Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China

doi:10.1002/2013TC003444

	Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China
	Li, Shan 3; Wilde, Simon A.; He, Zhengjun ; Jiang, Xiaojun ; Liu, Renyan ; Zhao, Lei
刊名	TECTONICS
	2014
卷号	33 期号:6 页码:960-981
ISSN号	0278-7407
DOI	10.1002/2013TC003444
英文摘要	Detrital zircon U-Pb dating of the Xingfuzhilu Formation in southern Inner Mongolia yields a maximum depositional age of around 220 Ma. The predominantly Permian and Triassic zircons are characterized by oscillatory zoning and euhedral shapes, with mostly positive zircon epsilon(Hf)(t) values (+2.0 to +16.4), indicating that they were derived from a proximal magmatic source. Early-Middle Paleozoic zircons have variable zircon epsilon(Hf)(t) values from -6.2 to +11.2 and are characterized by weak oscillatory zoning and subhedral-subrounded shapes, suggesting that the sources are a proximal magmatic arc, possibly mixed with components of the Ondor Sum magmatic arc and the magmatic arc at the northern margin of the North China Craton. The remnants of Precambrian blocks in the southeastern Central Asian Orogenic Belt (CAOB), and the North China Craton may also have been a minor source region for the Xingfuzhilu succession. These results, combined with regional data, indicate that a closing remnant ocean basin or narrow seaway possibly existed in the Middle Permian (Guadalupian) immediately prior to final collision of the CAOB and closure of the Paleo-Asian Ocean. Subsequent collision resulted in the crustal uplift and thickening along the Solonker suture zone, accompanied by possible slab break-off and lithospheric delamination during the Latest Permian to Middle Triassic. The resultant orogen in the Late Triassic underwent exhumation and denudation of rocks in response to the postorogenic collapse and regional extension. Vertical crustal growth in the Triassic is documented by detrital zircons from the Xingfuzhilu Formation and appears to have been widespread across entire eastern CAOB.
学科主题	构造地质学
WOS关键词	ASIAN OROGENIC BELT ; U-PB AGES ; DETRITAL ZIRCON RECORD ; PHANEROZOIC CONTINENTAL GROWTH ; TURPAN-HAMI BASIN ; NORTH CHINA ; TECTONIC IMPLICATIONS ; NW CHINA ; SOUTHERN MONGOLIA ; VOLCANIC-ROCKS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000340248700004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40545]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China 2.Li, Shan; Wilde, Simon A.] Curtin Univ, Dept Appl Geol, Perth, WA 6845, Australia 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Li, Shan,Wilde, Simon A.,He, Zhengjun,et al. Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China[J]. TECTONICS,2014,33(6):960-981.
APA	Li, Shan,Wilde, Simon A.,He, Zhengjun,Jiang, Xiaojun,Liu, Renyan,&Zhao, Lei.(2014).Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China.TECTONICS,33(6),960-981.
MLA	Li, Shan,et al."Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China".TECTONICS 33.6(2014):960-981.