应县～淄博剖面重力、地震测深联合解释  

JOINT GRAVITY-SEISMIC INTERPRETATION FOR YINGXIAN-ZIBO PROFILE

作　　者：刘昌铨[1] 方盛明[1] 李长法[1] 

机构地区：[1]国家地震局地球物理勘探中心

出　　处：《地震地质》1996年第4期367-374,共8页Seismology and Geology

基　　金：地震科学联合基金

摘　　要：利用应县～淄博地震测深解释的二维速度结构，并将速度值转换为密度值，提供初始基本模型。运用任意多边形截面的块状二度体模型计算重力异常值，反演二维块状密度分布。计算结果表明：上、中地壳之间的滑脱面是一较明显的密度界面；下地壳底部的强速度梯度层──壳幔过渡带是一高密度层；五台山下部中、下地壳内的低速度块体是低密度块体。Using 2-D velocity structure from interpretation of DSS data of Yingxian-Zibo profile we present preliminary basic model.The values of gravity anomaly are calculated and the 2-D block density distribution is inversed making use of the block 2-D body mdel of any polysonal section.The computed results show that the detachment between the upper and the middle crusts is an obvious density interface.The strong velocity gradient,i.e.the crust-mantle transition zone in the bottom of the lower crust is a high density layer and the lower-velocity block within the middle-lower crusts beneath Wutai Mt.is a lower-density block.

关 键 词：地震勘探 重力勘探 地震测深 滑脱面 数据解释 

分 类 号：P631.14[天文地球—地质矿产勘探] P631.44[天文地球—地质学]