鄂尔多斯盆地南缘崇信-泾川地区航放异常特征及铀矿找矿前景分析

Characteristics of Aerial Radioactive Anomalies and Prospect of Uranium Exploration in the Chongxin-Jingchuan Area,Southern Margin of Ordos Basin

研究区位于鄂尔多斯盆地南缘西部,处于天环凹陷东南部,分布有3147崇信和319焦家会砂岩型铀矿点。笔者依据对前人资料的收集、整理,利用地质剖面测量、地面伽玛总量测量、地面伽玛能谱测量、土壤氡剖面测量及岩石取样分析对研究区分布的HFU-53号异常进行了查证,结合查证结果,对区内铀成矿条件进行分析,探讨了铀找矿前景。分析认为崇信-泾川地区存在有利的找矿目的层,具备较好的砂岩型铀成矿条件,航空放射性异常区是重点找矿地段,筛选了1处铀找矿有利区。该研究成果对加快推进该地区铀矿产资源勘查具有指示意义。

The research area is located in the southeast of the Tianhuan depression,west of the southern margin of Ordos Basin,where 3147 Chongxin and 319 Jiaojiahui sandstone-type uranium ore spots have been discovered.This work was based on the collection and collation of previous data.The aerial radioactive anomaly HUF-53 in the study area was characterized and verified by using geologic profile measurement,surface gamma full measurement,surface gamma spectrum measurement,soil radon profile measurement and rock sampling and analysis.Combined with these data,the uranium mineralization conditions were analyzed and the prospect of uranium exploration was discussed for this area.It is concluded that there are favorable ore-search zones in the Chongxin-Jingchuan area,which possess better conditions of sandstone-type uranium mineralization.The places with aerial radioactive anomalies are the key prospecting targets,from which a favorable section for uranium prospecting was chosen.This work will assist in spurring the exploration of uranium resources in this region.