活性炭吸附测氡法在北秦岭柳树湾铀矿床勘查中的应用

Application of Activated Charcoal Radon Survey Method in the Exploration of Liushuwan Uranium Deposit in North Qinling Orogen,China

在北秦岭东段柳树湾地区开展的活性炭吸附法测氡实验结果表明,该地区氡浓度异常峰值高、连续性好,总体呈北西走向,主要沿岩体与地层接触带中的伟晶岩走向分布,其分布范围及规模明显受伟晶岩控制。通过对发现的氡浓度异常点进行钻探验证表明,氡浓度异常均为矿致异常,与深部含矿伟晶岩密切相关,能够很好的反映出隐伏伟晶岩的铀矿化信息。该方法为确定铀矿找矿有利地段提供了重要依据,对本区花岗伟晶岩型铀矿深部找矿具有重要的指导意义。

Radon survey of activated carbon method was used in the uranium exploration in Liushuwan area,the eastern of North Qinling.The experimental results found a anomaly with good continuity and high value.The anomaly extend overall northwest along the strike of pegmatite dyke in the contact zone between pluton and strata,and its distribution and scale are significantly controlled by the pegmatite.Drilling in the radon anomaly verified that the anomaliy is closely related to deep buried ore-bearing pegmatite.Therefore the radon anomaly can reflect the uranium mineralization information of concealed pegmatite and can be used as an important evidence to determine the target area for uranium exploration in the study area.