摘要
目的研究东胜铀矿元素地球化学特征。方法根据东胜铀矿区含铀砂岩及其围岩样品中微量元素的含量分析结果,进行元素的富集特征计算及其结果的讨论。结果U,Ba,Zn,Zr,Hf,Pb等为铀矿的成矿指示元素;灰色粗砂岩与含矿岩石具有相同的成矿指示元素组合和稀土元素特征;灰白色高岭土化泥质粉砂岩形成于氧化环境,其元素富集特征和稀土元素地球化学特征均与含铀砂岩相近,为铀的迁移和富集提供了有利条件;灰绿色粗砂岩在成岩过程中经历了深部还原性热流体的作用。结论灰白色高岭土化泥质粉砂岩及灰绿色粗砂岩对铀矿的形成具有重要的意义,灰色粗砂岩具有良好的找矿潜力。
Aim To study the geochemical characteristics of elements in the Dongsheng uranium deposit, Ordos Basin. Methods Based on the analysis results of the trace element contents of the uranium-beating sandstone and its country rocks in the Dongsheng uranium deposit, calculate the enrichment factor of elements and discuss the results. Results The U, Ba, Zn, Zr, Hf, Pb elements has been considered the indicator elements in the forming of uranium ore, and the gray gritstone is analogical indicator elements and REE characteristics with the gray rock in the forming of uranium ore. The hoary kaolinized argillaceous siltstone was formed in oxidizing environment, and it＇s characteristics of element enrichment and REE geochemistry were analogical with the uranium-bearing sandstone, and wherefore it furnished a advanced condition to the uranium transfer and enrichment. The greyish green gritstone had undergone the action of deep-seated reducing heat fluid during its rock-forming process. Conclusion The hoary kaolinized argillaceous siltstone and greyish green gritstone have important signification for the uranium ore forming, the gray gritstone have favourable prospecting potentiality.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第2期291-296,共6页
Journal of Northwest University（Natural Science Edition）
基金
国家重点基础研究发展规划基金资助项目(2003CB2146)
