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Geological evidence of the Cenozoic tectonic uplifting in Taihang Mountains——Apatite fission track evidence from Well Qincan 1

MENG Yuan-ku;WANG Xin-wen;CHEN Jie;State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences;School of Earth Sciences and Resources,China University of Geosciences;  
Apatite fission track rmochronolgy analysis from 12 samples in Well Qincan 1 of Qinshui basin,combined with the apatite-zircon fission track analysis from 9 samples of Shijiazhuang Xingtai,the results show that the uplifting of Taihang Mountains was unbalanced. Moreover,Taihang Mountains experienced pre-Cenozoic denudation-peneplaned process to uplift-erosion of the Paleogene,till the rapid uplifting of the Neogene.Since 23-18 Ma,Taihang Mountains main body formed. The rapid uplifting occurred in Taihang Mountains during the Pliocene,about 4 000 m uplifting and the average rate of uplifting 0. 18 mm / a. The Neogene uplifting of Taihang Mountains was attributed to three factors: 1 the remote effect of the Eurasian plate collision;2 the geothermal cooling; 3 the structural loads. The Cenozoic uplifting events are corresponding with the tectonic evolution of the adjacent basins and mountains,a regional uplifting event in North China.
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