湖南邓阜仙半隐伏复式花岗岩体的二维形态研究

摘要

This paper describes in brief the geological background of Dengfuxian half-concealed compound granitic body.According to characteristics of density,gravity and magnetic anomaly and surface geology as well as regional geochemical composite anomaly,the au-thor holds that Dengfuxian gravity low is the reflection of Dengfuxian rock mass and its concealed part.Based on the gravity gradient zone,residual anomaly and zero line of vertical second derivative anomaly around the rock mass,the author determined the position and boundary of the semi-concealed rock mass,and chose a representative gravity profile to conduct two-dimensional morphological inver-sion.On such a basis,the author puts forward some new opinions in the aspects of the morphology,attitude,buried depth of the top and bottom as well as its contact relationship with the wall rocks,the distribution of the Batuan rock mass and its contact relationship with Hanba rock mass.%简要叙述了邓阜仙复式岩体的地质背景,根据密度特征、重磁异常特征、地表地质特征以及区域化探组合异常特征等,认为邓阜仙重力低是邓阜仙岩体及其隐伏部分的反映,并且根据环岩体重力梯级带、剩余异常和垂向二阶导数异常零值线确定了半隐伏岩体的位置与边界;选择了一条具有代表性的重力剖面对邓阜仙复式岩体进行二维形态反演,提出了邓阜仙半隐伏复式花岗岩体的形态、产状、顶底面埋深以及与围岩的接触关系、八团岩体的分布以及与汉背岩体的接触关系等多方面的新认识.