北山地区中口子盆地地球化学异常特征及其对铀矿勘查指示作用  

Geochemical anomaly characteristics and uranium deposit prospecting indication in Zhongkouzi Basin,Beishan Mountains

作　　者：靳拥护[1] 常磊[1] 彭成[1] 张鹏[1] 闫东汉 JIN Yonghu;CHANG Lei;PENG Cheng;ZHANG Peng;YAN Donghan(No.2 Geo-exploration Institute,Henan Provincial Bureau of Geo-exploration and Mineral Development,Zhengzhou 450000)

机构地区：[1]河南省地质矿产勘查开发局第二地质勘查院,郑州450000

出　　处：《矿产勘查》2020年第3期546-552,共7页Mineral Exploration

基　　金：内蒙古国土资源厅项目(编号:NMKD2013-50)资助。

摘　　要：北山地区中口子盆地地区存在大量的放射性异常,其找矿潜力十分巨大,但前人只对该地区的成油性进行过一定的探讨,对于该地区的放射性铀矿研究较少。本文通过对中口子盆地中生代地层元素分布、元素共生组合和地球化学异常分析研究,白垩系赤金堡组以放射性U元素为主的元素组合含量明显偏高,U、Th具备强富集强分异的特征,具备成矿物质基础;侏罗系芨芨沟组元素分布较均匀,龙凤山组整体含量偏低。白垩系中的AP10化探异常,元素组合为U、Mo、Pb、As、Sb、F、La、Y等,U、Mo、As异常对矿化具有直接的指示作用。通过对异常的分析认为盆地内侏罗系不具有成铀条件,白垩系地层中,铀矿形成经历了初步富集,表生改造从而富集成矿过程,为区域放射性元素找矿提供了新的思路。There are a lot of radioactive anomalies in Zhongkouzi Basin,Beishan Mountains,and its prospecting potential is very huge.However,previous studies have only discussed the oil-forming property of this area,and there are few studies on radioactive uranium deposits in this area.This article research the distribution of elements,element association and the analysis of geochemical anomaly of the Mesozoic strata in Zhongkouzi basin.In Cretaceous Chijinbao Formation,elements is given priority to with radioactive elements U content obviously on the high side,U,Th have strong enrichment and strong differentiation characteristics,having the ore-forming material base;The elements distribution of Jurassic Jijigou Formation is uniform.The content of Longfengshan Formation is low as a whole.AP10 geochemical anomalies in the Cretaceous,element combination is U,Mo,Pb,As,Sb,F,La,Y etc,U,Mo,As abnormal has direct instructions to the mineralization.Through the analysis of the anomalies,the basin in Jurassic have not uranium conditions,Cretaceous formation experienced the preliminary enrichment of uranium ore,surface modification and enrichment of ore-forming process.It provides a new idea for regional radioelement prospecting.

关 键 词：铀矿 异常特征 地球化学 白垩系 中口子盆地 北山地区 

分 类 号：P632[天文地球—地质矿产勘探]