内蒙古陈巴尔虎旗莫勒格尔河地区钼成矿潜力分析

Molybdenum metallogenic potential analysis of Moleger River area in Chen Barag Banner,Inner Mongolia

内蒙古自治区呼伦贝尔市陈巴尔虎旗莫勒格尔河地区位于德尔布干断裂带东侧,区内北东和北西向构造发育,为矿床形成提供容矿空间及导矿通道。笔者通过野外地质调查,结合元素综合异常特征、激电异常特征、地表槽探工程,在该地区圈定Mo矿体4条,Mo矿化体9条。其中,工业矿体2条(Ⅰ号和Ⅱ号)、低品位矿体2条(Ⅲ号和Ⅳ号),赋矿岩性为满克头鄂博组蚀变流纹质晶屑凝灰岩。借助Mo元素异常特征将莫勒格尔河地区划分为4个成矿潜力区,其中1、2、3号区寻找热液型矿产,4号区寻找斑岩型钼及多金属矿产,1号和2号区成矿潜力巨大,3号和4号成矿潜力区有望成矿,并对4个成矿潜力区下一步找矿指明方向。

The Moleger River area in Chen Barag Banner,Hulunbeier City,Inner Mongolia is located on the east side of the De erbugan fault zone,in which the well developed northeast and northwest trending structures provide ore-bearing space and ore-conducting channels.Based on field geological survey,combined with composite geochemical anomalies,IP anomalies and surface trenching engineering,the authors delineated 4 molybdenum ore bodies and 9 molybdenum mineralization bodies in the working area,including 2 industrial ore bodies(ⅠandⅡ)and 2 low-grade ore bodies(ⅢandⅣ).The ore-bearing lithology is altered rhyolitic crystal tuff of Manketouebo Formation.According to the Mo anomaly characteristics,the Moleger River area is divided into four metallogenic potential areas,among them the No.1,No.2 and No.3 areas are expected for hydrothermal minerals,while the No.4 area is looking for porphyry molybdenum and polymetallic minerals.The No.1 and No.2 areas have great metallogenic potential,and the No.3 and No.4 areas are expected to be mineralized.Meanwhile,the future prospecting direction of the four metallogenic potential areas is pointed out.