黄金科学技术 ›› 2022, Vol. 30 ›› Issue (1): 34-45.doi: 10.11872/j.issn.1005-2518.2022.01.047
Wei WAN1(),Mingqi WANG2,Huihu FAN3,Libo ZUO4,Keke YANG2
摘要:
毕力赫金矿位于华北克拉通北缘,是一座大型低温热液—斑岩型金矿,产于花岗闪长斑岩和围岩火山碎屑岩内外接触带中。随着矿山开采工作的持续进行,该矿山资源量面临危机,加强探边摸底工作势在必行。为了寻找有效的地球化学找矿指标,采用无火焰原子吸收光谱法(AAN)、等离子质谱法(ICP-MS)和原子荧光光谱法(AFS)等多种分析方法,对毕力赫矿区Ⅱ号矿带3个钻孔原生晕元素特征进行了研究。结果表明:毕力赫金矿化的主要指示元素组合为Au、W、Mo、As、Sb和Hg;矿区内出现2组金矿成矿指示元素组合,分别是Au-W-Mo高温元素组合和Au-As-Sb-Hg低温元素组合。其中,Au-W-Mo元素组合指示高品位金矿化,可作为区内寻找高温斑岩型金矿的主要找矿指标;Au-As-Sb-Hg元素组合指示低品位金矿化,可作为区内寻找脉状低温热液型金矿的主要找矿指标。利用原生晕找矿方法进行深部成矿预测和评价,发现了微弱的金矿化活动信息,可为研究区金矿找矿工作提供更准确的地球化学找矿指标,具有重要的实际意义。
中图分类号:
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