中条山地区四〇五铀矿床矿化特征及控矿因素分析  

Anslysis of minerslization characteristics and ore-control factors of 405 U deposit in Zhongtiaoshan area Shanxi province

作　　者：裴柳宁 武正乾 张良 冯博 PEI Liuning;WU Zhengqian;ZHANG Liang;FENG Bo(No.203 Rearch Institute,CNNC,Xi'an 710086,Shaanxi Province,China)

机构地区：[1]核工业二〇三研究所,西安710086

出　　处：《地质找矿论丛》2025年第1期45-52,共8页Contributions to Geology and Mineral Resources Research

基　　金：核工业地质局铀矿地质项目“华北陆块元古宇富大铀矿成矿环境研究”(编号:202204-3)资助。

摘　　要：华北陆块中条山地区具有较大的硬岩型铀成矿潜力,为了扩大硬岩型铀矿资源量,重点解剖四〇五矿床铀矿化特征及控矿因素。四〇五铀矿床位于中条山地区南部,矿体赋存于神仙岭复式岩体的外接触带,受控于架桑莫峪沟壳层大断裂及其次级断裂,呈似层状、透镜状、薄板状产出。矿化产于中条群篦子沟组中上部蚀变大理岩与石英片岩之间的构造层间破碎带,为区域变质、叠加热液改造成因。破碎带样品具有较高的Mg、Ca、Fe、S、Mn含量,U含量最高,中等富集轻稀土,重稀土相对较富集。铀矿物沿层间破碎带分布,靠近大理岩发育,以晶质铀矿为主,伴生沥青铀矿及钛铀矿。矽卡岩化、硅化、透闪石化及碳酸盐化等围岩蚀变是有利的找矿标志,层间破碎带是下一步攻深找盲探索富矿体的关键。Zhongtiaoshan area in north China block is potential for prospecting hard rock-hosted U deposit.U mineraliztion characteristics and ore-control factors are explored to expand such U mineral resources.405 U deposit is located in south Zhongtiaoshan area.Ore bodies occur in the outer contact zone of Shenxianling pluton as layeroid,lenticular and tabulate bodies and are controlled by major crustsl Jiasang-Moyugou fsult and the sub-faults.In structural fractural zone between altered marble and quartz schist at upper part of Bizigou formation of Zhongtiaoshan Group is developed the mineralization.The deposit is genetically a regional metamorphic and hydrothermal fluid-reworked deposit.Content of Mg,Ca,Fe,S and Mn of samples from the fractural zone is high and the U content highest.In addition REE show medium enrichment but HREE relatively enriched.U minerals are developed in the fractural zone near the marble.Uraninite is the main U mineral acompaied by pitchblende and brannerite.Skarnization,silicification,tremolitization carbonatization are the marks and the interformational fractural zone is the key for further prospecting in the area.

关 键 词：四〇五铀矿床 硬岩型铀矿床 铀矿化特征 控矿因素 找矿标志 中条山地区 

分 类 号：P619.14[天文地球—矿床学]