重磁法勘探在阿拉善左旗戈壁地区的综合应用

阿拉善左旗戈壁地区地层与岩体间具有明显的物性差异，为了研究该地区航磁异常的地质与地球物理特征，在研究区内，围绕航磁查证区开展了重、磁联合勘探方法的试验研究。对地面磁测平面数据进行化极、延拓、求导、小波变换等处理，圈定磁性体范围，再对重磁剖面数据进行圆滑、化极等处理，结合圈定磁性体的平面规模特征及物性资料对综合剖面进行2.5D人机交互反演，模拟出磁性体与围岩的断面形态，并通过钻探工程进行深部验证及模型修正，依据地质与地球物理资料进行综合研究，提出了该地区铁矿成矿类型及重磁联合勘探找矿模式，研究为该地区寻找类似矿床提供了有利的地球物理依据。

Integrated application of gravitational and magnetic geophysical methods in gobi area of Alxa Left Banner

There are obvious physical property differences between strata and rocks in the Gobi area of Alxa Left Banner.In order to study the geological and geophysical characteristics of aeromagnetic anomalies in this area,an experimental study on the combined gravity and magnetic exploration method was carried out around the aeromagnetic verification area in the study area.The surface magnetic survey plane data are processed by pole changing,extension,derivation,wavelet transform,etc.,the range of magnetic body is delineated,and then the gravity and magnetic profile data are processed by smoothing and pole changing.Combined with the plane scale characteristics of the delineated magnetic body and the physical property data,the 2.5D human-computer interactive inversion of the comprehensive profile is carried out to simulate the cross-section shape of the magnetic body and the surrounding rock,and the deep verification and model modification are carried out through the drilling engineering.The comprehensive research is carried out according to the geological and geophysical data,and the iron ore-forming type and the gravity and magnetic joint exploration and prospecting model in this area are put forward.It provides a favorable geophysical basis for searching for similar deposits in this area.