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渤海盆地主要构造特征是盆地内广泛发育同沉积生长断裂。这些断裂绝大多数是张性或剪张性 ,主要构造类型有伸展构造、走滑构造和反转构造等。渤海中、新生代盆地发育巨厚的陆相沉积。第三纪是渤海中、新生代盆地的主要断陷成盆时期 ,下第三系沙河街组四段孔店组零星分布 ,残缺不全 ,盆地狭小 ;沙河街组三段东营组沉积广泛 ,盆地变宽。上第三系十分发育 ,并在渤中地区形成盆地的沉降中心。从构造沉积环境图分析 ,渤海西部的沉积相受NW向断裂控制 ,而东部的沉积相受NNE向断裂控制。渤海主要控盆断层的生长指数反映渤海中、新生代主要有三期断层活动高峰期 :中生代、沙河街组二、三段沉积期和东营期 ,其中沙河街组三段沉积期是构造活动和沉积作用最强烈的时期
The main structural feature of the Bohai Basin is the widespread development of syndepositional growth faults in the basin. Most of these faults are extensional or extensional, with the main tectonic types being extensional structures, strike-slip structures and inversion structures. Bohai Sea, the Cenozoic basin developed thick continental deposition. The Tertiary is the main faulted basin formed during the Mesozoic and Cenozoic basins in the Bohai Sea. The Kongdian Formation in the fourth member of the Lower Tertiary Shahejie Formation sporadically distributed incompletely and the basin was narrow. The Dongying Formation in the third member of Shahejie Formation is widely distributed. The basin Widening. The tertiary system developed very well and formed the basin subsidence center in the Bozhong area. From the analysis of tectonic sedimentary environment, the sedimentary facies in western Bohai Sea is controlled by NW faults, while the sedimentary facies in the eastern part are controlled by NNE faults. The growth index of main control basin faults in the Bohai Sea reflects that the Cenozoic mainly has the third-phase fault activity peak in Mesozoic and Cenozoic: the Mesozoic and Shahejie Formation deposition periods of second and third periods and Dongying period, and the sedimentary period of the third member of Shahejie Formation is tectonic activity and sedimentation The most intense period of time