粤西阳春盆地旗鼓岭铜多金属矿流体包裹体研究

Study on fluid inclusions of Qiguling copper polymetallic ore in Yangchun basin of western Guangdong province

摘要:

旗鼓岭铜多金属矿区是广东省有色金属地质局近年来发现的具有重要找矿前景的矽卡岩型铜钼钨矿区.在对该矿区岩石样品进行镜下薄片和光片鉴定的基础上,对其流体包裹体进行了较为系统的研究,结果表明:成矿前期矽卡岩阶段流体包裹体的均一温度变化范围为302~401 ℃,盐度变化范围为3.87，~13.72， NaCleqv;成矿早期石英-氧化物阶段流体包裹体的均一温度变化范围为154~396 ℃,盐度分布范围为3.71 ，~7.71 ， NaCleqv;主成矿期石英-硫化物阶段的流体包裹体均一温度变化范围为155~301 ℃,盐度变化范围为1.24，~6.16， NaCleqv;成矿晚期碳酸盐阶段的流体包裹体均一温度变化范围为117~269 ℃,盐度变化范围为0.88，~8.28， NaCleqv.主成矿阶段包裹体类型多种多样,L型、V型、C型都发育,沸腾作用是该矿区金属矿物的主要沉淀机制.

Abstract:

The Qiguling copper polymetallic ore has important prospects for prospecting of skarn Cu-Mo-W is found in recent years by Non-ferrous Metal Geological Bureau of Guangdong Province.In this paper,a detailed examination of the rock specimen in the mine area is carried out under the microscope.The fluid inclusions were systematically studied.The results show that the homogenization temperature of the fluid inclusions in the early stage of the metallogenic stage is in the range of 302-401 ℃ and the salinities are in the range of 3.87，-13.72， NaCleqv.The average temperature range of fluid inclusions in quartz-oxide stage during the early mineralization ranged from 154 ℃ to 396 ℃,and the salinity ranged from 3.71 ， to 7.71 ， NaCleqv.During the main mineralization,the fluid inclusions in the quartz-sulfide phase homogenized.The range of variation is from 155 ℃ to 301 ℃,and the range of salinity is from 1.24， to 6.16， NaCleqv.The homogenization temperature range of fluid inclusions in the late stage of carbonate mineralization ranges from 117 ℃ to 269 ℃,and the salinity ranges from 0.88， to 8.28， NaCleqv. During the main mineralization,the types of inclusions are diverse.L type,V type and C type are all developed.Boiling is the main precipitation mechanism of metal minerals in this ore district.