秘鲁阿雷基帕省阿蒂科铁氧化物铜金矿床成矿流体特征及来源

摘要

秘鲁阿蒂科矿床是一个铁氧化物铜金矿床.含矿石英脉的流体包裹体均一温度为107～389℃,盐度为2.2％～23.18％Na?Cl.均一温度数据呈近似正态分布,但是,盐度数据总体不呈正态分布,且盐度较低,主要集中于0～10％NaCl和20％～30％Na?Cl之间.矿床δDV-SMOW和δ18OH2O的组成投影点靠近雨水线,反映该矿床成矿流体为大气降水来源.%The Atico deposit is an IOCG deposit. Homogenization temperature of fluid inclusions in quartz varies from 107℃ to 389℃. The salinity range is 2.2％～23.18％NaCl. The homogenization temperatures are approximately in normal distribution, where?as the salinities are not in normal distribution and low, being mainly concentrated on 0～10％NaCl and 20％～30％NaCl. The fact that subpionts of δDV-SMOW andδ18OH2O of samples in the deposit suggests that the ore-forming fluids were mainly derived from atmo?spheric precipitation.