摘要
在纳米比亚欢乐谷南部地区开展的活性炭吸附测氡方法应用试验结果显示,氡异常能够较好地反映隐伏钙结岩型铀矿化信息,而且铀矿体上方土壤中的氡浓度随深度增大的变化率要明显大于无矿地段,前者为后者的5~16倍。在测区的西南部圈定了一处面积约为5km2的氡异常,经地质探槽揭露,伽马能谱当量U含量高达500×10-6,并在探槽内发现了次生铀矿物,推断此处氡异常是由钙结岩型铀矿化引起的,为进一步的地质找矿工作提供了有价值的线索。
Activated charcoal was used to measure the radon concentration in the south of Gaudeanmus area, Namibia Pilot and application of radon measurement using activated carbon were carried out in southern Happy Valley area, Namibia. The test result showed that U ore bodies were manifested as a high and sharp radon anomaly. The variation of radon concentration with depth over the known uranium mineralization is much higher than that over the barren area, and the change rate of the former is about 5 to 16 times of the latter. A new anomaly area of 5 km2 was delineated in the southwest of working area with known clacrete-type uranium mineralization. After geological trench checking, the anomaly was found with 500 × 10-6 eq U by gamma ray spectrum and secondary uranium mineral was discovered which indicated that this anomaly is probably caused by the concealed ealcrete uranium mineralization.
作者
王勇
刘洪军
范洪海
吴国东
WANG Yong LIU Hongjun FAN Honghai WU Guodong(CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology, Beijing Research Institute of Uranium Geology, Beijing 100029, China)
出处
《铀矿地质》
CAS
CSCD
2017年第5期296-301,共6页
Uranium Geology
关键词
活性炭
氡气测量
钙结岩型铀矿床
放射性测量
纳米比亚
activated carlcoal
radon measurement
calcrete-type uranium deposit
radiometric survey
Namibia