摘要
永丰县南坑萤石矿是江西省近年发现的大型矿床之一,属雨水成因的低温热液矿床。矿体呈长透镜状或大脉状产于燕山早期花岗岩体的断裂破碎带中,围岩蚀变以硅化和绢云母化为主。矿石结构构造类型复杂,但成分简单。通过对萤石中气液包体的形成温度、压力、盐度、pH值、包体成分和氢氧同位素的研究,表明萤石成矿平均温度为160℃,压力125bar,成矿热液富含Ca^(2+)、F^-和HCO_3^-,主要来源于雨水的循环系统。
Nankeng fluorite deposit in Yongfeng county is one of the largest deposits which were found recently in Jiangxi province, it belongs to epithermal deposit of meteoric water genesis The ore bodies all occurred in fault fractured zones of early Yanshan stage granite in long lentoid or large vein Silicification and sericitization occupy the first place in the wallrock alteration, All types of structures of the ore are complex, but the constitution is very simple It is showed that the average mineralization temperature of fluorite is 160℃, pressure is 125 bar, mineralizing fluid is rich in Ca^(2+), F^- and HCO_3^- which mainly originated from the circulating system of meteoric water through the studying of the forming temperature, pressure, salty, pH value, composition of inclusions and hydrogen & oxygen isotope of fluid inclusions in fluorite.
