开鲁盆地铀矿水文地球化学找矿研究

本文从基础地质条件出发 ,界定了开鲁盆地的发展历史 ,全面分析了研究区的水文地质条件、水文地球化学特征及地下水的含铀性 ,确定了在整体坳陷期形成的姚家组和四方台组区域承压含水层的找矿意义。同时 ,从水文地质构造层、渗入渗出体系的划分及浅层地下水和深部地下水化学异常显示等方面入手 ,较详细地阐述了开鲁盆地水文地质条件和水文地球化学特征及其对层间氧化带发育条件的影响 ,预测了两处可地浸砂岩型铀矿的成矿远景地段 ,并指出道德庙是本区最具找矿前景的地区。

RESEARCH ON HYDROGEOCHEMICAL PROSPECTIING FOR URANIUM IN KAILU BASIN

Based on the basic geology this paper determines the development history of Kailu basin, and comprehensively analyses hydrogeologic conditions and hydrogeochemical characteristics, as well as the uranium concentration in groundwater, determines the prospecting significance of regional confined aquifers in Yaojia and Sifangtai Formations formed during the subsidence stage of the basin. Moreover, by dividing the hydrogeological stractural layer, and infiltration and seepage systems, distinguishing hydrochemical anomalies of shallow groundwater and deep groundwater this paper expounds hydrogeological conditions and hydrogeochemical features of the Kailu basin and their effect to the development of the interlayer oxidation zone, predicts two prospective areas for in situ leachable sandstone type uranium deposits, and finally proposes the Daodemiao area as the most favourable metallogenic target for uranium ore formation.