摘要
研究区发育侏罗纪盆地和白垩纪盆地,侏罗纪盆地受近东西向断裂的控制,为东西向展布的断陷湖盆。白垩纪盆地受北东向断裂的控制,为北东向展布的断陷湖盆,经历早白垩世的伸展断陷及其以后的后期改造阶段。两大世代的盆地在空间上存在翘倾叠合、叠合保存、部分叠合改造等三种方式。盆地的叠合保存对侏罗系烃源岩的油气形成最为有利。
There exist Jurassic and Cretaceous basins in the Beishan Alaxa area. The Jurassic basins are controlled by near EW trending faults, and the faulted basins extend in EW direction. The Cretaceous basins controlled by NE trending faults extend in NE direction. The Cretaceous basins experience two stages of extensional faulted depression and late deformation. There exist three superposed manners of Jurassic and Cretaceous basins in space. They are titling superposition, superposed preservation and part superposition. The superposed preservation area of Jurassic basins are the most favorable for oil and gas formation.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2003年第4期384-389,共6页
Geotectonica et Metallogenia
关键词
侏罗纪盆地
白垩纪盆地
构造特征
盆地叠合
北山-阿拉善地区
Jurassic basin
Cretaceous basin
Structural characteristics
Basin superposition
Beishan-Alaxa area
