologica Sinica

基　　金：国家自然科学基金

摘　　要：柴达木盆地沉积了巨厚的孔隙质泥砂岩。为了对22个实测热流进行饱水校正,选定132个岩样进行了风干和饱水状态下热导率的对比研究。在进行系统的统计分析和对比的基础上,重点研究了热导率与岩性、地层年代和深度之间的相关性,得出合理的饱水校正系数,据此对热流值进行了饱水校正。经饱水校正后的柴达木盆地热流值的变化范围为39～76 mW/m^2,平均热流值约为57±13 mW/m^2。Extremely thick porous clastic rocks are deposited in Caidam Basin. To carry out an appropriate correction for water-saturation to heat flow observed in the basin, 132 rock specimens are selected to conduct a comparative study between dry and water-saturated thermal conductivity experiments. On the basis of systematic statistical analysis and comparison of the experimental results, an emphasis of study is put on correlations between thermal conductivity and lithology, strata age and occurrence depth, which result in obtaining a set of correction factors for water-saturation. The heat flow values corrected for water-saturation range from 39 mW/m^2 to 76 mW/m^2 with an average value of 57±13 mW/m^2.

关 键 词：岩石 热导率 风干岩样 饱水系数 

分 类 号：P584[天文地球—岩石学]