激发极化法在莱阳岚子地区石墨矿勘查中的应用  

The Application of Induced Polarization Method in the Exploration of Graphite Deposits in Lanzi Area,Laiyang

作　　者：孙华敖 马方 王超 Sun Huaao;Ma Fang;Wang Chao(Geological Exploration Center,Shandong Third Geological and Mineral Exploration Institute,Yantai Shandong 264000,China)

机构地区：[1]山东省第三地质矿产勘查院地质勘查中心,山东烟台264000

出　　处：《工程地球物理学报》2025年第1期136-143,共8页Chinese Journal of Engineering Geophysics

基　　金：2022年度山东省地质勘查项目(编号:鲁勘字(2022)43号);2023年度科技创新基金(编号:SYKJ-202302)。

摘　　要：莱阳市岚子地区石墨矿主要赋于古元古代荆山群陡崖组徐村段,石墨矿石类型主要为含石墨黑云变粒岩型。在莱阳市岚子地区石墨矿勘查中,先通过开展激电测深工作,圈定激电异常,分析石墨矿的激电异常特征,再通过槽探与钻探对异常查证,以了解激电异常和矿体的对应关系。经槽探与钻探验证,低阻高极化的激电异常与石墨矿(化)体在平面及空间位置上基本吻合,说明激发极化法在该区石墨矿勘查中合理有效,低阻高极化异常是该地区石墨矿的重要物探找矿标志。此外,本地铜矿化体及黑云片岩视极化率在6.0%以上,视电阻率在420Ω·m左右,含石墨黑云变粒岩视极化率在2%左右,视电阻率在90Ω·m左右。The graphite ore in the Lanzi area of Laiyang occurs in the Xucun section of the Paleoproterozoic Jingshan Group’s Douya formation.The graphite ore is frequently observed in the graphitiferousbiotite granulite.In the graphite ore exploration of the Lanzi area of Laiyang,the induced polarization(IP)anomalies are delineated and the IP characteristics are analyzed by means of the induced polarization method,the IP anomaliesare checked to get the relationship between the IP anomalies and graphite mineralization body by means of trenching and drilling.By the verification of trenching and drilling,the IP anomaly with low resistance and high polarization is basically consistent with the graphite mineralization body in both plane and space positions.It shows that the method of IP is reasonable and effective in graphite exploration in this area.The IP anomalies with low resistance and high polarization serve as important geophysical prospecting indicators of graphite deposits in this area.Besides,in this area the copper mineralization bodies and biotite schist’s apparent polarization is more than 6.0%,and its apparent resistivity is about 420Ω·m.Graphitic biotite granulite’s apparent polarization is about 2%,and its apparent resistivity is about 90Ω·m.

关 键 词：激发极化法 石墨矿 激电异常 

分 类 号：P631.3[天文地球—地质矿产勘探]