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
投稿时间:2017-12-13  修订日期:2018-06-13  点此下载全文
引用本文:张善明.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[J].地质与勘探,2018,54(5):890-901
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张善明 中国地质大学(北京)北京 内蒙古自治区第八地质矿产勘查开发院内蒙古乌海 309272603@qq.com 
基金项目: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
中文摘要: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。
中文关键词:金矿带 地质特征 找矿潜力 黑山咀 内蒙地区 北山
 
Geological characteristics and prospecting potential of newly discovered gold-polymetallic mineralized belts in south Heishanju,Beishan,Inner Mongolia
Abstract:For years,no great progress have been made in the gold prospecting in Beishan area,Inner Mongolia. In 2014 gold mineralized belts have been found in south Heishan of this region, which are distributed along the transitional zone of a Paleozoic volcanic basin. Three gold mineralized belts have been exposed by many trenches,of which the No.1 belt is 1500 meters long and 0.8-5 meters wide. Trench samples indicate that the Au grades of quartz veins from this belt are between 1.00~45.30g/t,Pb grades are between 1.00%~26.86%,while the Au grades of alterated rocks are between 1.00~39.90g/t,accompanying Ag grades are between 60~528g/t,and the Cu grades at local sites are between 0.50%~13.70%. The No.2 belt is 3800 meters long and 0.8~10 meters wide,where trench samples indicate the Au grades of NE strike quartz veins between 1.00~95.80g/t,E-W strike quartz veins 1.00~4.20g/t,Au grades of alterated rocks 1.00~16.60g/t,and Cu grades at local places 0.50%~1.30%. The No.3 belt is 1300 meters long and 1.2~6.0 meters wide,in which trench samples indicate the Au grades of quartz veins 1.00~23.20g/t,Au grades of alterated rocks 1.00~13.90g/t,Pb grades of massive galena 1.00%~78.73%,and accompanying Au, Ag and Cu grades 1.00~20.20g/t, 60~1088g/t and 0.50%~21.54%, respectively. The samples picked out demonstrate the maximum grades of Au, Ag and Pb 1223.00g/t, 1760g/t, 81.38%, respectively. The systemic surface prospecting work indicates a great prospecting potential in this area,and the discovery of these three gold mineralized belts would cast a new light on ore-search in other areas of Beishan,Inner Mongolia.
keywords:gold mineralized belt,geological characteristics,prospecting potential,Heishanju,Beishan
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