CAJ | 학술논문

新安子钨锡矿床主矿脉中流体包裹体显微测温学研究表明石英中流体包裹体的均一温度集中在320～360℃、260～300℃和180～230℃3个区间，代表成矿的3个阶段，黑钨矿主要形成于高温阶段，硫化物则主要形成于中温阶段；岩浆热液和大气降水热液的混合及其伴生的沸腾作用发生于成矿的晚期阶段（180～230℃），因此它们可能不是W、Sn和硫化物成矿的主要机制。激光拉曼光谱分析表明石英和黄玉中的流体包裹体气相成分以H2O为主，含少量CH4和CO2，并呈现出随均一温度的降低，CO2的含量降低，CH4含量升高的变化趋势；这一变化趋势表明流体由氧化性逐渐向还原性转变，这可能是造成硫化物成矿的主要机制。
신안자오석광상주광맥중류체포과체현미측온학연구표명석영중류체포과체적균일온도집중재320～360℃、260～300℃화180～230℃3개구간，대표성광적3개계단，흑오광주요형성우고온계단，류화물칙주요형성우중온계단；암장열액화대기강수열액적혼합급기반생적비등작용발생우성광적만기계단（180～230℃），인차타문가능불시W、Sn화류화물성광적주요궤제。격광랍만광보분석표명석영화황옥중적류체포과체기상성분이H2O위주，함소량CH4화CO2，병정현출수균일온도적강저，CO2적함량강저，CH4함량승고적변화추세；저일변화추세표명류체유양화성축점향환원성전변，저가능시조성류화물성광적주요궤제。
Fluid inclusions sampled from mother lodes of Xin’anzi quartz type W-Sn deposit were examined by petrography, microthermometry and Raman microprobe. The results show that:①the homogeneous temperatures of fluid inclusions in the quartz distribute intensively in three intervals, i.e. 320 ℃~360℃, 260 ℃~300 ℃ and 180 ℃~230 ℃, which might correspond to the three stages of the whole ore-forming process. Wolframite is formed mainly in the high-temperature stage while sulfides in the medium-temperature stage; ② The process that mixing of magmatic water with meteoric water and its companion boiling are probably not the key mechanism of W-Sn and sulfides mineralization because they have occurred in the late stage of mineralization (180 ℃~230 ℃); ③The gaseous phase of the fluid inclusions both in quartz and in topaz are composed of H 2O and a small amount of CO2 and CH4. With the decrease of the homogeneous temperatures, the content of CO 2 tends to degrade while that of CH4 is the opposite. It indicates that the fluid transformed gradually from an oxidizing solution to a reducing one, which might be the main mechanism which lead to the sulfide mineralization.