摘要
松辽盆地中、新生代经历了６个演化阶段，产生了多期地质和构造特征。在侏罗纪火石岭期和白垩纪青山口早期，该盆地发生了两次火山活动；由于岩石圈伸展和热活动加剧，上侏罗统和青山口组姚家组古地温明显升高（古地温梯度≥５６℃／ｋｍ，大地热流值也大于２．０ＨＦＵ）。沙河子组营城组构造层断裂及构造展布方向为ＮＮＥＮＥ向，断层为同生断层；青山口早期构造层断裂及构造主要以ＮＮＷ向展布，为先存断层复活张扭的结果；上白垩统新生界构造层构造为正反转构造，褶皱长轴方向为ＮＮＥＮＥ向，是先存构造逆向活动的产物。盆地发育两个油气系统，即沙河子组泉头组的含气系统和青山口组新生界的含油气系统。
The structural evolution of the Songliao basin in Mesozoic and Cenozoic consists of 6 stages:prerift,rift,depression,rerift,redepression and inversion.The geological and structural characteristics are developed during every stage.Volcanic rock formed during one of rift stages in late Jurassic and Qingshankou age.Because of increasingly intense stretching of lithosphere and heat activity,the palaeogeotemperature increased greatly in the upper Jurassic and QingshankouYaojia formation,its geothermal gradients are not less than 56℃/km,the palaeoheat flows are greater than 20 HFU.The faults and structures trend to NNENE in ShaheziYingcheng structural layer.The fault and stuctures in the early Qingshankou structural layer trend to NNW.The axes of the positive inverted structures in the upper Cretaceous and Cenozoic structural layer trend to NNENE.
出处
《江汉石油学院学报》
CSCD
北大核心
1997年第1期13-18,共6页
Journal of Jianghan Petroleum Institute
关键词
构造演化
构造特征
含油气系统
松辽盆地
structural evolution
structural characteristic
(petroleum system)
Cenozoic era
Mesozoic era
Songliao basin
