Magmatic response to the interplay of collisional and accretionary orogenies in the Korean Peninsula: Geochronological, geochemical, and O-Hf isotopic perspectives from Triassic plutons

doi:10.1130/B32021.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Magmatic response to the interplay of collisional and accretionary orogenies in the Korean Peninsula: Geochronological, geochemical, and O-Hf isotopic perspectives from Triassic plutons
	Cheong, Albert Chang-Sik 1; Jo, Hui Je 1; Jeong, Youn-Joong 1; Li, Xian-Hua 2
刊名	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
	2019-03-01
卷号	131 期号:3-4 页码:609-634
ISSN号	0016-7606
DOI	10.1130/B32021.1
英文摘要	Phanerozoic internal and peripheral orogens in Northeast Asia converge toward the Korean Peninsula situated between cratonic Asia and the outboard magmatic arc. Widespread Mesozoic plutons in the peninsula provide first-hand information about the magmatic response to the continental and oceanic plate subduction. The present study addresses this issue using comprehensive (n >1100) whole-rock geochemical, zircon U-Pb geochronological, and O-Hf isotopic data obtained from Triassic gabbro-pyroxenitemangerite-monzonite-syenite-granodioritegranite plutons in the central and southern parts of the peninsula. The intrusion of ca. 265-250 Ma calc-alkaline granitoids, including the high-silica adakite, along the outboard (in present coordinates) Yeongnam Massif is coeval with or slightly younger than the Barrovian metamorphism recognized in fold-and-thrust belts surrounding the inboard (northward, present coordinates) Gyeonggi Massif, suggesting a close link between the collisional orogenesis and subduction initiation as commonly documented in Phanerozoic supercontinents. Subsequent Late Triassic plutons emplaced in the Yeongnam Massif are subdivided into the older (232-224 Ma) magnesian and alkali-calcic to calc-alkalic group and the younger (220-217 Ma) ferroan and alkalic to alkali-calcic group temporally intervened by the geochemically arc-like Andong ultramafic complex (222 Ma). Zircon O-Hf isotopic compositions of the older plutons reflect the mixing of metasomatized lithospheric mantle, young (probably Paleozoic) arc crust, and Precambrian basement crust, whereas those of the younger plutons reflect input of the asthenospheric/lithospheric mantle and mafic lower crust. Meanwhile, the Late Triassic (233-224 Ma) potassic plutons in and around the Gyeonggi Massif represent post-collisional magmatism most likely induced by slab breakoff, which may also have been responsible for the shoshonitic magmatism in the Yeongnam Massif. Spatial differences in the age pattern and O-Hf isotopic signature of inherited and synmagmatic zircons from the potassic plutons indicate a selective contribution from an ancient metasomatized lithospheric mantle beneath the North China-like craton and an allochthonous South China-like lithosphere. The formation of the Triassic plutons could be explained by a series of tectonomagmatic events consisting sequentially of the ridge subduction, low-angle subduction, slab breakoff beneath the collisional orogen, tectonic switch to an extension-dominated arc system, and delamination of an overthickened arc lithosphere.
资助项目	Korea Basic Science Institute[C38709] ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT[2016R1A2B4007283]
WOS关键词	ZIRCON U-PB ; EARTH-ELEMENT MINERALIZATION ; SUBDUCTION-ZONE METAMORPHISM ; SONGRIM INDOSINIAN OROGENY ; ANDONG ULTRAMAFIC COMPLEX ; CENTRAL GYEONGGI MASSIF ; CENTRAL OKCHEON BELT ; A-TYPE GRANITES ; SOUTH-KOREA ; TECTONIC EVOLUTION
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000460031700014
资助机构	Korea Basic Science Institute ; Korea Basic Science Institute ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; Korea Basic Science Institute ; Korea Basic Science Institute ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; Korea Basic Science Institute ; Korea Basic Science Institute ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; Korea Basic Science Institute ; Korea Basic Science Institute ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT ; National Research Foundation of Korea - government of Korea's Ministry of Science and ICT
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90879]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Cheong, Albert Chang-Sik
作者单位	1.Korea Basic Sci Inst, Div Earth & Environm Sci, Chungcheongbukdo 28119, South Korea 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100027, Peoples R China
推荐引用方式 GB/T 7714	Cheong, Albert Chang-Sik,Jo, Hui Je,Jeong, Youn-Joong,et al. Magmatic response to the interplay of collisional and accretionary orogenies in the Korean Peninsula: Geochronological, geochemical, and O-Hf isotopic perspectives from Triassic plutons[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2019,131(3-4):609-634.
APA	Cheong, Albert Chang-Sik,Jo, Hui Je,Jeong, Youn-Joong,&Li, Xian-Hua.(2019).Magmatic response to the interplay of collisional and accretionary orogenies in the Korean Peninsula: Geochronological, geochemical, and O-Hf isotopic perspectives from Triassic plutons.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,131(3-4),609-634.
MLA	Cheong, Albert Chang-Sik,et al."Magmatic response to the interplay of collisional and accretionary orogenies in the Korean Peninsula: Geochronological, geochemical, and O-Hf isotopic perspectives from Triassic plutons".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 131.3-4(2019):609-634.