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渤海湾盆地属新华夏系第二沉降带的华北沉降区。第三纪以来,在区域性南北直扭应力作用下,产生了大规模的断裂活动,形成了统一应力场控制下的似反“S”形断陷盆地及其各类扭动构造形迹。其基本的构造特征为北东、北西两组断裂交织。前者具张扭性质,规模大,控制第三系沉积,为盆地的优势构造形迹;后者具压扭性质,规模小,对第三系沉积没有明显
The Bohai Bay Basin belongs to the subsidence area of North China in the second subsidence zone of Xinhuaxia. Since the Tertiary period, under the action of regional north-south straight-straightening stress, large-scale fault activities have been formed, and the anti-inverted “S” -shaped fault basins under the unified stress field and their various twist structures have been formed. Its basic structural features are north-east and north-west faults interlaced. The former has torsional properties, large scale and controlled Tertiary sedimentation, which is the structural tectonic trace of the basin. The latter has the characteristics of compression and torsion, small scale and no obvious deposition to the Tertiary