黑龙江小多宝山铜矿床成矿流体地球化学特征及演化
发布时间：2018-10-19 17:15
【摘要】：小多宝山铜矿床位于多宝山铜(钼)矿床北西约10 km处,是三矿沟-多宝山铜钼铁成矿带上一个较为典型的小型矽卡岩型铜铁矿床,矿体赋存于燕山期花岗闪长岩与中奥陶统多宝山组的接触部位。对早期硫化物阶段中石英和晚期硫化物阶段中方解石的流体包裹体岩相学及显微测温研究表明,早期硫化物阶段气液两相包裹体均一温度为238~467℃,盐度w(NaCl_(eqv))变化范围为8.8%~21.2%,含子晶三相包裹体均一温度为320~434℃、盐度为39.3%~50.1%;晚期硫化物阶段仅发育气液两相包裹体,均一温度为118~163℃,盐度为1.22%~5.99%。结果显示,早期成矿流体具有高温、高盐度、含CO_2的Na Cl-H_2O热液的特征,主成矿阶段北西向片理化活动,导致流体减压而强烈"沸腾",使得金属硫化物卸载沉淀。
[Abstract]:The Xiaobaoshan copper deposit is located about 10 km north west of the Dobaoshan copper (molybdenum) deposit. It is a typical small skarn type copper-iron ore deposit in the Sankuangou-Dobaoshan copper-molybdenum metallogenic belt. The orebody occurred in the contact part of Yanshanian granodiorite and middle Ordovician Dobaoshan formation. The petrography and microthermometry of fluid inclusions in quartz in early sulfide stage and calcite in late sulfide stage show that the homogenization temperature of gas-liquid two-phase inclusions in early sulfide stage is 238 ~ 467 鈩，
本文编号：2281801
[Abstract]:The Xiaobaoshan copper deposit is located about 10 km north west of the Dobaoshan copper (molybdenum) deposit. It is a typical small skarn type copper-iron ore deposit in the Sankuangou-Dobaoshan copper-molybdenum metallogenic belt. The orebody occurred in the contact part of Yanshanian granodiorite and middle Ordovician Dobaoshan formation. The petrography and microthermometry of fluid inclusions in quartz in early sulfide stage and calcite in late sulfide stage show that the homogenization temperature of gas-liquid two-phase inclusions in early sulfide stage is 238 ~ 467 鈩，
本文编号：2281801
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