Tectonic framework and deformation events in the central Trans-North China Tectonic Belt during the Late Paleoproterozoic

被引：0
|
作者：
Zhao Y. [1 ]
Hu J. [1 ,2 ]
Gong W. [1 ,2 ]
Chen H. [1 ,2 ]
机构：
[1] Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing
[2] Key Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Natural Resources, Beijing
来源：
Earth Science Frontiers | 2019年 / 26卷 / 02期
关键词：
Deformation sequences; North China Craton; Paleoproterozoic; Tectonic framework; Trans-North China Tectonic Belt;
D O I：
10.13745/j.esf.sf.2019.2.8
中图分类号：
学科分类号：
摘要：
The Paleoproterozoic is a key period in the tectonic evolution of the North China Craton. Recently, the geologic property of the Trans-North China Tectonic Belt (TNCTB) has become the most controversial and focal point in the study of the North China Craton. In this paper, we redefined the tectonic framework of central TNCTB based on several convincing Paleoproterozoic ductile shear zones, including the Zhujiafang(EW-trending), the Wangjiahui(NEE-trending)and the Longquanguan(NE-trending) ductile shear zones, as they divided several Precambrian blocks named as Hengshan, Fanshi, Wutai, and Fuping. Different Precambrian metamorphic complex of unique composition formed the basement of each block, which has its own deformation characteristics and tectonic evolution history. These blocks have generally experienced multiple stages of metamorphism and deformation events. According to our research, three important tectonic events occurred in central TNCTB at the end of the Paleoproterozoic. First, the extrusion of the Fanshi block from SW to NE resulted in the deformation and southeastward thrusting of the Wutai block (D1). Next, the uplifting of the Fuping block and large-scale extension caused the Fuping complex uplifted to the near-surface (D2), which formed a series of low-angle and top-to-NW stretching ductile shear zones between the Fuping and Wutai blocks. Finally, NE-trending extension of the North China Craton led to the emplacement of the NW-trending mafic dykes swarm(D3). © 2019, Editorial Office of Earth Science Frontiers. All right reserved.
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页码：104 / 119
页数：15
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