Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean

	Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean
	Li Yu 1; Ding LeiLei 2; Xu Wenliang 1; Wang Feng 1; Tang Jie 1; Zhao Shuo 1; Wang ZiJin 1
刊名	ACTA PETROLOGICA SINICA
	2015
卷号	31 期号:1 页码:56-66
关键词	Sunwu area Middle Jurassic Muscovite granite Geochronology Geochemistry Closure timing of the Mongol-Okhotsk Ocean
ISSN号	1000-0569
文献子类	Article
英文摘要	Zircon U-Pb dating and whole-rock geochemical analyses are undertaken for the muscovite granite in Sunwu area, NE China, with the aim of constraining its formation time, petrogenesis and the regional tectonic setting. Zircons from the muscovite granite in the study area are euhedral-subhedral in shape, and display fine-scale oscillatory growth zoning, indicating a magmatic origin. LA-ICP-MS zircon U-Pb dating indicates that the muscovite granite formed in the Middle Jurassic (similar to 168Ma). The muscovite granites have SiO2 = 74.61% similar to 80.16%, Al2O3 = 10.59% similar to 13.90%, Fe2O3 = 0.11% similar to 0.30%, and belong chemically to metaluminous-peraluminous series (A/CNK = 0.97 similar to 1.13). In addition, these muscovite granites are enriched in light rare earth elements (LREEs) and large ion lithophile elements (LILEs), and depleted in heavy rare earth elements (HREEs) and high field strength elements (HFSEs). The epsilon(Hf)(t) values and t(DM2) of zircons range from + 7.53 to + 11.66 and from 595Ma to 966Ma, respectively, indicating that the primary magma was derived from partial melting of a juvenile thickened lower crust. Combined with the metamorphic complexes in the conjunction of the Great and Lesser Xing' an Ranges and the regional stratigraphic unconformity in western Liaoning and northern Hebei provinces, it is suggested that a significant collisional and thrusting event took place during Middle Jurassic, implying the closure of the Mongol-Okhotsk Ocean. Taken together, we conclude that the muscovite granite in the study area formed in a compressing collisional setting, which is related to the closure of the Mongol-Okhotsk Ocean instead of the subduction of the Paleo-Pacific oceanic plate beneath the Eurasian continent.
WOS关键词	MESOZOIC VOLCANIC-ROCKS ; GREAT XINGAN RANGE ; U-PB GEOCHRONOLOGY ; EASTERN HEILONGJIANG PROVINCE ; HF ISOTOPIC COMPOSITIONS ; ASIAN OROGENIC BELT ; LA-ICP-MS ; NORTH CHINA ; TECTONIC IMPLICATIONS ; ZHANGGUANGCAI RANGE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000349509300004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/86860]
专题	中国科学院地质与地球物理研究所
通讯作者	Li Yu
作者单位	1.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li Yu,Ding LeiLei,Xu Wenliang,et al. Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean[J]. ACTA PETROLOGICA SINICA,2015,31(1):56-66.
APA	Li Yu.,Ding LeiLei.,Xu Wenliang.,Wang Feng.,Tang Jie.,...&Wang ZiJin.(2015).Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean.ACTA PETROLOGICA SINICA,31(1),56-66.
MLA	Li Yu,et al."Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean".ACTA PETROLOGICA SINICA 31.1(2015):56-66.