黑龙江嘎拉山地区水系沉积物测量地球化学特征及找矿方向

嘎拉山地区位于大兴安岭山脉北东端与小兴安岭山脉北西端接壤处,处于黑龙江省重要的有色金属成矿区带内。在嘎拉山地区1∶5万水系沉积物测量基础上,通过对成矿元素分布特征、相关性等分析认为区内主要成矿元素为金,后期叠加富集特征明显,金异常规模较大,峰值高,浓集中心明显,元素套合好,找寻金矿床或矿化体潜力较大;通过后期查证及地表槽探工程揭露发现金矿(点)多处,均产于北宽河岩组地层内或与侵入岩接触部位,金矿化与硅化(石英脉)关系密切,显示了研究区内具有较好的找矿前景,同时根据水系沉积物异常特征及所处地质环境,为进一步找矿工作指明了方向。

Geochemical characteristics and prospecting direction of Galashan regions in Heilongjiang Province based on stream sediment survey

Galashan region ,lying in the northeast of Great Khingan Mountains and the northwest of Lesser Khin-gan Mountains ,is located in the important non-ferrous metallic mineral belt of Heilongjiang Province .Based on the 1∶50 000 stream sediment survey ,the paper made a preliminary analysis on geochemical features in Galashan region .The analysis,carried out about elements distribution characteristics and correlation ,etc.,indicates that the main ore-forming element is gold ,and the characteristic of superimposed enrichment is evident in late stage .The stream sediment survey showed that Au anomaly is of great scale ,and has high peak value ,obvious concentration centre and good registration . The deposit possesses great potentials in searching gold deposits and mineralization .The gold mineralization spots oc-curred in the Beikuanhe Formation or the boundary of intrusive rock according to surface engineering .The mineraliza-tion type is dominated by silicification （ quartz vein ） .It displayed great prospecting potentials , and according to the characteristics of stream sediment survey anomaly and geological environment ,provides guidance for further prospec-ting.