Timing of the initiation of the Jurassic Yanshan movement on the North China Craton: evidence from sedimentary cycles, heavy minerals, geochemistry, and zircon U-Pb geochronology

doi:10.1080/00206814.2013.855013

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院地质力学研究所

	Timing of the initiation of the Jurassic Yanshan movement on the North China Craton: evidence from sedimentary cycles, heavy minerals, geochemistry, and zircon U-Pb geochronology
	Li, Zhen-Hong 4; Dong, Shu-Wen ; Qu, Hong-Jie
刊名	INTERNATIONAL GEOLOGY REVIEW
	2014
卷号	56 期号:3 页码:288-312
关键词	Jurassic sedimentary cycles heavy minerals geochemistry of clastic rocks zircon U-Pb geochronology
ISSN号	0020-6814
DOI	10.1080/00206814.2013.855013
英文摘要	A series of significant geological changes indicated by deformation, magmatic-metallogenic systems, and the climate and environment occurred in East Asia during Late Jurassic to Early Cretaceous time, but the timing and development of the Yanshan movement' on the north margin of the North China Craton has not been well-established. Based on the evidence of tectonic deformation and magmatic activity, previous studies resulted in two views of the beginning of the Yanshan movement: Early Jurassic vs. late Middle Jurassic. In this work, the timing of the initial Yanshan movement was investigated by examining the Jurassic Chenjiabangou section in the Ningwu-Jingle basin overlying the north-central part of the North China Craton. The timing of the initial Yanshan movement was constrained by restoration of stream flow directions, determination of boundaries of sedimentary cycles, identification of heavy mineral assemblages in clastic rocks, quantification of changes in chemical compositions, and zircon U-Pb isotope dating. The results indicate that the basal conglomerates of the Middle Jurassic Yungang Formation (Bathonian) mark the beginning of the Yanshan movements. Evidence supporting this conclusion includes the following. (1) The switch from transgressive lacustrine deposition to regressive lacustrine deposition in the Yungang Formation sedimentary succession indicates a change from extension to compression, possibly reflecting uplift. (2) Early-stage clastic rocks rich in quartz and feldspar are replaced by feldspar detritus in late-stage clastic rocks; the heavy mineral assemblage dominated by zircon at the early stages changed to garnet-dominated assemblage upsection. Moreover, the concentrations of CaO, MgO, CO2, and Fe2O3+FeO and the Fe2O3/FeO ratio changed abruptly near the basal conglomerates of the Middle Jurassic Yungang Formation, suggesting increased denudation. (3) Conglomerates at the bottom of the Middle Jurassic Yungang Formation were deposited approximately 168 million years ago, as inferred from the age of zircons in tuffaceous micrite (160.6 +/- 0.55Ma) at the bottom of the Upper Jurassic Tianchihe Formation (Oxfordian) and the age of zircons in pyroclastic rocks (179.2 +/- 0.79Ma) in the Lower Jurassic Yongdingzhuang Formation (Toarcian). These lines of evidence indicate that initial Jurassic Yanshan movement began 168million years ago during Middle Jurassic time.
学科主题	构造地质学
WOS关键词	NATURAL REFERENCE MATERIAL ; THRUST BELT ; TECTONIC EVOLUTION ; GREENSTONE-BELT ; INNER-MONGOLIA ; EASTERN CHINA ; NE CHINA ; BASIN ; PROVENANCE ; BLOCK
WOS研究方向	Geology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000328188300002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41030]
专题	中国地质科学院地质力学研究所
作者单位	1.[Li, Zhen-Hong 2.Chinese Acad Geol Sci, Inst Geomech, Beijing, Peoples R China 3.Chinese Acad Geol Sci, Beijing, Peoples R China 4.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Li, Zhen-Hong,Dong, Shu-Wen,Qu, Hong-Jie. Timing of the initiation of the Jurassic Yanshan movement on the North China Craton: evidence from sedimentary cycles, heavy minerals, geochemistry, and zircon U-Pb geochronology[J]. INTERNATIONAL GEOLOGY REVIEW,2014,56(3):288-312.
APA	Li, Zhen-Hong,Dong, Shu-Wen,&Qu, Hong-Jie.(2014).Timing of the initiation of the Jurassic Yanshan movement on the North China Craton: evidence from sedimentary cycles, heavy minerals, geochemistry, and zircon U-Pb geochronology.INTERNATIONAL GEOLOGY REVIEW,56(3),288-312.
MLA	Li, Zhen-Hong,et al."Timing of the initiation of the Jurassic Yanshan movement on the North China Craton: evidence from sedimentary cycles, heavy minerals, geochemistry, and zircon U-Pb geochronology".INTERNATIONAL GEOLOGY REVIEW 56.3(2014):288-312.