活动态U、Mo测量在SHTL地区砂岩型铀矿勘查中的应用

Application of determining U, Mo in mobile forms to exploration for sandstone-type uranium deposits, SHTL area, China

元素活动态测量是一种深穿透地球化学找矿方法。为了在北方砂岩型铀矿找矿中减小钻探的盲目性,实现快速评价,作者在二连盆地SHTL地区开展了壤中活动态U、Mo测量,以寻找砂岩型铀矿。选取U、Mo活动态中的黏土吸附态作为测量对象,在测区内共圈定壤中黏土吸附态U异常7 个、Mo异常5个。通过U、Mo异常评价并结合地质条件,预测了3个远景地段;经钻探验证发现了铀矿化,表明了活动态U、Mo测量寻找砂岩型铀矿床的有效性。建议在远景地段内进一步进行钻孔揭露。

The determination of element in mobile forms is one of the deep-penetrative geochemical exploration methods. In order to lessen blindness in drilling and bring out high efficient evaluation in prospecting sandstone-type uranium deposits in northern China, exploration for the deposits has been carried out by application of determining U and Mo in mobile forms of SHTL area, Eren Basin, China. The clay-absorbed form in soil is selected as the object of determination of U and Mo in mobile forms, and seven U anomalies and five Mo anomalies of clay-absorbed form in soil are outlined in surveyed area. Three prospective sections have been forecast by anomaly evaluation of U and Mo combining with geological condition, and uranium mineralization has been found through drilling confirmation, which show that the method of determination of U and Mo in mobile form is effective on exploration for sandstone-type uranium deposits. Further drilling is proposed in the prospective areas.