柴达木盆地北缘地区中生代盆地性质探讨  

Nature of Mesozoic basins in the northern edge of Qaidam basin

作　　者：刘志宏[1] 杨建国[2] 万传彪[1] 刘振文[2] 张立国[2] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]大庆油田勘探开发研究院,黑龙江大庆163712

出　　处：《石油与天然气地质》2004年第6期620-624,共5页Oil & Gas Geology

基　　金：九五"国家自然科学基金重点项目 (4 983 2 0 40 ) ;大庆油田有限责任公司勘探开发研究院项目"柴北缘各三级构造地震地层解释

摘　　要：柴达木盆地北缘地区在侏罗纪主要受伸展构造体制控制 ,发育一系列规模较小的箕状断陷盆地。断陷中的中、下侏罗统沉积作用明显受断层控制 ,为断陷盆地。上侏罗统的沉积作用基本不受断层控制 ,为坳陷盆地。在白垩纪 ,柴北缘地区主要受挤压构造体制控制 ,在祁连山山前形成断层传播褶皱 ,沉积作用受挤压作用过程中形成的断层传播褶皱控制 。A series of half graben like faulted basins were developed in Jurassic in the northern edge of Qaidam basin, which was mainly controlled by extensional tectonic framework. The sedimentation of the Middle and Lower Jurassic in the fault depression was remarkably controlled by faults, thus the Early Middle Jurassic basin was faulted basin. While faults basically had no impacts on the sedimentation of the Upper Jurassic, thus the Late Jurassic basin was a downwarped basin. In Cretaceous, the northern edge of Qaidam basin was mainly controlled by compressional tectonic framework, with fault propagation folds to be formed in the process of compression in the foreland of Qilianshan. The Cretaceous sedimentation was controlled by the fault propagation folds formed during the process of compression, thus the Cretaceous basin was a compressional basin.

关 键 词：中生代 断陷盆地 坳陷盆地 压性盆地 柴达木盆地 

分 类 号：TE111.1[石油与天然气工程—油气勘探]