Nature and timing of the Solonker suture of the Central Asian Orogenic Belt: insights from geochronology and geochemistry of basic intrusions in the Xilin Gol Complex, Inner Mongolia, China

doi:10.1007/s00531-013-0931-3

	Nature and timing of the Solonker suture of the Central Asian Orogenic Belt: insights from geochronology and geochemistry of basic intrusions in the Xilin Gol Complex, Inner Mongolia, China
	Li, Yilong 1,2,3; Zhou, Hanwen 1,3; Brouwer, Fraukje M.2; Xiao, Wenjiao 4; Wijbrans, Jan R.2; Zhao, Junhong 1,3; Zhong, Zengqiu 1,3; Liu, Huifang 3
刊名	INTERNATIONAL JOURNAL OF EARTH SCIENCES
	2014
卷号	103 期号:1 页码:41-60
关键词	LA-ICPMS Ar-40/Ar-39 Geochemistry Basic intrusion Xilin Gol Complex Central Asian Orogenic Belt
ISSN号	1437-3254
DOI	10.1007/s00531-013-0931-3
文献子类	Article
英文摘要	The Solonker suture zone of the Central Asian Orogenic Belt (CAOB) records the final closure of the Paleo-Asian Ocean. The nature and timing of final collision along the Solonker suture has long been controversial, partly because of an incomplete record of isotopic ages and differing interpretations of the geological environments of key tectonic units. The Xilin Gol Complex, consisting of strongly deformed gneisses, schists and amphibolites, is such a key tectonic unit within the CAOB. Lenticular or quasi-lamellar amphibolites are dispersed throughout the complex, intercalated with biotite-plagioclase gneiss. Both rock types experienced amphibolite-facies metamorphism. The protolith of the amphibolite is a basic rock that intruded into the biotite-plagioclase gneiss at 319 +/- A 4 Ma based on LA-ICPMS zircon U-Pb dating. The basic intrusion was sourced from a modified magma that experienced crystal fractionation and was admixed with slab-derived fluids. The slab-derived fluids, which formed during Early Paleozoic oceanic subduction along the north-dipping Sonidzuoqi-Xilinhot subduction zone, mixed with the magma source and produced subduction-related geochemical signatures superimposed on volcanic arc chemistry. After Early Paleozoic oceanic subduction and arc-continent collision, a transient stage of extension occurred between 313 and 280 Ma in the Sonidzuoqi-Xilinhot area. Deformation and recrystallization during the switch from compression to extension and reheating by the later magmatic intrusions reset the isotope systems of minerals in the Xilin Gol Complex, recorded by a 312.2 +/- A 1.5 Ma biotite Ar-40/Ar-39 age from biotite-plagioclase gneiss, a 309 +/- A 12 Ma zircon intercept age and a 307.5 +/- A 3.5 Ma hornblende Ar-40/Ar-39 age from amphibolites in the complex. There was an arc/forearc-related marine basin at the southern margin of the Xilin Gol Complex during the Permian. The closure of the oceanic basin led to Late Paleozoic-Middle Triassic north-dipping subduction beneath the Xilin Gol Complex and induced the amphibolite-facies metamorphism of the complex. The final suturing of the Solonker zone occurred from 269 to 231 Ma. This latest amphibolite-facies metamorphism with pressures of 0.31-0.39 GPa and temperatures of 620-660 A degrees C was recorded at 263.4 +/- A 1.4 Ma to the Xilin Gol Complex, as indicated by the hornblende Ar-40/Ar-39 age from the amphibolites, as well as several zircon ages of 260 +/- A 3-231 +/- A 3 Ma. The Xilin Gol Complex documented the progressive accretion of a single, long-lived subduction system at the southern margin of the south Mongolian microcontinent from the Early Paleozoic (similar to 452 Ma) to Middle Triassic (similar to 231 Ma). The CAOB shows protracted collision prior to final suturing.
WOS关键词	PHANEROZOIC CONTINENTAL GROWTH ; CARBONIFEROUS VOLCANIC-ROCKS ; U-PB AGES ; CRUSTAL GROWTH ; NORTH CHINA ; TECTONIC EVOLUTION ; WESTERN TIANSHAN ; TRACE-ELEMENT ; CALC-ALKALINE ; FOLD BELT
WOS研究方向	Geology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000331106800005
资助机构	National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41230207 ; 41230207 ; 40725009 ; 40725009 ; 41190072 ; 41190072 ; 41190070 ; 41190070 ; 41190071 ; 41190071 ; 41202150) ; 41202150) ; National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41230207 ; 41230207 ; 40725009 ; 40725009 ; 41190072 ; 41190072 ; 41190070 ; 41190070 ; 41190071 ; 41190071 ; 41202150) ; 41202150) ; National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41230207 ; 41230207 ; 40725009 ; 40725009 ; 41190072 ; 41190072 ; 41190070 ; 41190070 ; 41190071 ; 41190071 ; 41202150) ; 41202150) ; National Natural Science Foundation of China(41202038 ; National Natural Science Foundation of China(41202038 ; Chinese National Basic Research Program 973(2007CB411307) ; Chinese National Basic Research Program 973(2007CB411307) ; China Bureau of Geological Investigation(1212010510507) ; China Bureau of Geological Investigation(1212010510507) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41230207 ; 41230207 ; 40725009 ; 40725009 ; 41190072 ; 41190072 ; 41190070 ; 41190070 ; 41190071 ; 41190071 ; 41202150) ; 41202150)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85728]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Yilong
作者单位	1.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 2.Vrije Univ Amsterdam, Dept Earth Sci, NL-1081 HV Amsterdam, Netherlands 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li, Yilong,Zhou, Hanwen,Brouwer, Fraukje M.,et al. Nature and timing of the Solonker suture of the Central Asian Orogenic Belt: insights from geochronology and geochemistry of basic intrusions in the Xilin Gol Complex, Inner Mongolia, China[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2014,103(1):41-60.
APA	Li, Yilong.,Zhou, Hanwen.,Brouwer, Fraukje M..,Xiao, Wenjiao.,Wijbrans, Jan R..,...&Liu, Huifang.(2014).Nature and timing of the Solonker suture of the Central Asian Orogenic Belt: insights from geochronology and geochemistry of basic intrusions in the Xilin Gol Complex, Inner Mongolia, China.INTERNATIONAL JOURNAL OF EARTH SCIENCES,103(1),41-60.
MLA	Li, Yilong,et al."Nature and timing of the Solonker suture of the Central Asian Orogenic Belt: insights from geochronology and geochemistry of basic intrusions in the Xilin Gol Complex, Inner Mongolia, China".INTERNATIONAL JOURNAL OF EARTH SCIENCES 103.1(2014):41-60.