江西某铀矿区古外生地下水径流问题讨论  

Palaeoexogenous groundwater runoff in a typical uranium orefield in Jiangxi Province

作　　者：王威 王兆忠 李万超 赵前 Wang Wei;Wang Zhaozhong;Li Wanchao;Zhao Qian(Shandong First Institute of Geology and Mineral Exploration,Jinan 250010,Shandong,China;Shandong Engineering Center for High-Grade Fe Ores Exploration and Exploitation,Jinan 250010,Shandong,China)

机构地区：[1]山东省第一地质矿产勘查院,山东济南250010 [2]富铁矿勘查开发技术山东省工程研究中心,山东济南250010

出　　处：《地质学刊》2024年第1期18-24,共7页Journal of Geology

基　　金：国家矿产资源储量技术标准体系建设项目子课题“矿区深部水文地质工程地质环境地质勘查技术与标准研究”(CB2019-4-1)。

摘　　要：在恢复江西某铀矿区成矿期古地形和区域地下水古流场的基础上,使用2个典型样品的气液包裹体实测压力数据反演包裹体中液体补给区地势,认为对流运动模式下的外生水不能进入成矿期的高压岩浆中;分析矿区内9个矿物流体包裹体H、O同位素测试结果,发现包裹体中的水部分来自大气降水。此外,10个岩浆包裹体及外生水参与的流体包裹体测温数据,以及区域矿床分布与古火山口的相对位置,也可证明矿液中的水部分来自古外生水,成矿过程中古外生水发生了“湍流”作用。After restoring the paleotopography and regional groundwater paleocurrent field of a uranium orefield in Jiangxi,the measured pressure data of gas-liquid inclusions of two typical samples were used to invert the topography of the liquid recharge zone in the inclusions,reaching the conclusion,namely,that the exogenous water in the convective mode could not enter the high-pressure magma in the metallogenic period.The results of hydrogen and oxygen isotope testing of 9 mineral fluid inclusions in the mining area show that water in the inclusions partly came from atmospheric precipitation.In addition,temperature measurement data of fluid inclusions involving 10 magmatic inclusions and exogenous water,as well as the relative position of the distribution of regional deposits and paleovolcanic craters,can also prove that part of the water in the ore fluid came from paleoexogenous water,and the paleoexogenous water underwent″turbulence″during the mineralization process.

关 键 词：铀矿 古水文地质分析 流体包裹体 H、O同位素 湍流 江西 

分 类 号：P619.14[天文地球—矿床学] P641.139[天文地球—地质学]