伊犁盆地扎吉斯坦北部西山窑组下段砂体发育特征与铀成矿的关系

本文初步研究了扎吉斯坦北部砂体的发育特征与铀成矿的关系。通过对研究区单井剖面、联井剖面以及平面上砂体发育情况的研究与分析,探讨砂体对铀矿体的控制与影响。研究表明,铀矿化发生、发育于砂体厚度相对稳定,粒度较粗,孔隙度、渗透率较好的地段。砂体构形变化的部位是成矿的有利部位,即砂体厚度由厚变薄的过渡地段有利于铀矿的富集。

Sandstone development and uranium mineralization in the lower member of the Xishanyao Formation, northern Zhajisitan, Yili Basin

In the light of a single-well section and a well-tie section and spatial distribution of the sandstones,the present paper focuses on the relationship between the sandstone development and uranium mineralization,and controls and effects of the sandstones on the uranium orebodies in the lower member of the Xishanyao Formation in the northern part of the Zhajisitan area,Yili Basin.The results of research in this study show that the uranium mineralization occurs in the areas with stable thickness,coarser grain sizes and well-developed porosity and permeability of the sandstones.The zones with variable sandstone configurations,i.e.,the transitional parts where the sandbodies are thining out are believed to be the favourable zones for the uranium mineralization.