The 1.35 Ga diabase sills from the northern North China Craton: Implications for breakup of the Columbia (Nuna) supercontinent

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	The 1.35 Ga diabase sills from the northern North China Craton: Implications for breakup of the Columbia (Nuna) supercontinent
	Zhang, SH (Zhang, Shuan-Hong); Zhao, Y (Zhao, Yue); Yang, ZY (Yang, Zhen-Yu); He, ZF (He, Zhe-Feng); Wu, H (Wu, Hai)
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2009
卷号	288 期号:3-4 页码:588-600
关键词	zircon baddeleyite mafic sill U-Pb geochronology continental breakup Mid-Mesoproterozoic (Ectasian) North China Craton (NCC) Columbia (Nuna) supercontinent
ISSN号	0012-821X
英文摘要	Diabase sills are widespread within the Mesoproterozoic marine clastic and carbonate platformal sedimentary rocks in the northern North China Craton (NCC). Our new LA-ICP-MS zircon and baddeleyite dating on a diabase sill sample emplaced into the Mesoproterozoic Wumishan Formation yielded weighed mean (207)Pb/(206)Pb ages of 1345 +/- 12 Ma (95% confidence, MSWD = 1.8, N = 18) and 1353 +/- 14 Ma (95% confidence, MSWD=0.67, N=15). respectively, indicating emplacement of the sills at the Mid-Mesoproterozoic (Ectasian) instead of the Late Paleozoic or Mesozoic as previously regarded. Existence of large volumes of 1.35 Ga diabase sills in the northern NCC indicates that the northern NCC underwent strong extension and mafic magmatism during Mid-Mesoproterozoic (Ectasian) time, probably related to the breakup of the Columbia (Nuna) supercontinent. Compared with the 1.4-1.3 Ga mafic dyke swarms (sills) in other cratons, we suggested that the NCC was a member of Nena including the Laurentia (North America and Greenland), Siberia and Baltica cratons in the supercontinent. The NCC was likely connected to the Siberia and North America (Laurentia) cratons during late Paleoproterozoic to Mid-Mesoproterozoic times, and breakup of the NCC away from the Columbia supercontinent occurred at around 1.35 Ga, which are consistent with the paleomagnetic results. The new zircon and baddeleyite geochronological results on the diabase sills provide not only magmatic evidence for Precambrian supercontinent reconstruction but also important constraint on ages of the Meso-Neoproterozoic strata in the NCC. (C) 2009 Elsevier B.V. All rights reserved.
学科主题	构造地质学
WOS关键词	U-PB AGES ; PALEO-MESOPROTEROZOIC SUPERCONTINENT ; LARGE IGNEOUS PROVINCES ; MAFIC DIKES ; DYKE SWARM ; PALEOPROTEROZOIC EVOLUTION ; GEOLOGICAL SIGNIFICANCE ; RODINIA SUPERCONTINENT ; TECTONIC IMPLICATIONS ; ZIRCON GEOCHRONOLOGY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000273150900025
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39073]
专题	中国地质调查局
作者单位	Minist Land & Resource, Geol Samples Ctr, Sanhe 065201, Peoples R China
推荐引用方式 GB/T 7714	Zhang, SH ,Zhao, Y ,Yang, ZY ,et al. The 1.35 Ga diabase sills from the northern North China Craton: Implications for breakup of the Columbia (Nuna) supercontinent[J]. EARTH AND PLANETARY SCIENCE LETTERS,2009,288(3-4):588-600.
APA	Zhang, SH ,Zhao, Y ,Yang, ZY ,He, ZF ,&Wu, H .(2009).The 1.35 Ga diabase sills from the northern North China Craton: Implications for breakup of the Columbia (Nuna) supercontinent.EARTH AND PLANETARY SCIENCE LETTERS,288(3-4),588-600.
MLA	Zhang, SH ,et al."The 1.35 Ga diabase sills from the northern North China Craton: Implications for breakup of the Columbia (Nuna) supercontinent".EARTH AND PLANETARY SCIENCE LETTERS 288.3-4(2009):588-600.