海南抱伦金矿床流体演化与成矿作用  

Evolution of fluid inclusions in the Baolun gold deposit, Hainan and it's metallogenesis

作　　者：王婧[1,2] 周汉文[2] 钟增球[2] 张小文[2] 向华[2] 

机构地区：[1]中国地质科学院矿产综合利用研究所,四川成都610041 [2]中国地质大学(武汉)地球科学学院,湖北武汉430074

出　　处：《中国矿业》2013年第1期76-82,共7页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:49702020);国土资源部公益性行业科研专项项目资助(编号:200811015)

摘　　要：抱伦金矿床流体活动有多期多阶段的特点。本文通过流体包裹体显微测温分析表明,不同阶段形成的石英脉中的流体包裹体的均一温度和盐度均有不同。第Ⅰ阶形成金-粗粒石英脉;第Ⅱ阶段形成金-细粒石英脉;第Ⅲ阶段形成金-多金属硫化物石英脉。成矿流体温度逐渐升高,盐度逐渐下降。结合激光拉曼探针分析及前人所做的氧同位素测试分析结果,笔者认为抱伦金矿成矿流体是由岩浆活动产生的岩浆热液和大气降水混合形成的中高温不混溶热液。成矿热液在裂隙中上升,减压造成流体的沸腾和大气降水的加入,引起流体的物理、化学性质改变,是金沉淀的原因。The fluid activities of the Baolun gold deposit were characterized by several phases. In this study, the compositions, salinities and homogenization temperatures of the fluid inclusions in the quartz veins formed in each phases are different, based on microscopic temperature measurements of fluid inclusions. In the gold-bearing coarse-grained quartz veins formed during Phase I;in the gold-bearing fine-grained quartz veins formed duing Phase II; in the gold-bearing multi-metal sulfide quartz veins formed in Phase IlL Generally,the temperatures of the fluid gradually increased,and the salinities decreased. Combined with the laser Laman analyses and previous O isotopic studies of other researchers, we consider that the ore-forming fluids were high temperature immiscible hydrotherm of magmatic hydrotherm produced by the Jianfengling Magmatism and meteoric water. The ore-forming hydrothem went up along the fissures, resulting in ebullition as the pressure released, and continuously mixed with the meteoric water, which changed physical and chemical properties of the fluid. This finally conduced to the precipitation of gold.

关 键 词：流体包裹体 成矿流体 成矿作用 热液型金矿 海南抱伦 

分 类 号：P618.51[天文地球—矿床学]