辽西蒋家屯和兰家沟钼矿的流体包裹体对比研究

通过对辽西蒋家屯和兰家沟钼矿的流体包裹体研究，两种不同类型的成矿流体被识别出来.蒋家屯脉状钼矿含矿石英脉中发现大量的Ⅰ型水溶液流体包裹体，成矿流体的均一温度为163~234℃，盐度为3.06%~ 6.01%(NaCl eqv，质量分数)，表明成矿流体为中低温度、低盐度流体.兰家沟斑岩型钼矿含矿石英脉中发育含CO₂Ⅱ型包裹体，包裹体内较高含量的CO₂指示了成矿深度较大.兰家沟钼矿的成矿流体均一温度为200~283℃(Ⅰ型包裹体)和281~346℃(Ⅱ型包裹体)，盐度为2.74%~7.31%(NaCl eqv，质量分数)(Ⅰ型包裹体)和3.52%~4.80%(NaCl eqv，质量分数)(Ⅱ型包裹体).鉴于上述研究，与大型兰家沟斑岩型钼矿相比，目前揭露的蒋家屯脉状钼矿体成矿深度较小，成矿温度较低，其深部可能会发现更具经济价值的斑岩型钼矿体.

Comparative Study on the Fluid Inclusion in Jiangjiatun and Lanjiagou Mo Deposits in the Liaoxi Area

Based on the fluid inclusion study on the Jiangjiatun and Lanjiagou Mo deposits， two distinctive ore-forming fluids were identified. Fluid inclusions in the Jiangjiatun Mo deposit are characterized by type Ⅰ two-phase aqueous inclusions， with homogenization temperatures from 163 to 234℃ and salinity values from 3.06% to 6.01%. It indicates that ore-forming fluids are moderate-low homogenization temperature and salinity. Fluid inclusions in the Lanjiagou Mo deposit are featured by type Ⅱ CO₂-bearing fluid inclusions， indicating a deep formation environment. Microthermometric data in the Lanjiagou Mo deposit show homogenization temperatures from 200 to 283℃ for type Ⅰ inclusions and from 281 to 346℃ for type Ⅱ inclusions， and salinities from 2.74% to 7.31% for type Ⅰ inclusions and from 3.52% to 4.80% for type Ⅱ inclusions. In view of the above research results， it is believed that the discovered ore bodies in the Jiangjiatun deposit were formed in a much shallower environment with lower homogenization temperature and salinity than the Lanjiagou Mo deposit. It indicates that it is possible to find Mo orebodies at depth beneath the exposed ore bodies.