【摘要】：合仁坪金礦床位于湘西柳林汊金礦帶,是典型的鈉長石-石英脈型金礦床,本文對其進行了較系統(tǒng)的成礦流體地球化學(xué)研究。結(jié)果表明,與成礦有關(guān)的石英和方解石中的流體包裹體主要為氣液兩相包裹體。石英中包裹體的均一溫度范圍為111~375℃,鹽度為0.18%~7.86%的NaCl;方解石中包裹體的均一溫度范圍為196~271℃,鹽度為4.18%~6.74%的NaCl;成礦溶液的密度為0.633~0.997g/cm~3,表明該礦床的成礦流體均屬于中低溫、低鹽度和低密度的流體;成礦壓力為4~209MPa,成礦深度約為1.2~6.8km,該礦床是在中低壓力、中淺成條件下形成的。激光拉曼探針分析表明,包裹體中的氣相成分有CO_2、CO、CH_4和N_2,液相成分為H_2O和CO_3~(2-),指示含有機質(zhì)的沉積物變質(zhì)脫水可能是成礦流體來源的方式。對石英和鈉長石氫氧同位素研究表明,該礦成礦流體的δ~(18)O_(H_2O)值為7.1‰~10.8‰,δD_(H_2O)值介于-69‰~-55‰,合仁坪金礦的成礦流體主要來源于變質(zhì)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，

本文編號：2289999