热液型铀矿铀成矿与岩浆演化关系研究——以相山矿田、诸广地区铀成矿为例  

The Relation of Hydrothermal Uranium Metallization to Magma Evolution: A Case Study of Uranium Mineralization in Xiangshan and Zhuguang Ore Districts

作　　者：林锦荣[1] 胡志华[1] 王勇剑[1] 陶意 刘政国 LIN Jinrong;HU Zhihua;WANG Yongjian;TAO Yi;LIU Zhengguo(CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,Beijing 100029,China;CGNPC Uranium Resources Co.,Ltd.,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院中核集团铀资源勘查与评价技术重点实验室,北京100029 [2]中广核铀业发展有限公司,北京100029

出　　处：《铀矿地质》2022年第3期460-474,共15页Uranium Geology

基　　金：国家重点研发计划项目(编号:2017YFC0602600);国家自然科学基金面上项目(编号:41573051)联合资助。

摘　　要：文章通过相山矿田、诸广地区岩浆-热液演化特征与铀成矿演化特征研究,建立了相山矿田、诸广地区岩浆演化序列,厘定了相山矿田铀多金属、诸广地区铀成矿演化时序,建立了相山矿田铀多金属、诸广地区铀成矿热液演化序列;阐明了铀成矿相对主体岩浆活动具有相对“独立性”和“滞后性”。相山矿田、诸广地区经历长时间、多期次岩浆活动,岩浆活动以酸性岩浆活动为主体,后期发育小规模酸性、中基性岩浆活动,铀成矿在时间上晚于大规模主体岩浆活动(酸性岩浆活动),而与晚期小规模酸性、中基性岩浆活动时空关系密切,铀成矿相对主体岩浆活动具有时间“滞后性”。铀成矿流体作用不是岩浆分异热液演化的直接产物,铀成矿是相对独立的流体成矿事件,铀成矿具有相对“独立性”,由早期到晚期,铀成矿热液具有中高温向中低温、碱性向酸性、高氧逸度向低氧逸度演化的趋势。Based the studies on magmatic-hydrothermal evolution and uranium mineralization evolution of Xiangshan and Zhuguang area, the sequence of magmatic evolution and uranium mineralization evolution of Xiangshan uranium-polymetallic cluster and Zhuguang uranium cluster were established respectively, and the magmatic-hydrothermal evolution sequences were finally determined in Xiangshan and Zhuguang areas. The uranium mineralization is characterized by relative "independence" and "hysteresis" with respect to the magmatic activities. Xiangshan and Zhuguang areas have experienced long-term and multi-phase magmatic activities. The magmatic rocks are composed of acidic granitic or volcanic rocks, with some dyke intrusions.Uranium mineralization was formed much later than the large-scale acidic magmatic activities, but it is spatially and temporally related to late-stage acidic and intermediate-basic dykes. Thus, uranium metallogenic fluids were not directly derived from magmatic fractionation, but induced by a relatively independent metallogenic event. From the early stage to late stage, the uranium ore fluids were commonly characterized by the decreasing trends of temperature, alkalinity and oxygen fugacity.

关 键 词：岩浆演化序列 铀成矿热液演化序列 独立性 滞后性 相山矿田 诸广地区 

分 类 号：P619.14[天文地球—矿床学]