突泉盆地磁性体重力场剥离的方法技术及岩体三维显示  

THE METHOD OF USING GRAVITY AND MAGNETIC DATA FOR GRAVITY FIELD SEPARATING IN TUQUAN BASIN AND 3D INVERSION OF ROCK

作　　者：刘玲[1] 张明华[2] 田黔宁[1] 尚龙平 

机构地区：[1]北京勘察技术工程有限公司,北京100085 [2]中国地质调查局发展研究中心,北京100037

出　　处：《物探与化探》2013年第2期242-245,共4页Geophysical and Geochemical Exploration

摘　　要：各地层中赋存的岩体可能形成局部重力异常,对重力资料的密度界面反演计算可靠性产生影响,所以在进行反演计算之前去除岩体引起的异常影响,可增强密度界面反演的可靠性。笔者以突泉盆地重磁异常资料为基础,通过重磁异常特征分析,切取多条剖面进行2.5D正反演计算,进而对磁性岩体形成的重力场进行剥离,增加了重力场密度界面反演计算的可靠性;同时构建岩体的三维地质模型,清晰反映岩体的空间分布,为对目标地质体进行三维地质填图方法做了初步探索。The gravity anomaly produced by rock in the strata will affect the reliability of the density interface inversion,so we should remove the influence before the calculation to increase the inversion reliability.In this paper,the authors used gravity and magnetic data in Tuquan basin to invert the rock and got the gravity produced by the rock with which we can perform the separation from the whole gravity field.3D geological model was also established to reflect the spatial distribution of rock.

关 键 词：突泉盆地 重磁异常 2 5D正反演 剥离法 岩体三维显示 

分 类 号：P631[天文地球—地质矿产勘探]