铀矿地质2025，Vol.41Issue(5)：822-835,14.DOI:10.3969/j.issn.1000-0658.2025.41.057
海拉尔盆地贝尔-乌尔逊凹陷古水文地质特征与铀成矿关系
Relationship Between Paleo-hydrogeological Characteristics and Uranium Mineralization in Beier-Wuerxun Depression,Hailaer Basin
摘要
Abstract
In order to find out the internal relationship between the regional paleohydrogeological characteristics and uranium mineralization in the Bell-Wuerxun sag of the Hailar basin,this study use the method of structural analysis,back stripping,analogy method and paleocurrent analysis to clarify the dynamic process of tectonic evolution,paleotopography-geomorphic characteristics and ancient water system development with the data of regional hydrogeology,seismic and core data in the area.By reconstructing the ancient water system,we identified the sedimentary environment and rock geochemical environment of the metallogenic period,and preliminarily summarized the uranium metallogenic conditions in the area.The sedimentary strata since Cretaceous were divided into three hydrogeological cycles.In the first hydrogeological cycle,the weathering and leaching stage was favorable for uranium mineralization and the upper part of Yimin formation was the main prospecting target layer.The formation and evolution process of groundwater in the upper aquifer of Yimin formation was further analyzed.The extrusion water has limited transformation of primary sedimentary water,while the infiltration water has strong transformation of syngenetic sedimentary water.At the same time,the early and late paleocurrent directions of the upper Yimin formation was believed with obvious inheritance.In the Beier sag the direction was from southwest to northeast along the long axis,while in the Wuerxun sag the direction was from east to west.关键词
沉积水形成与演化/古地形-地貌/古水文地质/贝尔-乌尔逊凹陷/海拉尔盆地Key words
formation and evolution of sedimentary water/paleo topography-geomorphology/paleohydrogeology/Beier-Wuerxun sag/Hailaer basin分类
天文与地球科学引用本文复制引用
万宏峰,周文博,王长虹,张荣,穆海旗,封志兵..海拉尔盆地贝尔-乌尔逊凹陷古水文地质特征与铀成矿关系[J].铀矿地质,2025,41(5):822-835,14.基金项目
中国核工业地质局基金项目(编号:202102、202409-3)联合资助. （编号:202102、202409-3）
