U-Pb age and Hf isotope study of detrital zircons from the Wanzi supracrustals: Constraints on the tectonic setting and evolution of the Fuping Complex, Trans-North China Orogen

	U-Pb age and Hf isotope study of detrital zircons from the Wanzi supracrustals: Constraints on the tectonic setting and evolution of the Fuping Complex, Trans-North China Orogen
	Xia, Xiaoping ; Sun, Min ; Zhao, Guochun ; Wu Fuyuan ; Xu Ping ; Zhang, Jian ; He, Yanhong ; Zhang Jiheng
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2006-12-01
卷号	80 期号:6 页码:844-863
关键词	detrital zircons U-Pb age and Hf isotope Fuping Complex North China Craton
ISSN号	1000-9515
文献子类	Review
英文摘要	Located in the middle segment of the Trans-North China Orogen, the Fuping Complex is considered as a critical area in understanding the evolution history of the North China Craton (NCC). The complex is composed of various high-grade and multiply deformed rocks, including gray gneiss, basic granulite, amphibolite, fine-grained gneiss and marble, metamorphosed to upper amphibolite or granulite facies. It can be divided into four rock units: the Fuping TTG gneisses, Longquanguan augen gneisses, Wanzi supracrustals, and Nanying granitic gneisses. U-Pb age and Hf isotope compositions of about 200 detrital zircons from the Wanzi supracrustals of the Fuping Complex have been analyzed. The data on metamorphic zircon rims give ages of 1.82-1.84 Ga, corresponding to the final amalgamation event of the NCC, whereas the data for igneous zircon cores yield two age populations at similar to 2.10 and similar to 2.51 Ga, with some inherited ages scattering between 2.5 and 2.9 Ga. These results suggest that the Wanzi supracrustals were derived from the Fuping TTG gneisses (similar to 2.5 Ga) and the Nanying granitic gneisses (2.0-2.1 Ga) and deposited between 2.10 and 1.84 Ga. All zircons with similar to 2.51 Ga age have positive initial epsilon(Hf) values from +1.4 to +10.9, suggesting an important crustal growth event at similar to 2.5 Ga through the addition of juvenile materials from the mantle. The Hf isotope data for the detrital zircons further imply that the 2.8 Ga rocks are important components in the lower crust, which is consistent with a suggestion from Nd isotope data for the Eastern Block. The zircons of 2.10 Ga population have initial epsilon(Hf) values of -4.9 to +6.1, interpreted as mixing of crustal re-melt with minor juvenile material contribution at 2.1 Ga. These results are distinct from that for the Western Block, supporting that the Fuping Complex was emplaced in a tectonic active environment at the western margin of the Eastern Block.
WOS关键词	HIGH-PRESSURE GRANULITES ; LOWER CRUSTAL SECTION ; CENTRAL ZONE ; MAFIC GRANULITES ; BASEMENT ROCKS ; SANGGAN AREA ; SM-ND ; MESOPROTEROZOIC SUPERCONTINENT ; GEOCHRONOLOGICAL CONSTRAINTS ; PALEOPROTEROZOIC EVOLUTION
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000243309100006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/66376]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, Min
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Xia, Xiaoping,Sun, Min,Zhao, Guochun,et al. U-Pb age and Hf isotope study of detrital zircons from the Wanzi supracrustals: Constraints on the tectonic setting and evolution of the Fuping Complex, Trans-North China Orogen[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2006,80(6):844-863.
APA	Xia, Xiaoping.,Sun, Min.,Zhao, Guochun.,Wu Fuyuan.,Xu Ping.,...&Zhang Jiheng.(2006).U-Pb age and Hf isotope study of detrital zircons from the Wanzi supracrustals: Constraints on the tectonic setting and evolution of the Fuping Complex, Trans-North China Orogen.ACTA GEOLOGICA SINICA-ENGLISH EDITION,80(6),844-863.
MLA	Xia, Xiaoping,et al."U-Pb age and Hf isotope study of detrital zircons from the Wanzi supracrustals: Constraints on the tectonic setting and evolution of the Fuping Complex, Trans-North China Orogen".ACTA GEOLOGICA SINICA-ENGLISH EDITION 80.6(2006):844-863.