准噶尔盆地基底结构特征及其对砂岩型铀矿成矿的影响

摘要

Based on the comprehensive analysis of acquired geophysical,geological and paleontological and isotope research data,authors suggest that the basement of Junggar basin is of continental crust property composed of Precambrian crystalline basement and Hercynian fold basement.Such “double”layer basement structure might be more practical and is comparable to that of those in U-producing basins such as Yili,Turpan—Hami and Erdos typical uranium-producing basin.It indicates that the Junggar basin posseses basic conditions for the metallogenesis of sandstone type uranium deposits to some extent.%本文通过对已取得的地球物理、航空磁测、同位素地质年代及古生物等方面研究成果的进一步整理分析，认为准噶尔盆地基底为陆壳性质、存在前寒武纪结晶基底，且与其上的海西期褶皱基底构成了“双层基底”的认识更为接近实际；准噶尔盆地这种由前寒武纪结晶基底与海西期褶皱基底组成的“双层”基底结构，与伊犁、吐哈、鄂尔多斯等典型产铀盆地的基底相似，具备了砂岩型铀矿成矿的基底条件。