山西省五台县东腰庄金矿地球物理特征及物探异常示踪  

Geophysical features and geophysical exploration of Dongyaozhuang gold mine in Wutai County,Shanxi Province

作　　者：王计海 WANG Ji-hai(Shanxi Third Geological Engineering Survey Institute,Jinzhong 030620,China)

机构地区：[1]山西省第三地质工程勘察院,山西晋中030620

出　　处：《世界有色金属》2023年第21期127-129,共3页World Nonferrous Metals

摘　　要：东腰庄金矿为五台山绿岩带型金矿的典型矿床,矿体赋存于五台群台怀亚群鸿门岩组的绢云钠长片岩层中,受韧性剪切带的控制。矿床为变质热液型,与变质热液有关的蚀变主要有钾化、黄铁矿化、碳酸盐化和硅化,其次为钠化、绢云母化、绿泥石化和电气石化。主要矿石类型为黄铁矿化绢云钠长片岩和黄铁矿化硅化绢云钠长片岩。矿区地球物理特征表现为矿石与围岩之间存在明显的极化率差异,以2.0%等值线圈定的视极化率异常分为两部分,编号为JD1号、JD2号;围岩与矿石间有明显的电阻率差异,西北区域为低阻分布区,高阻异常区分两部分。通过对异常区进行的钻孔验证研究,JD1号异常区高视极化率、中低视电阻率异常见矿较好;JD2号异常高视极化率值、高视电阻率异常为见矿较差。物探激电异常对东腰庄金矿探矿工作具有指导作用,低阻高激化区域可以确定为找矿地段。Dongyaozhuang gold mine is a typical deposit of greenstone belt gold mine in Mount Wutai mountain.The ore body mainly exists in the long schist formation of Hongmen Formation,and the ore body is controlled by the toughness shear zone.The deposit is of metamorphic hydrothermal type,and the alteration related to metamorphic hydrothermal mainly includes potash,pyrization,carbonization and silification,followed by natritization,sericite,chlorite and electrical petrochemical.The main ore types are pyritic sodium long schist and pyrified silicate sodium sericite long schist.The geophysical characteristics of the mining area show obvious polarisation difference between ore and surrounding rock,which is divided into two parts based on 2.0%contour coil,numbered as JD1 and JD2;there is obvious resistivity difference between surrounding rock and the northwest region is a low resistance distribution area,with high resistance and high resistance anomaly in the southwest.Through the drilling verification study in the abnormal area,the high visual polarization rate and low visual resistivity in the abnormal area of JD1 are good;the abnormal high visual polarization value and high visual resistivity in JD2 are poor.The exciting abnormal area has a guiding role in the prospecting work of Dongyaozhuang gold mine,and the geophysical abnormal area can be determined as the prospecting area.

关 键 词：东腰庄金矿 地球物理特征 异常验证 

分 类 号：P618.51[天文地球—矿床学]