华北地块中部新构造运动

由于印度板块持续向北运动，引起青藏高原的挤出，并于中新世末引起华北地块的向东挤出。大约在7.3 Ma，太行山西侧渭河盆地唐县面首先解体，继而向北、向东发展；到5 Ma左右，太行山东麓断裂带的右行走滑，导致华北中部唐县面全面解体，形成多个太行山内部山间盆地，以及太行山西侧山西地堑系。这些断陷盆地的断陷幅度各不相同，太行山西侧山西地堑系断陷幅度较大，太行山内部山间盆地断陷幅度较小，太行山东部的渤海湾盆地断陷活动不明显。伴随着盆地的形成，太行山相对进入快速隆升阶段。山西地堑系控盆断裂以及太行山东麓断裂带第四纪以来仍存在明显活动，切割并控制第四系，局部在地表形成地裂缝。华北地块中部的应力场恢复以及深部构造分析表明，深部地幔上涌对浅部伸展构造的形成具有重要的影响，深部构造演变与浅部构造演变具有高度的一致性和耦合性。太行山东部渤海湾盆地自中新世以来就进入拗陷阶段，断裂活动弱，构造演化与西侧差异较大，表明这期构造运动动力源于西侧，太行山东麓断裂带作为两侧差异演变的边界，调节着两侧的差异构造活动。

Neotectonics in the central North China block

The continuous northward movement of the Indian Plate lead to the extrusion of the Qinghai-Tibet Plateau, finally leading to an eastward extrusion of the North China block（NCB）at end Miocene. At about 7.3 Ma, the breakup of the Tangxian planation surface first took place in the Weihe Basin, then propagating eastward and northward. At about 5 Ma, the eastern Taihang Mountain fault zone began to right-laterally slip, resulting in regional breakup of the Tangxian planation surface, the development of the intermontane basins inside the Taihang Mountains and the Shanxi graben system to the west of the Taihang Mountains. The amplitudes of downfaulting of these basins are different, which are larger in the Shanxi Graben System than in the intermontane basins within the Taihang Mountains. With the formation of the basins, the Taihang Mountains began to uplift rapidly. Field investigation shows that the eastern Taihang Mountain fault zone is still active, cutting and controlling the deposition of the Quaternary, and resulting in ground fissures. The study of paleostress field and deep structures of the central NCB reveals that deep mantle upwelling played an important role in the formation of surface basins. Deep tectonics and shallow structures have a good or highly concordance and coupling. The Bohai Bay Basin on the east of the Taihang Mountains entered a stage of depression since the Miocene with weak fault activities, which show large difference with the west counterpart, implying the dynamics derived from the west, rather than the east. The eastern Taihang Mountain fault is a boundary of the two parts, adjusting the different tectonic activities between them.