北山内蒙新发现的黑山咀南金多金属矿带地质特征及找矿潜力  

Geological Characteristics and Prospecting Potential of Newly Discovered Gold-Polymetallic Ore Belts in South Heishanju,Beishan,Inner Mongolia

作　　者：张善明[1,2] 贺中银 韩志敏 王永晖 胡二红 周彦波 Zhang Shan-ming;He Zhong-yin;Han Zhi-min;Wang Yong-hui;Hu Er-hong;Zhou Yan-bo(China University of Geosciences(Beijing),Beijing 100083;The Eighth Branch,Inner Mongolia Bureau of Geology and Mineral Resources Exploration and Development,Wuhai,Inner Mongolia 016000)

机构地区：[1]中国地质大学(北京),北京100083 [2]内蒙古自治区第八地质矿产勘查开发院,内蒙古乌海016000

出　　处：《地质与勘探》2018年第5期890-901,共12页Geology and Exploration

基　　金：内蒙古自治区国土资源厅项目<内蒙古自治区额济纳旗呼鲁古其古特等四幅1:5万区域矿产地质调查>(编号:NMKD2014-10)资助

摘　　要：多年来,北山内蒙地区金矿勘查进展不大。2014年,在北山内蒙黑山咀南发现了金多金属矿带,其位于古生代火山盆地过渡带。探槽控制了三条矿带,Ⅰ号矿带长约1500m,宽0. 8～5m,刻槽样显示石英脉Au品位在1. 00～45. 30g/t间,Pb品位在1. 00%～26. 86%间,蚀变岩Au品位在1. 00～39. 90g/t间,伴生Ag品位在60～528g/t间,局部地段Cu品位在0. 50%～13. 70%间。Ⅱ号矿带长约3800m,宽0. 3～10m,刻槽样显示北东向石英脉Au品位在1. 00～95. 80g/t间,近东西向石英脉Au品位在1. 00～4. 20g/t间,蚀变岩Au品位在1. 00～16. 60g/t间,局部地段Cu品位在0. 50%～1. 30%间。Ⅲ号矿带长约1300m,宽1. 2～6m,刻槽样显示石英脉Au品位在1. 00～23. 20g/t间,蚀变岩Au品位在1. 00～13. 90g/t间。块状方铅矿脉Pb品位在1. 00%～78. 73%间,伴生Au、Ag、Cu品位分别在1. 00～20. 20g/t、60～1088g/t、0. 50%～21. 54%间。拣块样显示Au、Ag、Pb品位最高达1223. 00g/t、1760g/t、81. 38%。系统的地表工作表明,该区找矿潜力巨大,该矿带的发现对北山内蒙地区的区域找矿具有重要启示意义。For years,no great gold prospecting progress has been made in the Beishan area,Inner Mongolia.Gold mineralized belts have been found in south Heishanju,Beishan,Inner Mongolia in 2014.The gold mineralized belts are distributed along the transitional zone of Paleozoic volcanic basin.Three gold mineralized belts have been exposed by many trenches.Among these,the No.I belt is 1500 m long and 0.8~5 m wide,and trench samples indicate that the Au grades of quartz veins are 1.00~45.30g/t,Pb grades of 1.00%~26.86%,while the Au grades of alterated rocks are 1.00~39.90g/t,accompanying Ag grades of 60~528g/t,and the Cu grades at local districts of 0.50%~13.70%.The No.II belt is 3800 m long and 0.8~10 m wide,and trench samples indicate that the Au grades of NE strike quartz veins are 1.00~95.80g/t,E-W strike quartz veins are 1.00~4.20g/t,the Au grades of alterated rocks are 1.00~16.60g/t,and the Cu grades at local districts are 0.50%~1.30%.The No.III belt is 1300 m long and 1.2~6.0 m wide,and trench samples indicate that the Au grades of quartz veins are 1.00~23.20g/t,the Au grades of alterated rocks are 1.00~13.90g/t,the Pb grades of massive galena are 1.00%~78.73%,and accompanying Au,Ag and Cu grades are 1.00~20.20g/t,60~1088g/t and 0.50%~21.54%,respectively.The picking out samples indicate that the maximum grade of Au,Ag and Pb is 1223.00g/t,1760g/t and 81.38%,respectively.The systemic surface prospecting work indicates that the prospecting potential is large in this area,and the discovery of these three gold mineralized belts provided us very good exploration significance in other areas in Beishan,Inner Mongolia.

关 键 词：金矿带 地质特征 找矿潜力 黑山咀 内蒙地区 北山 

分 类 号：P613[天文地球—矿床学]