关键词: 二维模型, 密度界面反演, 滑脱面

Abstract: 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.

Key words: Two-dimensional model, Density-inteface inversion, Detachment