鄂尔多斯盆地北部早白垩世盆地动力学转变与砂岩型铀矿成矿关系探讨

文章从沉积相的分析人手，发现鄂尔多斯盆地北部下白垩统下部宜君组、洛河组、环河组（或伊金霍洛组）和上部罗汉洞组、泾川组（或东胜组）之间存在着沉积相的突变关系，认为该区早白垩世盆地动力学性质发生了根本性的转变。该时期动力学性质的转变恰与区内铀的主要成矿期相吻合，据此探讨了盆地动力学转变与铀矿成矿作用的关系。

Relation between the conversion of basin-dynamics in Early Cretaceous and sandstone type uranium mineralization in the north of Ordos basin

Start with the analysis of sedimentary facies,the author found out that in the north of Ordos basin there is an sedimentary face break between the Yijun formation,Luohe formation,Huanhe formation(or Yijinhuoluo formation) of the lower part of Lower Cretaceous and the Luohandong formation,Jingchuan formation(or Dongsheng formation) of the upper part of Lower Cretaceous and it was realized that in Early Cretaceous the dynamic property of the basin had taken place a fundamental conversion.The further study found that the conversion period of dynamic property was accord with the main mineralization period in this area.For reasons given above,discussion on the relation between the conversion of the basin dynamic property and the uranium mineralization are carried out.