我国硬质耐火粘土中的铝土矿结核(非指豆鲕及蚕豆结构)迄今尚无人正式研究和报导过,而沉积岩中的后生结核,Тимофеева认为“在文献中尚未见到过”。作者对我国河北某盆地二迭系硬质耐火粘土中的铝土矿结核进行了研究,并确定其主要为后生作用所形成。现将研究结果简要报导于后。二迭系硬质粘土中铝土矿结核主要分布在盆地的西翼。这种铝土矿的结核呈椭球及正球形,圆度较高,直径一般多在3～5厘米左右。实测九十余个结核,得知其长径多平行于岩层层理,也有少数垂 Bauxite nodules (non-fingerling bean and broad bean structures) in China’s hard-refractory clay have so far not been officially studied and reported, while the epigenetic tuberculosis in sedimentary rocks, Тимофеева, is “not seen in the literature”. The authors studied the bauxite nodules in Permian hard refractory clay in a certain basin of Hebei Province and determined that they are mainly formed by epigenetic effects. Now the results of a brief report later. The billet of hard clay in the bauxite nodules are mainly distributed in the western wing of the basin. This bauxite nodules were ellipsoid and are spherical, roundness higher, the general diameter of about 3 to 5 cm. More than ninety nodules were measured, and it was found that their major axes were parallel to the bedding planes and there were also a few vertical ones