内蒙古道嘎金矿区地质特征及找矿地球物理标志  

Geological characteristics and geophysical prospecting signs of Daoga gold mining area in Inner Mongolia

作　　者：王承洋[1] 韦烈民 王小武 徐爱军[4] 王文旭[5] 王可勇[1] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]四川华源矿业勘查开发有限责任公司,成都610072 [3]山东省第八地质矿产勘查院,山东日照276826 [4]吉林海沟黄金矿业有限责任公司,吉林安图133611 [5]核工业208大队,内蒙古包头014010

出　　处：《世界地质》2015年第2期379-384,共6页World Geology

基　　金：内蒙古自治区地质勘查基金项目(09-1-KC-181)

摘　　要：道嘎金矿化区位于内蒙古自治区额济纳旗境内,地处北山成矿带东段.区内主要矿体均赋存于碎石山组浅变质碎屑岩以及华力西期闪长岩体中,矿体的产出主要受北东向和近东西向断裂构造控制.区内金矿化类型以含金石英脉型为主,主要发育角砾状含硫化物石英脉和含电气石石英脉两种类型矿石,矿床成因属中温热液脉型金矿床.选择成矿地质条件最为有利的I号和Ⅳ号两条矿脉所在区域展开激电中梯测量工作,结果表明,已知矿脉出露附近激电异常较明显,其异常范围的视极化率在5％～9％之间,视电阻率在50～300Ω＆#183;m之间.因此,该区找矿有效的地球物理标志为低电阻高极化率异常.Daoga gold mining area is located in the east section of Beishan metallogenic belt, Ejina County, Inner Mongolia. The orebody of this area occurred in shallow metamorphic clastic rocks of Suishishan Formation and Hercynian diorite, and the distributions of the orebody are strictly controlled by NE and EW fault structures. Gold- bearing quartz vein is the main mineralization type in this area, and the ore is mainly formed by brecciated sulfide- rich quartz veins and tourmaline-quartz veins in type, and the genesis of gold mineralization of this area is belong to mesothermal vein type. Based on the analysis of IP anomaly of vein I and vein IV, apparent chargeability of anoma- ly range of is from 5% to 9% and apparent resistivity is from 50Ω· m to 300 Ω· m, which is considered the IPanomaly with low resistivity and high polarization in the surveyed area as the effective geophysical ore-hunting indi- cation.

关 键 词：道嘎金矿区 石英脉型 地质特征 地球物理 激发极化 内蒙古 

分 类 号：P618.51[天文地球—矿床学]