江西相山铀矿田邹家山铀矿床蚀变特征及热液来源

对江西相山铀矿田邹家山矿床不同标高的赋矿围岩及矿石样品进行了主量元素、微量元素和稀土元素地球化学分析。结果表明,邹家山矿床不同中段的矿石经历了碱性—酸性—碱性的蚀变过程,在-85 m中段酸性蚀变达到最强,随深度增加碱性蚀变呈增强的趋势;微量元素的Q型聚类分析、不同中段U含量分析和稀土元素的配分模式表明,成矿物质可能并不来源于赋矿围岩,而是来源于流纹英安岩岩浆。进一步根据与成矿关系密切的13种元素的R型聚类分析,将邹家山矿床成矿热液系统划分为高温成矿热液系统和中低温成矿热液系统。

Characteristics of Mineralizing Alteration and Hydrothermal Sources in Zoujiashan Uranium Deposits in Xiangshan Uranium Ore Field in Jiangxi Province

In the paper,we analyses the geochemical elements including major elements,trace elements and rare earth elements of ore samples and ore-wall rock samples with different depths in the Zoujiashan mineral deposit of Xiangshan uranium ore field.Two conclusions have been reached as follows.The ore samples of the different depth in the Zoujiashan mineral deposit experience the alteration process of alkaline-acidic-alkaline,and the acidic alteration achieve to the strongest degree in the depth(-85 m);the alkaline alteration is enhanced with the increase of depth.Contents of trace elements,rare earth elements and U show that the metallogenic materials should not be from the ore-wall rock,but from rhyolite dacite magma.Further analysis based on the R cluster close to the mineralization of 13 elements,the ore-forming hydrothermal systems of the Zoujiashan deposit are divided into high temperature hydrothermal fluids and middle-low temperature hydrothermal fluids.