Abstract: This paper deals with three dimensional inversion of low density(low velocity)anomalous zone in the middle and lower crusts in the Wutai region by use of the method of robust maximum likelibood to obtain its spatial existence for this anomalous zone and to carry out a geological in-terpretation along with shallow local negative anomaly of gravity as well as other geophysical characteristics. Their mechanism has been descussed as well.

Key words: Low-velocity zone, Gravity anomaly, Three-demensional gravity inversion, Shanxi

摘要： 运用健全的极大似然法对山西五台地区中、下地壳中存在的低密度(低速度)异常体进行了三维反演,求出该异常体的空间赋存状况,并结合浅层局部重力负异常及其它地球物理特征进行地质解释,还就其形成机制进行了讨论。

关键词: 低波速带, 重力异常, 三维重力反演, 山西