本文選題：白云金礦 + 流體包裹體�。� 參考：《礦物巖石》2017年01期

【摘要】：遼寧白云金礦是遼東-吉南裂谷帶內(nèi)典型的大型金礦床,其成礦作用復(fù)雜,為了深入揭示其成礦流體、成礦物質(zhì)來源及成礦模式特征,針對白云金礦石進行流體包裹體、H,O,S及與成礦有關(guān)的巖體的研究,結(jié)果顯示:5塊金礦石流體包裹體的均一溫度范圍為152℃~370℃,主要分布在240℃~310℃,激光拉曼成分主要為CO_2和CH_4,有少量H_2O,極少數(shù)有N_2;5塊金礦石δ~(34)S值為-8.5‰~+1.6‰(平均為-4.85‰),賦礦圍巖(黑云片巖、變粒巖)中δ~(34)S值為+10.0‰~+17.0‰(平均為+14.57‰),地層大理巖的δ~(34)S值為-0.5‰~+13.2‰(平均為+7.17‰);5塊金礦石石英中δ~(18)O為8.0‰~15.5‰,δD為-96.3‰~-73.6‰;與成礦有關(guān)的新嶺巖體SHRIMP U-Pb年齡為217.6Ma±2.2Ma。流體包裹體特征表明:成礦流體為中溫低鹽度低密度的水鹽流體,屬于含N_2的H_2O-CO_2-CH_4-NaCl體系。流體中CO_2及CH_4形成與大理巖有關(guān),極少數(shù)的N_2含量可能與大氣水有關(guān)。氫氧同位素結(jié)果顯示,成礦熱液主要來源于深部巖漿水,后期混有部分大氣降水。硫同位素特征表明,成礦物質(zhì)可能主要來自巖漿熱液。綜上,白云金礦床的主成礦期為印支期,白云金礦床屬于巖漿熱液型金礦。
[Abstract]:Baiyun gold deposit in Liaoning Province is a typical large gold deposit in the Liaodong-South Jilin rift zone, and its mineralization process is complex. In order to reveal the ore-forming fluid, the source of ore-forming material and the characteristics of metallogenic model, the ore-forming fluid, ore-forming source and metallogenic model are studied. The fluid inclusions of dolomitic gold ore and the ore-forming related rock masses are studied. The results show that the homogeneous temperature range of fluid inclusions is 152 鈩，

本文編號：1876189