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| ANALYSIS OF CENOZOIC TECTONIC EVOLUTION AND ITS DYNAMIC BACKGROUND OF THE JIYANG DEPRESSION |
| LIU Jian-bao1, YUAN Dun-jia2, SONG Zhi-min1,3, LI Bing1, QU Yan-wei1, REN Jian-gang1 |
1. Henan Institute of Engineering, Zhengzhou 451191, China;
2. Xuchang Huajie Highway Survey and Design Co., Ltd., Xuchang 461000, Henan Province, China;
3. Kaifeng University, Kaifeng 475004, Henan Province, China |
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Abstract The balanced section method is adopted to calculate the directions of the first principal tensile stress during Cenozoic period in Jiyang depression. The result shows that the principal stress direction is NNE during Ek-Es4, NNW during Es3+2, NWW during Es1-Ed, and N-S in Neogene and Quaternary. The first principal stress directions are closely correlated with the fault activity, tectonic interface changing and subsidence history of the basin. The Jiyang depression is a composite basin which is dominated by rift and superimposed with strike slip. The basin has experienced four stages, namely, rift plus strike slip, strike slip, rift, and depression.
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Received: 11 October 2016
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2017, Vol. 26 
