湘西合仁坪钠长石-石英脉型金矿床的成矿流体研究
发布时间：2018-10-23 17:39
【摘要】：合仁坪金矿床位于湘西柳林汊金矿带,是典型的钠长石-石英脉型金矿床,本文对其进行了较系统的成矿流体地球化学研究。结果表明,与成矿有关的石英和方解石中的流体包裹体主要为气液两相包裹体。石英中包裹体的均一温度范围为111~375℃,盐度为0.18%~7.86%的NaCl;方解石中包裹体的均一温度范围为196~271℃,盐度为4.18%~6.74%的NaCl;成矿溶液的密度为0.633~0.997g/cm~3,表明该矿床的成矿流体均属于中低温、低盐度和低密度的流体;成矿压力为4~209MPa,成矿深度约为1.2~6.8km,该矿床是在中低压力、中浅成条件下形成的。激光拉曼探针分析表明,包裹体中的气相成分有CO_2、CO、CH_4和N_2,液相成分为H_2O和CO_3~(2-),指示含有机质的沉积物变质脱水可能是成矿流体来源的方式。对石英和钠长石氢氧同位素研究表明,该矿成矿流体的δ~(18)O_(H_2O)值为7.1‰~10.8‰,δD_(H_2O)值介于-69‰~-55‰,合仁坪金矿的成矿流体主要来源于变质水。
[Abstract]:Herenping gold deposit is a typical albite quartz vein type gold deposit located in the Liulincha gold deposit zone in western Hunan Province. This paper makes a systematic study on the ore-forming fluid geochemistry of the deposit. The results show that the fluid inclusions in quartz and calcite related to mineralization are mainly gas-liquid two-phase inclusions. The homogenization temperature range of inclusions in quartz is 111 ~ 375 鈩，
本文编号：2289999
[Abstract]:Herenping gold deposit is a typical albite quartz vein type gold deposit located in the Liulincha gold deposit zone in western Hunan Province. This paper makes a systematic study on the ore-forming fluid geochemistry of the deposit. The results show that the fluid inclusions in quartz and calcite related to mineralization are mainly gas-liquid two-phase inclusions. The homogenization temperature range of inclusions in quartz is 111 ~ 375 鈩，
本文编号：2289999
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2289999.html
