Geological structure of the Shengyuan volcanic basin in Jiangxi Province and its controlling for uranium mineralization
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摘要: 江西盛源火山盆地铀矿地质找矿工作以往更多关注早白垩世打鼓顶组和鹅湖岭组的含矿性以及早寒武世外管坑组矿源层等问题, 忽视了构造对铀成矿的控制作用.文章在收集和整理前人研究成果的基础上, 结合近些年来该区铀矿地质调查工作取得的最新成果, 探讨构造对该区铀成矿的控制作用, 并总结铀成矿规律.不同时期、级别、性质和序次的断裂组成控矿构造系统;萍乡—广丰深断裂带控制武功山—铅山铀成矿带呈近EW向展布, 较大规模的"构造结"决定铀矿田的产出位置, 低级别的EW向、NE向和NW向断裂控制铀矿体的定位.Abstract: Previous geological prospecting for uranium deposits in Shengyuan volcanic basin of Jiangxi focused mainly on ore-bearing potential of the Early Cretaceous Daguding Formation and Ehuling Formation, as well as orebearing strata of Early Cambrian Waiguankeng Formation. But controlling of the structures over uranium mineralization has long been ignored. Based on collection and compilation for the published data, along with the latest research results in this region, controlling effect of the structures on the uranium mineralization was studied in details and mineralization regularity was also summarized. The results show that various-level and-order fault structures formed in different periods constitute an ore-controlling structural system. The Pingxiang-Guangfeng deep fault determines the east to west distribution of the Wugongshan-Yanshan uranium metallogenic belt. And relatively large structural joints determine the occurrence positions of uranium ore deposits, with the low-level EW-trending, NEtrending and NW-trending geological structures controlling the positions of uranium ore bodies. The conclusions will help further understanding the regularity of uranium mineralization in the area and provide reference and thinking for uranium prospecting in the future.
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