祁连山—河西走廊地壳速度结构及速度与电性的联合解释

联合利用天然地震和人工地震测深资料对祁连山—河西走廊地区进行地壳三维速度结构反演，获得了该区地壳三维速度结构图像．给出了按5km间隔的中、上地壳速度切面和地壳速度结构与莫霍界面等深线图．综合大地热流实测结果和深部岩石物性等，建立了下地壳部分熔融的韧性模型．给出了计算地震波速度和电阻率的方法与公式，进行了部分熔融状态下深部电性与地震波速度的联合数值模拟和联合解释，其结果与实测的基本一致．分析了各构造单元之间下地壳电阻率、速度与热流的关系，对下地壳部分熔融程度进行了估计．

THE COMBINED INTERPRETATION OF CRUSTAL VELOCITY AND ELECTRICAL RESISTIVITY IN QILIANSHAN MOUNTAIN-HEXI CORRIDOR REGION

The 3-D crustal velocity structure and tomographic image, including sectionvelocity from surface to 25km with interval 5km, RMS velocity in crust and depthdistribution of Moho, in Qilianshan Mountain--Hexi Corridor inversed by earthquakesconsotrainted with DSS data was gotAftor consideration of heat flow and rock physical properties, the ductile modelwith partial melting of lower crust was set up. The method and mathematicalrepresentations to calculate seismic velocity and tesistivity were shown. Thesimultaneous numerical modelling of velocity and resistivity was calculated and thecombined interpretation of it was performed by means of geotherm, the theoreticalresults agree basically with practical data. The relationship of electric conductivity,velocity and heat flow among various geological units was analysed and the partialmelting degree was got This is first research results for the Northern .Margin ofQinghai-Xizang (Tibet) Plateau, and is important for understanding of the evolutionand dynamics of Qinghai--Xizang (Tibet) Plateau.