九瑞矿集区燕山期岩浆流体系统及空间分布特征探讨

Discussion on characteristics of Yanshanian magmatic fluid system and spatial distribution in Jiujiang-Ruichang ore concentration area,Jiangxi province

蚀变-流体地质填图是近年来用于了解流体系统和指导矿床勘查的重要方法。九瑞地区是中国重要的铜金铅锌矿集区。对九瑞矿集区开展系统的野外观测与综合研究,结果显示九瑞矿集区存在海西期喷流沉积流体系统、燕山期岩浆流体系统和燕山期中低温热流体系统。本文探讨了九瑞矿集区燕山期岩浆流体系统存在两个子系统:矽卡岩性流体子系统和斑岩型流体子系统;对燕山期岩浆流体系统的组成进行了归纳总结,指出燕山期岩浆流体系统的空间分布情况。蚀变-流体地质填图显示,九瑞矿集区岩浆-流体-成矿的强度自北东向南西呈梯级式递减,揭示东北部的NW向基底断裂对区内岩浆流体活动的主导性控制作用。

Alteration-fluid geological mapping is an investigation of the regional fluid geology,and also is a way to understand the hydrothermal fluid system and guide the mineral exploration.Jiujiang-Ruichang is a very important lead,zinc,copper,gold ore concentration area in China.It carried out field investigation and comprehensive study in Jiujiang-Ruichang.The study results showed that,there three fluid systems in Jiujiang-Ruichang,i.e.,Hercynian exhalative-sedimentary fluid system,Yanshanian magmatic fluid system and Yanshanian low temperature termal fluid system.There are two subsystems in Yanshanian magmatic fluid system,such as the skarn fluid subsystem and the porphyry fluid subsystem.The composition of the Yanshanian magmatic fluid system is summarized and pointed out that the Yanshanian magmatic fluid system spatial distribution.The results of the Alteration-fluid geological mapping show that,the strength of the magmaticfluid-mineralization in the Jiujiang-Ruichang ore-bearing area is decreasing from the north-east to the south-west,revealing the dominant control of the NW-base fault in the northeast to the magmatic fluid activity.