Late Neoarchean subduction-related crustal growth in the Northern   Liaoning region of the North China Craton: Evidence from similar to 2.55   to 2.50 Ga granitoid gneisses

doi:10.1016/j.precamres.2016.05.018

CORC > 北京大学 > 地球与空间科学学院

	Late Neoarchean subduction-related crustal growth in the Northern Liaoning region of the North China Craton: Evidence from similar to 2.55 to 2.50 Ga granitoid gneisses
	Wang, Wei ; Liu, Shuwen ; Cawood, Peter A. ; Bai, Xiang ; Guo, Rongrong ; Guo, Boran ; Wang, Kang
刊名	PRECAMBRIAN RESEARCH
	2016
关键词	Late Neoarchean granitoid gneisses Crustal growth Intra-oceanic arc and arc-continent accretion Northern Liaoning Province Northern margin of North China Craton ZIRCON U-PB ULTRAHIGH-TEMPERATURE METAMORPHISM TRONDHJEMITE-GRANODIORITE TTG PLASMA-MASS SPECTROMETRY HIGH-PRESSURE GRANULITES HF ISOTOPIC SYSTEMATICS EASTERN HEBEI PROVINCE LATE ARCHEAN MAGMATISM ISUA GREENSTONE-BELT BILLION YEARS AGO
DOI	10.1016/j.precamres.2016.05.018
英文摘要	The North China Craton (NCC), dominated by similar to 2.6-2.5 Ga tectonothermal events, provides a natural laboratory to study Neoarchean crustal growth and geodynamic evolution. Late Neoarchean granitoid gneisses are well exposed in the Northern Liaoning Province, located north of the ancient Anshan-Benxi terrane along the northeastern margin of the Eastern Block (EB) of the NCC. LA-ICPMS zircon U-Pb isotopic data reveal that granitoid gneisses in the Qingyuan area can be grouped into two major episodes, i.e., similar to 2559-2534 Ma strongly gneissic quartz dioritic and tonalitic to trondhjemitic gneisses; and similar to 2529-2495 Ma weakly gneissic to massive quartz monzodioritic and monzogranitic gneisses, with subordinate tonalitic to trondhjemitic gneisses. The late magmatic episode was accompanied by regionally high-grade metamorphism (similar to 2510-2495 Ma). Most granitoid gneisses display highly depleted zircon epsilon Hf(t(2)) values (+4.2 to +8.1), whereas one monzogranitic gneiss shows negative values of -4.7 to -1.0, indicating late Neoarchean crustal growth with minor involvement of ancient continental materials probably sourced from the Anshan-Benxi terrane. Geochemical and petrogenetic studies reveal that the quartz dioritic magmas were derived from partial melting of plagioclase-poor garnet amphibolites or eclogites metamorphosed from oceanic slab materials, with slab melts contaminated by mantle wedge peridotites during ascent. The tonalitic to trondhjemitic magmas stemmed from partial melting of mainly juvenile metabasaltic rocks with minor metagreywackes of lower arc crust. In comparison, the quartz monzodioritic and monzogranitic magmas were derived respectively from partial melting of depleted mantle sources metasomatized by slab derived fluids and metagreywackes with different crustal resident ages at middle to lower crustal levels. Combined with previous studies of supracrustal metavolcanic rocks, the Northern Liaoning Province records late Neoarchean crustal growth, evolving from mid-ocean ridge, through initiation and maturation of an intra-oceanic arc, to arc-continent collision. Arc-continent accretion and possibly slab rollback processes may have triggered reworking of both juvenile arc crust and minor ancient continental margin materials, generating the magmatic precursors for the monzogranitic gneisses. Overall, the intense late Neoarchean crustal growth of the EB was controlled mainly by arc-continent accretion, possibly linked to global assembly of cratonic fragments. (C) 2016 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [41272209, 41472165, 41502179, 41530207]; Central University Basic Scientific Research Business Expenses of China University of Geosciences (Beijing) [2652015038]; SCI(E); ARTICLE; swliu@pku.edu.cn; 200-223; 281
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/491704]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Wei,Liu, Shuwen,Cawood, Peter A.,et al. Late Neoarchean subduction-related crustal growth in the Northern Liaoning region of the North China Craton: Evidence from similar to 2.55 to 2.50 Ga granitoid gneisses[J]. PRECAMBRIAN RESEARCH,2016.
APA	Wang, Wei.,Liu, Shuwen.,Cawood, Peter A..,Bai, Xiang.,Guo, Rongrong.,...&Wang, Kang.(2016).Late Neoarchean subduction-related crustal growth in the Northern Liaoning region of the North China Craton: Evidence from similar to 2.55 to 2.50 Ga granitoid gneisses.PRECAMBRIAN RESEARCH.
MLA	Wang, Wei,et al."Late Neoarchean subduction-related crustal growth in the Northern Liaoning region of the North China Craton: Evidence from similar to 2.55 to 2.50 Ga granitoid gneisses".PRECAMBRIAN RESEARCH (2016).