气候变化领域集成服务门户(CCPortal): Magnetostratigraphic ages of the Cenozoic Weihe and Shanxi Grabens in North China and their tectonic implications

CCPortal

DOI	10.1016/j.tecto.2021.228914
	Magnetostratigraphic ages of the Cenozoic Weihe and Shanxi Grabens in North China and their tectonic implications
	Chen X.; Dong S.; Shi W.; Zuza A.V.; Li Z.; Chen P.; Liu J.; Hu J.; Han B.
发表日期	2021
ISSN	00401951
卷号	813
英文摘要	It has long been debated whether the formation of the Cenozoic Weihe and Shanxi grabens in North China was induced by the Indo–Asia collision or Pacific Plate subduction. Deciding between these two models requires precise knowledge of the timing of the graben formation. In this study, we used high-resolution magnetostratigraphy to suggest that the age of a ~ 1644-m thick syn-rift section conjoining the two grabens spanned from ~54.3 to ~3 Ma. The section is marked by three unconformities dated at ~26, ~12, and ~ 7 Ma. The precise ages, combined with field observations, indicate the following: the Weihe Graben underwent four rifting stages that started at ~54.3 Ma, whereas the Shanxi Graben opened at ~7 Ma. The synchronous timing between the basin development and uplift history of the Qinling Range strongly suggests that the Cenozoic extension across the Weihe and Shanxi grabens was coupled with left-slip faulting bounded at the northern edge of the Qinling. As the Qinling left-slip fault indicates eastward extrusion during the northward penetration of India, our work supports the early hypothesis that the opening of the north-trending rifts in North China was associated with the Cenozoic Indo–Asia collision. As the basin history across the Weihe and Shanxi grabens can also be correlated with the Bohai Bay evolution along the eastern margin of East Asia, the Pacific Plate may have also played a role in forming the two grabens. We conclude that the Cenozoic extension across North China has been controlled by both the Indo–Asia collision and back-arc tectonics induced by westward subduction of the Pacific Plate. © 2021
关键词	Cenozoic Fenwei Graben Indo–Asia collision Magnetostratigraphy Weihe Graben
英文关键词	Geophysics; Physics; Basin development; Cenozoic extension; Field observations; High resolution magnetostratigraphy; Pacific plates; Shanxi grabens; Tectonic implications; Work support; Faulting; arc-continent collision; basin evolution; Cenozoic; extensional tectonics; graben; magnetostratigraphy; Pacific plate; rift zone; subduction; uplift; China; Guanzhong Plain; Shaanxi; Shanxi Rift
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207957
作者单位	China Railway First Survey & Design Institute Group CO., LTD., Xi'an, 710043, China; Institute of Geomechanics, Chinese Academy of Geosciences, Beijing, 100037, China; School of Earth and Space Science, Peking University, Beijing, 100871, China; School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210093, China; Nevada Bureau of Mines and Geology, University of Nevada, Reno, Reno, NV 89557, United States; School of Civil and Architecture Engineering, Xi'an Technological University, Xi'an, 710021, China
推荐引用方式 GB/T 7714	Chen X.,Dong S.,Shi W.,et al. Magnetostratigraphic ages of the Cenozoic Weihe and Shanxi Grabens in North China and their tectonic implications[J],2021,813.
APA	Chen X..,Dong S..,Shi W..,Zuza A.V..,Li Z..,...&Han B..(2021).Magnetostratigraphic ages of the Cenozoic Weihe and Shanxi Grabens in North China and their tectonic implications.Tectonophysics,813.
MLA	Chen X.,et al."Magnetostratigraphic ages of the Cenozoic Weihe and Shanxi Grabens in North China and their tectonic implications".Tectonophysics 813(2021).