Table of Contents
Journal of Geological Research
Volume 2012, Article ID 291467, 11 pages
http://dx.doi.org/10.1155/2012/291467
Research Article

The Mesozoic Tectonic Dynamics and Chronology in the Eastern North China Block

1Graduate University of Chinese Academy of Sciences, Beijing 100049, China
2School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
3Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received 12 January 2012; Revised 9 May 2012; Accepted 11 May 2012

Academic Editor: Yu-Dong Wu

Copyright © 2012 Quanlin Hou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mesozoic tectonic events in different areas of the eastern North China Block (NCB) show consistency in tectonic time and genesis. The Triassic collision between NCB and Yangtze results in the nearly S-N strong compression in the Dabie, Jiaodong, and west Shandong areas in Middle Triassic-Middle Jurassic. Compression in the Yanshan area in the north part of NCB was mainly affected by the collision between Mongolia Block and NCB, as well as Siberia Block and North China-Mongolia Block in Late Triassic-Late Jurassic. However, in the eastern NCB, compressive tectonic system in Early Mesozoic was inversed into extensional tectonic system in Late Mesozoic. The extension in Late Mesozoic at upper crust mainly exhibits as extensional detachment faults and metamorphic core complex (MCC). The deformation age of extensional detachment faults is peaking at 120–110 Ma in Yanshan area and at 130–110 Ma in the Dabie area. In the Jiaodong area eastern to the Tan-Lu faults, the compression thrust had been continuing to Late Mesozoic at least in upper crust related to the sinistral strike slipping of the Tan-Lu fault zone.The extensional detachments in the eastern NCB would be caused by strong crust-mantle action with upwelling mantle in Late Mesozoic.