大功率激电法和连续电导率测深在赤峰-朝阳金矿化集中区快速找矿评价中的应用  

Application of High-power Induced Polarization and Continuous Conductivity Sounding for Prospecting in the Chifeng-Chaoyang Gold Concentration Region

作　　者：陈伟军[1] 洪万华[2] 郝情情 褚少雄[3] 邢宝山[3] 

机构地区：[1]中国冶金地质总局矿产资源研究院,北京101300 [2]贵州省地矿局103地质大队,贵州铜仁554300 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《地质与勘探》2016年第1期152-158,共7页Geology and Exploration

摘　　要：研究区位于华北地台北缘赤峰-朝阳金矿化集中区,成矿地质条件优越。自上世纪四十年代在该区发现矿化露头以来,一直没有找到主矿体。为了解决该区的找矿问题,在充分研究工作区的地质、地球物理特征前提下,采用了大功率激发极化中梯装置扫面和EH4连续电导率测深相结合的方法进行勘查,达到了良好的找矿效果。激电中梯扫面结果表明,矿致异常表现为中高电阻率、中高充电率异常,异常连续性好,呈近南北向展布,延长超过850m,未封闭;EH4连续电导率测量结果表明,异常向深部连续、清晰,异常产状近于直立,宽度约100m,延深超过600m。上述异常均与已知矿体具有良好的对应性,显示了矿区具有良好的深部找矿潜力。The studywork area is located in the Chifeng-Chaoyang gold mineralization concentration region on the northern margin of North China block, which has good mineralize condition.Since ihe discovery of day when mineralization outcrops be found in 1940s, no major ore bodies have been found yetthere is less production.To solve this problem,we attempted to conduct a geophysical survey in this area.In light of According to the geologic and geo-physical characteristics olin the study area,we chose the appropriate methods and technique which including high-power intermediate gradient 1P and con-tinuous conduetiriy sounding the Stratagem EH4 system）, obtaining a relatively ideal result for mine prospecting.The resuhs of the intermediate gradient IP measure indicates anomaliesy which caused by mineralization bodiesy featured byputs up mid-high apparent resistiviityance rate and mid-high anomalies ofapparent charging rates. And these anomaliesy extends downward to a depth of more than 850m,nearly along the NShmgitude direction, with good eontinu-ityous and nut closed down.The results of the Stratagem EH4 system also show the. anomaliesy eonlinue to extends sharply to the deep subsurface witha a width of about lOOm,and nearly vertically for more 600m,consecutively and elearly.These anomalesey has good correspond welling with known foregone ore bodiesspot,suggestingand reveals that there is a good metallogenic prospect atin the depth in this area.

关 键 词：大功率激电 EH4连续电导率 赤峰-朝阳金矿化集中区 

分 类 号：P618[天文地球—矿床学]