Ra法找矿及其在异常评价中的应用

本文介绍带电收集片测定土等粉末样品的 Ra 含量来找 U 矿的方法,称为 Ra 法。此法灵敏度高,操作简便,成本低,可以使用~(210)Po 法曲仪器和铜片,便于推广使用。文中介绍了测 Ra 流程,测定误差和灵敏度.Ra 法在详查和区调阶段的用途。总结了深部盲矿、地表矿化和非矿异常地段上地表的 Ra、Po 和γ异常的特征,指明 Ra 法和 Po 法结合可用于评价异常,提高找深部铀矿的能力。

RA METHOD MINERAL PROSPECTING AND APPLICATION IN THE ABNORMAL EVALUATION

This paper introduces a method for uranium prospecting called Ra method which is used to detmine,the Ra content in the powdery samples of the soilby electrified collectors.The instument for this method is sensitive,easy to operate and cheap in cost.This method can be easily popularized if it is used combined with the instrument and copper plates for the ~(210)Po method.This paper also presents Ra determination process,errors and sensitivity.The results got from nine mines show the uses when employing Ra method in the defail reconnaissance and regio nal survey,sums up the features of Ra Po and abnormals on the surface about the deep blind ores,surficial mineralization and non-mineralized sections,and indicates that Ra method combined with Po method can be used to evaluate abnormals and to raise working efficiency in the search of the deep uranium minerals.