相山铀矿田为我国最大的火山岩型铀矿床,近年在相山铀矿田深部发现有大量的铅锌矿脉,通过对铅锌矿脉石矿物的流体包裹体显微测温分析表明:相山深部铅锌矿方解石均一温度主要在110~412 ℃之间,流体盐度变化范围大,在0.53wt%~17.99wt% NaCleqv之间.包裹体中液相阳离子以Ca2+、Mg2+、K+为主,Na+次之,阴离子以Cl-、SO2-4为主,F-次之,流体以富集Ca2+、SO2-4为特征,流体包裹体的气相成份以H2O、CO2、N2及O2含量高并缺少CO为特征,其含量显著高于矿田内的铀矿床.铀矿床水云母δDV-SMOW值≈-72‰~-28‰,δ18OV-SMOW值≈7.3‰~15.2‰,铅锌矿绢云母δDV-SMOW值≈-99.1‰~-80.8‰,δ18OV-SMOW值≈12.1‰~15‰.铅锌矿的成矿流体主要来自于岩浆水.相山矿田铀矿床和铅锌矿同属一个成矿系统,从早期到晚期成矿阶段表现为一个降温的过程,早期沉淀中高温铅锌矿,晚期形成中低温铀矿.%Xiangshan ore field located in the eastern section of the famous Ganhang volcanic type uranium deposit belt, is the largest volcanic type uranium deposits in China.The formers have done more work on the uranium deposits in the region, but there are still some disputes.Especially, at present the lead-zinc mine is discovered in the deep, the metallogenesis will be more complex.The micro-temperature measurement analysis of the fluid inclusion indicates that The peak of the homogenization temperatures of the calcites in Niutoushan lead-zinc deposit are mainly between 110~412 ℃,the variation range of fluid salinity of Niutoushan lead-zinc deposit are from 0.53wt%~17.99wt% NaCleqv.Laser Raman probe for a single fluid inclusion and component testing for the group fluid inclusions show that Ca2+, Mg2+and K+ are the main liquid phase cationic in fluid inclusions of the calcites in lead-zinc ore deposit, and Na+secondly.Cl-and SO2-4are the main liquid phase anion, and F-secondly, Ca2+and SO2-4 is rich in the fluids.The characteristics of gas phase composition of fluid inclusion is high content of H2O, CO2,N2 and O2 and lack of CO.Its content is significantly higher than that of uranium ore deposits.Combined with the data of H-Oisotope, uranium and lead-zinc in Xiangshan ore field belong to the same polymetallic metallogenic system.High temperature lead-zinc deposit was formed early, and low temperature uranium deposit was formed late.Correspondingly, the mineralization characteristics within the ore field gradually changed from "lead-zinc" to "uranium".However, whether it is lead-zinc mineralization or uranium mineralization, in essence, it is related to the volcanic magma.
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