综合地球物理方法在赛坝沟地区矿产地质调查中的应用  

The application of comprehensive geophysical methods to mineral geological survey in Saibagou region

作　　者：符坚 张景业 梁家乐 娄彬 FU Jian;ZHANG Jingye;LIANG Jiale;LOU Bin(Henan First Geology and Mineral Survey Institute Co.,Ltd.,Luoyang 471023,Henan,China;Key Laboratory of Au-Ag-Polymetallic Deposit Series and Deep-seated Metallogenic Prognosis of Henan Province,Luoyang 471023,Henan,China;Key Laboratory of Precious Metals Analysis and Exploration Technology,MNR,Luoyang 471023,Henan,China)

机构地区：[1]河南省第一地质矿产调查院有限公司,河南洛阳471023 [2]河南省金银多金属成矿系列与深部预测重点实验室,河南洛阳471023 [3]自然资源部贵金属分析与勘查技术重点实验室,河南洛阳471023

出　　处：《矿产勘查》2023年第8期1440-1449,共10页Mineral Exploration

基　　金：中国地质调查局项目“青海省乌兰县赛坝沟地区J47E020009、J47E020010两幅1∶5万区域地质矿产调查”(12120114018216)资助。

摘　　要：本文基于赛坝沟地区1∶5万矿产地质调查工作,初步查明研究区磁场总体特征及磁异常分布特征,了解磁场与构造、岩石及矿产的相互联系,结合地质和化探工作,筛选重要异常,为地质找矿提供有利靶区。通过1∶5万高精度磁测扫面,快速圈定磁异常,采用大比例尺磁测剖面和激电中梯剖面进行异常查证,对C-1典型异常进行成因分析和异常体埋深的半定量解释,系统总结了研究区地质特征和磁场特征,圈定磁异常区10处,并对C-1异常进行工程验证。研究结果证明综合地球物理方法在该区矿致异常圈定中的有效性和适用性,同时总结了异常圈定的基本方法和经验,对成矿地质背景相似地区的找矿工作,具有一定的指导意义。Based on the work of 1∶50000 mineral geological survey in Saibagou region.The general characteristics of magnetic field and distribution characteristics of magnetic anomalies in the survey area are preliminarily identified,and the interrelationship between magnetic field and structure,rocks and minerals is understood.In combination with geological and geochemical exploration work,important anomalies are screened to provide favorable prospecting targets.Through 1∶50000 high-precision magnetic survey surface scanning,the magnetic anomaly was quickly delineated,the anomaly was verified by large-scale magnetic survey profile and IP midscale profile,the cause analysis of the C-1 typical anomaly and the semi-quantitative interpretation of the depths of abnormality were carried out,the geological characteristics of the study area and the characteristics of the magnetic field were systematically summarized,ten magnetic anomaly areas were delineated,and the C-1 anomaly was verified by engineering.The results prove the validity and applicability of the comprehensive geophysical method in the delineation of ore-induced anomalies in this area,and summarize the basic methods and experience of the delineation of anomalies,which has certain guiding significance for the areas with similar metallogenic geological background.

关 键 词：赛坝沟地区 高精度磁测 激电中梯 异常圈定 矿产地质调查 

分 类 号：P631[天文地球—地质矿产勘探]