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

JIA Liqiong;XU Wenyi;YANG Dan;WANG Liang;Development and Research Center,China Geological Survey;National Geological Archives of China;China University of Geosciences (Beijing);Institute of Mineral Resources,Chinese Academy of Geological Sciences;Gold Geology Institute of Chinese Armed Police Force;  
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.
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