粤北下庄矿田竹筒尖铀矿床矿体特征研究

Orebody characteristics of Zhutongjian uranium deposit in Xiazhuang ore field,Northern Guangdong Province

本文在分析粤北下庄矿田竹筒尖铀矿床成矿地质背景和矿体特征的基础上,总结了控矿因素,认为:3号组带在各中段产状、规模稳定,铀矿体的厚度、品位随着矿体标高的减小而减小;矿体在标高690~250 m中段皆有分布,但品位大于0.1%的矿体多集中在标高690~570 m中段,品位的变化范围相对较小,矿体较稳定;矿床中大多数铀矿体较分散,呈透镜状分布,连续性较差,在构造走向、倾向上存在尖灭再现的现象,构造带及矿体往深部延续较差。

Based on the analysis of the metallogenic geological background and ore-body characteristics of Zhuotongjian uranium deposit in Xiazhuang ore field,Northern Guangdong Province,this paper summarizes the ore-controlling factors.It is considered that No.3 zone is stable in occurrence and scale in each middle section.The thickness and grade of uranium ore body decrease with the decrease of the elevation of ore body.The ore bodies are distributed in the middle section of 690~250 m elevation,but the ore bodies with grade greater than 0.1%are mostly concentrated in the middle section of 690~570 m elevation,the variation range of grade is relatively small,and the ore bodies are stable.Most of the uranium ore bodies in the deposit are scattered,in a lenticular shape,poor continuity.There is a phenomenon of pinch-out recurrence in the structural strike and inclination,and the structural belt and ore body have poor continuation to the depth.