The tectonic movements and the paleo-tectonic stress field features after Mesozoic period in the joint area among southern Anhui,Zhejiang and Jiangxi
Pan Guolin1,2, Hu Zhaoqi3, Zhu Qiang3, Jiang Laili3
1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009;
2. Geological Survey of Public Service Management Center in Anhui Province, Hefei 230001;
3. Geology Survey of Anhui Province, Hefei 230001
The joint area among southern Anhui,Zhejiang and Jiangxi is adjacent to east-southern continental margin between China plate and Pacific plate,where several periods of tectonic movements have taken place after Mesozoic period. Therefore,it is the ideal region for study on the tectonic movements. On the systematic structure analyses in field,four periods of tectonic movements have been certified,and the paleo-tectonic stress state has been reconstructed. The first tectonic movement is behave as S-N direction compression,was probably taken place from Early Jurassic to end of Middle Jurassic,and is possibly associated with the last collision between the North China block and the South China block. The paleo-tectonic stress state of the second period is characterized by NE-SW direction compression,is related to the S-SW ward subduction of Pacific plate during Early Cretaceous. The paleo-tectonic stress states of the third period is behave as NW-SW direction compression,is possibly associated with the north-westward subduction of Pacific plate at the Late Cretaceous. The paleo-tectonic stress states of the fourth period is behave as E-W direction compression,is probably associated with the W-NW ward compression derived from the back-arc extension of Pacific plate and the eastward extrusion derived from the collision between India plate and Euro-Asian plate.
. The tectonic movements and the paleo-tectonic stress field features after Mesozoic period in the joint area among southern Anhui,Zhejiang and Jiangxi[J]. Chinese Journal of Geology, 2014, 49(2): 417-430.