古水文地质方法在研究下庄花岗岩型铀矿床中的应用

Application of Paleohydrogeological Methods to the Study of the Xiazhuang Granite Type of Uranium Deposit

本文在分析华南下庄铀矿田区域地质背景、古气候条件的基础上，运用古水文地质方法对该区构造－古水文地质分期、分区进行了划分，确定了下庄铀成矿古水热系统的补给区、径流区和排泄区位置，并对该水热系统中铀成矿作用的水文地质过程作了简要的归纳。分析结果表明，下庄古水热系统补给区位于贵东花岗岩体的中西部，排泄区位于贵东岩体东部的下庄矿田，铀矿床形成于古水热系统排泄区（减压区）

Based on the regional geological setting and paleoclimatic conditions of the Xiazhuang uranium ore field in south China, this paper divides the stage and area of tectonic aleohydrogeology. The recharge, runoff and discharge areas for the Xiazhuang uranium ore formation palio hydrothermal system is clarified, and the hydrogeological process of the uranium mineralization of the system is simply induced by the means of the paleohydrogeological methods.The analytical resuits show that the recharge area of Xiazhuang palio hydrothermal system is located in the central and west part of Guidong granite massif, and the discharge area of the system is located in the Xiazhuang uranium ore field, east Guidong massif. Uranium deposit occurs in the discharge area (decompression area) of the paleo hydrothermal system