可地浸砂岩型铀矿床航放弱铀异常研究及其找矿意义

认真研究新疆伊犁盆地南缘511、512两个已知可地浸砂岩型铀矿床的航放数据,发现矿体上方均存在微弱的航放铀偏高显示,由此提出了可地浸砂岩型铀矿床“弱铀异常”的新概念。基于地气运移机制和氡的接力迁移理论,探讨了“弱铀异常”的形成机理,介绍了航放弱铀异常的提取方法,指出高精度航放方法完全能探测到“弱铀异常”。弱铀异常可以作为一种直接标志信息运用于前期成矿预测。

Study on aeroradiometric weak uranium anomaly above in-situ leachable sandstone-type uranium deposit and its prospecting significance

Based on the serious study on aeroradiometric data above uranium deposits No.511 and No.512 at the southern margin of Yili basin,Xinjiang weak elevation of uranium content above uranium ore bodies has been discovered.Therefore,a new concept of "weak uranium anomaly"above in-situ leachable sandstone-type uranium deposit has been proposed.Moreover,on the basis of geogas migration mechanism and the theory of radon relay migration,the formation mechanism of"weak uranium anomaly"is discussed,and the extraction methods of aeroradiometric weak uranium anomaly are introduced,Finally,it is concluded,that"weak uranium anomaly"can be fully detected by high-sensitive aeroradiometric method,and that weak uranium anomaly can be applied to the early-stage prospecting prognosis as a kind of direct indication of information.