The geochronologic unit is belonged to Early Age of Middle Devonian Epoch, and correspond to Eifelicus Stage-Jiweite Stage, and is belonged to Daminshan Formation of Devonian system.
时代属于中泥盆世早期，大体相当于艾菲尔阶-吉维特阶，应归属为大民山组。
From the geochronologic studies of sandstone-type uranium deposits, it is discovered that the ore-forming processes of sandstone-type uranium deposits are characterized by "episodes" and multi-stages.
通过对中国北方主要产铀盆地砂岩型铀矿成矿年代学研究，发现砂岩型铀矿的成矿作用具有“幕式”及多阶段性特征。
From the geochronologic studies of sandstone-type uranium deposits, it is discovered that the ore-forming processes of sandstone-type uranium deposits are characterized by "episodes" and multi-stages.
通过对中国北方主要产铀盆地砂岩型铀矿成矿年代学研究，发现砂岩型铀矿的成矿作用具有“幕式”及多阶段性特征。
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