Preliminary Study on Kinematic Characteristics of Related Blocks in Yuncheng Basin
Yuncheng Basin is a typical development area of normal faults and fault basins.Under the control of faults,major uplift blocks such as Zhongtiaoshan block,Emeitai block and Mingtiaogang block are developed in northeast direction.Based on the com-parative analysis of a large number of boreholes(profiles)and paleomagnetic data on the relevant blocks in the basin,combined with the relevant fault activity rate,the evolution process and movement mode of the main tectonic units in the study area are discussed.The following conclusions are obtained:Zhongtiaoshan block,Emei block and Mingtiaogang block all have clockwise tilting deforma-tion;The Emitai block and Mingtiaogang block are uplifted in the direction of NE to SW.In the late Pliocene,the average tilt of the north and south sides of Zhongtiao Mountain is more than 100 m,and the tilt Angle is not large.The activity amount and activity rate of boundary faults controlling the block are positively correlated with the uplift of the block.The structural model image of Yuncheng Basin is preliminarily discussed and established.
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