一种方解石化学成分标型方法及其在胶东金银矿中的应用

摘要

The largest gold district in China is the Jiaodong Peninsula. This study is based on chemical com-position characteristics of calcite from gold deposits in Jiaodong. In this paper,a new formula is proposed to study the chemical composition characteristics of calcite in gold and silver deposits. The results show that the chemical composition characteristics of calcite between gold and silver deposits are of great difference. The spots of gold de-posits are located in the area of riched CO2 areas. But the spots of silver deposits located in the area of riched CaO areas. The reason of these differences is mainly resulted from each different ore-forming condition.%方解石是金矿中广泛发育的矿物之一，和金矿化关系密切。通过提出一种方解石化学成分标型参数δCaO-δCO2，成功应用于胶东金银矿中。对胶东各金矿和十里铺银矿中成矿期方解石的化学成分特征进行详细研究，结果表明：胶东岩浆热液型金矿及银矿中方解石的化学成分特征存在显著分区特征，金矿方解石的投点位于富CO2区域内，但银矿方解石的投点位于富CaO区域内，以上金、银矿方解石的化学成分差异源于它们成矿环境的差异。