大兴安岭北段碧洲地区成矿条件及远景分析

Metallogenic conditions and prospect analysis in Bizhou area,northern Greater Khingan Mountains

碧洲地区位于大兴安岭北段东坡,林海—大乌苏Cu-Pb-Zn-Au-Ag成矿带上,成矿地质条件优越。在综合分析区域成矿地质背景基础上,总结了研究区地层、岩浆岩、构造和地球化学等成矿条件。根据区内典型金及多金属矿床(点)特征,结合野外地质调查情况,归纳了找矿标志。依据1∶5万区域地质矿产调查成果,对研究区地质条件、化探异常、遥感解译等信息进行综合分析,在研究区内圈定了乌鲁喀马河下游和阿横内河上游Ⅱ级成矿远景区2处,且新发现2处多金属矿化点,为该区下步找矿工作指明了方向。

Bizhou area is located in the eastern slope of the northern section of Greater Khingan Mountains and the Linhai-Dawusu Cu-Pb-Zn-Au-Ag metallogenic belt,and it has superior ore-forming geological conditions.Based on comprehensive analysis on regional metallogenic geological settings and metallogenic rules,this paper summarized the metallogenic conditions such as the stratum,magmatic rock,tectonics,and geochemistry in the study area.According to the characteristics of typical gold and polymetallic deposits and outdoor field investigation,the prospecting indicators are summarized in this paper. Based on the 1∶ 50 000 regional geology and mineral resources survey,geological conditions,geochemical anomaly and remote sensing interpretations in the study area are comprehensively analyzed. 2 secondary metallogenic prospects areas are delineated,namely the downstream Wulukama River and the upstream Ahengnei River. 2 spots of polymetallic mineralization are discovered. The study points out the direction of prospecting in the region.