A rift system in southeastern Central Asian Orogenic Belt: Constraint   from sedimentological, geochronological and geochemical investigations   of the Late Carboniferous-Early Permian strata in northern Inner   Mongolia (China)

doi:10.1016/j.gr.2016.06.013

CORC > 北京大学 > 地球与空间科学学院

	A rift system in southeastern Central Asian Orogenic Belt: Constraint from sedimentological, geochronological and geochemical investigations of the Late Carboniferous-Early Permian strata in northern Inner Mongolia (China)
	Zhao, Pan ; Xu, Bei ; Zhang, Chenhao
刊名	GONDWANA RESEARCH
	2017
关键词	Paleo-Asian Ocean Central Asian Orogenic Belt Northern Inner Mongolia Late Carboniferous-Early Permian Rift Detrital zircon U-PB AGES DETRITAL ZIRCON GEOCHRONOLOGY PALEOZOIC TECTONIC EVOLUTION A-TYPE GRANITOIDS SOUTHERN MONGOLIA CONTINENTAL GROWTH VOLCANIC-ROCKS CRUSTAL GROWTH GEOLOGICAL SIGNIFICANCE NORTHEASTERN CHINA
DOI	10.1016/j.gr.2016.06.013
英文摘要	The Late Carboniferous-Early Permian is themost controversial period for the tectonic evolution of the southeastern Central Asian Orogenic Belt (CAOB). In this study, we performed sedimentological and detrital zircon dating on the clastic sediments, as well as zircon U-Pb age and geochemical analysis on the rhyolitic rocks of the Late Carboniferous-Early Permian strata from northern Inner Mongolia (China). The sedimentological analysis showed that the Late Carboniferous-Early Permian sediments are composed of continental clastic and volcanic rocks with basal conglomerate overlying the Devonian strata. The detrital zircon study revealed three age peaks at similar to 300 Ma, similar to 440 Ma and similar to 530 Ma, indicating that the clastic rocks derived from Paleozoic magmatic rocks and pre-Carboniferous sediments from northern Inner Mongolia. The age data revealed that rhyolitic rocks from northern Inner Mongolia extruded in two stages at Late Carboniferous and latest Carboniferous-Early Permian. The Late Carboniferous rhyolites show I-to A-type granitic affinities whereas the latest Carboniferous-Early Permian rhyolites have A-type granitic characteristics. The difference suggests a transition of tectonic setting from post-collisional extension to intraplate rift. The Late Carboniferous-Early Permian strata from northern Inner Mongolia and South Mongolia show similar sedimentary facies, detrital zircon age distribution and geochemistry features, hence theywere probably deposited in the same tectonic setting. A unified block was finally proposed in northern Inner Mongolia and South Mongolia, where a rift system provided an intra-continental sedimentary basin and induced intense syn-rift magmatic activities. The intra-continental basin and syn-rift magmatism indicate that the Xing'an-Airgin Sum, Songliao-Hunshandake and South Mongolia Blocks in southeastern CAOB have been welded into a single continental block before the Late Carboniferous. (C) 2016 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.; National Key Basic Research Program of China [2013CB429806]; National Science Foundation of China [40872145, 41121062]; SCI(E); ARTICLE; ,SI; 342-357; 47
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472588]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhao, Pan,Xu, Bei,Zhang, Chenhao. A rift system in southeastern Central Asian Orogenic Belt: Constraint from sedimentological, geochronological and geochemical investigations of the Late Carboniferous-Early Permian strata in northern Inner Mongolia (China)[J]. GONDWANA RESEARCH,2017.
APA	Zhao, Pan,Xu, Bei,&Zhang, Chenhao.(2017).A rift system in southeastern Central Asian Orogenic Belt: Constraint from sedimentological, geochronological and geochemical investigations of the Late Carboniferous-Early Permian strata in northern Inner Mongolia (China).GONDWANA RESEARCH.
MLA	Zhao, Pan,et al."A rift system in southeastern Central Asian Orogenic Belt: Constraint from sedimentological, geochronological and geochemical investigations of the Late Carboniferous-Early Permian strata in northern Inner Mongolia (China)".GONDWANA RESEARCH (2017).