The formation and evolution of the Qinghai Lake had been mainly controlled by removement of south marginal large fault belt of Middle Qilian block, ZhongwulongshanQinghainanshan large fault belt and HeimaheDari large fault belt, the movement of faults with strikes in NWW, NW, NNW, SN and NE, and regional differential uplifting as well. Its formation and evolution had close relationship with uplifting of Qinghai-Tibet plateau, especially with negative inversion structure formed by change of stress field in Middle Pleistocne.
Ar-Ar thermochronological study show that during the late Cenozoic sustained sinistral strike- slipping of the Xianshuihe fault zone,the differential uplifting occurred in different part of the Fault zone.
The factors controlling Tangzhuang fault zones whose dip directions are oppo site each other are evolution environment of regional geology,structure background, boundary condition, lithology and rock fades variations, as well as the tilting-turning and differential uplifting of faulted blocks, etc.
The second hydrocarbon generation occurred from Cambrian to Permian periods. During these periods, although the area underwent differential uplifting movements with small scale and many large scale structures formed, the hydrocarbon generating of the source rocks continued, forming a number of pools.
Furthermore, our studies also show that the uplifting types of the mountain are variable in the different time periods, including uplifting of mountain as a whole and differential uplifting.
A high intensity of crustal movement around Shenzhen City area is shown by various determining methods, such as the amplitude and velocity of the differential uplifting and subsiding of the fault blocks, the hydro-thermal activities. the distributions of the block's stress and the activities of faults and seismicity sin Late Tertiary, especially since Holocene.The fault zone does not provide the geological background of occuring macroseisms. The evaluation of the regional stability in Shenzhen F...
By means of analysis of the archaeological data in the New Stone Age combined with the varieties of thickness of Holoene strata and the crustal deformation data, the present authors expounded the foutures of the subsidence of Taihu plain, and the differential uplifting and sagging movement of the eastern part of the plain, and the activity of the EW trending Fengxian-Nanhui and Kunshan-Jiading fault zones.
There are NNE and NNE-NE fault systems in the Dongpu depression. The NNE-NE fault system exists in Tangzhuang area. In this area,fault occurrence changes frequently,so that in 20km extent there occur 6 fault zones whose dip directions are opposite each other. The NNE fault system is mainly controlled by tension-torsional stress, and the NNE-NE fault system by these factors:boundary condition,sedimentary facies zone and regional tensional stress.The factors controlling Tangzhuang fault zones whose dip direct...