摘要
根据天然气热发光、微量元素、微体古生物等资料的对比,二连盆地可划分为南北两个拗陷体系。二连-贺根山岩石圈断裂和西拉木伦岩石圈断裂对拗陷体系的形成起着重要作用,拗陷的形态、延伸均依附于此两断裂。南北带的油源同属下白垩统,但成熟度不同,南带有上二叠统油混入的可能。上二叠统或古生界地层的油源是不容忽视的。因为历史事件(岩浆活动和变质作用等)的不平衡发展是地槽褶皱带的普遍规律。在古生界找油有其重要的现实意义。
According to Correlation of thermoluminescence, trace element and microfossil, Er-lian Basin can be divided into two depression systems, i.e. South belt and North belt. In the process of development of depression systems the Erlian-Hegengshan Lithospheric fracture and Xilamulung lithospheric fracture played the most important role. Thus the extension of depression complately coincides with the direction of the fractures. South belt and North belt produce crude oil derived from lower Cretacious. But maturation of them differ from each other, and it is possible that oil derived from Upper permian mixed in Cretacious oil.The oil in Upper Permian or Paleozoic strata should not be left out of consideration, because uneven development of historical event (such as magmatism and metamorphism etc.) is a universal law of geosynclinal fold belts. Prospects of oil and gas in Paleozoic strata is great immediate significance.
出处
《地质科学》
CAS
CSCD
北大核心
1990年第1期22-36,共15页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
盆地
拗陷体系
油源
岩石圈
断裂
lithospheric fracture, depression systems oil source, maturation
