杨山萤石矿微量元素地球化学特征及找矿潜力

杨山萤石矿为河南省规模最大的萤石矿床,属严格受断裂构造控制的热液脉状萤石矿床。矿石及围岩微量元素显示Ni元素矿石中相对富集,可作为判定萤石矿异常区的指示元素；微量元素标准化蛛网图分析发现,矿床成矿作用具有多期次性,成矿过程中流体与围岩发生不同程度的水岩反应；通过Sr/Ba、Rb/Sr、Nb/Ta、Zr/Hf比值分析发现,成矿流体可能主要为海水相流体,后期有少量大气降水的加入,成矿过程中无大规模的渗入性流体流动。指出了矿床F3断裂以及其它北西向断裂仍具很大的找矿潜力。

Trace elements geochemistry and prospecting potential ofYangshan fluorite mine

Yangshan fluorite mine is the largest fluorite deposit in Henan Province,and belongs to hydrothermal vein-like fluorite deposit strictly controlled by fault structure.The trace elements of the ore and surrounding rocks show that Ni is relatively enriched in the ore,which can be used as an indicator element for determining the anomalous area of the fluorite ore.The standardized spider web analysis of trace elements found that the mineralization of the deposit has multiple phases.During the mineralization process,the fluid and surrounding rocks undergo different degrees of water-rock reactions;analysis of the ratios of Sr/Ba,Rb/Sr,Nb/Ta,andZr/Hf shows that the ore-forming fluids may be mainly seawater-phase fluids,with a small amount of atmospheric precipitation added in the later stage.There is no large-scale infiltrating fluid flow during the mineralization process.It is pointed out that the F3 fault of the deposit and other northwestward faults still have great prospecting potential.