地面高精度磁法测量在青海某区地质矿产调查中的应用  

Application of high precision ground magnetic survey in geological and mineral survey in a district of Qinghai

作　　者：刘仕刚[1] 陈向平 袁霆[1] 刘钧沅 王铎道 刘高杰 LIU Shigang;CHEN Xiangping;YUAN Ting;LIU Junyuan;WANG Duodao;LIU Gaojie(Tianjin North China Geological Exploration General Institute,Tianjin 300170,China)

机构地区：[1]天津华北地质勘查总院,天津300170

出　　处：《矿产勘查》2024年第5期827-836,共10页Mineral Exploration

基　　金：青海省地质勘查基金项目(KD2012-04)资助。

摘　　要：为综合研究青海某区成矿远景和找矿潜力,本文通过对该区1∶5万地面高精度磁法测量数据资料进行一系列位场转换处理,分析全区磁场分布规律和异常信息特征,结合地质背景、岩石磁性特征和化探水系沉积物测量等资料着重对M1异常进行解释推断,圈定1处与基性—超基性岩关系密切的铜钴镍多金属A类找矿靶区,采用2.5D人机交互反演,拟合出异常体埋深、形态等赋存情况。本研究建立的与基性—超基性岩带有关的铜钴多金属矿的找矿模型,为邻区甚至布青山—阿尼玛卿构造带区域内的找矿工作提供借鉴经验。In order to study the metallogenic prospect and prospecting potential of a certain area in Qinghai Province,this paper conducted a series of potential field conversion processing on the 1∶50,000 high-precision surface magnetic survey data in this area,analyzed the magnetic field distribution and abnormal information characteristics of the whole area,and focused on the interpretation and inference of M1 anomaly in combination with the geological background,rock magnetic characteristics and geochemical stream sediment measurements.A class A target of copper-cobalt-nickel polymetals,which is closely related to basic-ultrabasic rocks,was identified,and the buried depth and morphology of anomalous bodies were fitted by 2.5D human-computer interactive inver-sion.The prospecting model of copper-cobalt polymetallic deposits related to basic-ultrabasic rock belt established in this study provides reference experience for the prospecting work in adjacent areas and even in the Buqingshan-Animaqing structural belt.

关 键 词：地面高精度磁法 位场转换 2.5D人机交互反演 阿尼玛卿构造带 

分 类 号：P631.2[天文地球—地质矿产勘探]