摘要
构造变异部位是热液型铀矿定位的有利空间,解决构造变异部位复杂三维形态分析问题对热液型铀矿定位具有重要意义。为探究瞬变电磁三维拟合技术在解决构造变异部位复杂三维形态分析中的效果,文章以甘肃龙首山芨岭地区为例,从定源回线装置测量、三分量数据处理、地质体三维形态分析等角度对瞬变电磁三维建模方法进行了应用,并与前人中心回线瞬变电磁测量视电阻率结果进行了对比,结果认为:引入三分量测量提升了数据量,为地质体复杂三维形态分析提供了必要的网格数据;瞬变电磁三维拟合建模结果的横向、纵向分辨率均优于前人测量视电阻率结果。甘肃龙首山芨岭地区瞬变电磁三维拟合应用表明:该技术对解决复杂构造变异部位三维形态分析问题,尤其是局部的形态、展布、埋深等具有较好效果,可较好的应用于热液型铀矿床浅部构造变异部位探测、断裂带及褶皱形态分析工作中。
The location of structural variation is the key factor to control the positioning of hydrothermal uranium deposits.Therefore,it is of great significance to solve the three-dimensional morphological analysis in the positioning of hydrothermal uranium deposits and help the the exploration breakthrough in new area,new target layer.In order to explore the effect of TDEM three-dimensional fitting technique of complex three-dimensional shape analysis of structural variation parts,the measured data of Jiling area in Longshoushan Gansu Province was studied from the perspective of fixed-source loop device measurement,three-component data processing,and three-dimensional shape analysis of geological body.The studied result was compared with the apparent resistivity results of the previous central loop transient electromagnetic measurement.It was found that the introduction of three-component measurement can improve the data density and provide necessary grid data for complex threedimensional shape analysis of geological bodies.The transverse and longitudinal resolution of the transient electromagnetic 3D fitting modeling results are better than the previous measured apparent resistivity results.The application of transient electromagnetic 3D fitting in Jiling area showed that this technique produced good effect on solving the problem of 3D shape analysis of complex structural variation parts which will help the detection of shallow structural variation parts of hydrothermal uranium deposits,fracture zone and fold shape analysis.
作者
雷阳
牛立群
王芳芳
LEI Yang;NIU Liqun;WANG Fangfang(Research Institute No.203,CNNC,Xi’an,Shaanxi 712000,China)
出处
《世界核地质科学》
CAS
2023年第3期825-834,共10页
World Nuclear Geoscience
关键词
瞬变电磁法
热液型铀矿
三分量测量
三维拟合建模方法
三维形态分析
TDEM method
hydrothermal uranium deposit
3 component measurement
3 dimensional modeling technique
3 dimensional shape analysis
