Ca. 1318 Ma A-type granite on the northern margin of the North China Craton Implications for intraplate extension of the Columbia supercontinent

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	Ca. 1318 Ma A-type granite on the northern margin of the North China Craton Implications for intraplate extension of the Columbia supercontinent
	Shi, YR (Shi, Yuruo); Liu, DY (Liu, Dunyi); Kroner, A (Kroener, Alfred); Jian, P (Jian, Ping); Miao, LC (Miao, Laicheng); Zhang, FQ (Zhang, Fuqin)
刊名	LITHOS
	2012
卷号	148 页码:1-9
关键词	Mesoproterozoic A-type granite North China Craton Intraplate extension Columbia supercontinent
ISSN号	0024-4937
英文摘要	Identification of the Mesoproterozoic A-type Jining granite and granite porphyry, which with abundant coeval mafic dike sills and volcanic rocks on the northern margin of the Precambrian North China Craton (NCC), may suggest intraplate extension of Columbia supercontinent. Major and trace elements of the Jining granite show an affinity to A-type granites, and may reflect an intraplate rift setting (A(1)-type granite). High Rb, Y, Yb, and Ta contents also show features of within-plate granites. SHRIMP zircon dating yielded concordant weighted mean Pb-207/Pb-206 ages of 1318 +/- 7 Ma and 1321 +/- 15 Ma, which define a Mesoproterozoic magmatic event. The zircons have negative epsilon(Hf(1))of -3.6 to -8.6 and corresponding old T-DM2 of 2330-2609 Ma (mean 2436 Ma), suggesting the involvement of a crustal source in the magma genesis. The Hf-in-zircon isotopic compositions are aligned along an evolution line for the average continental crust. These results suggest that the granite and granite porphyry originated from partial melting of an Archean crustal source in a within-plate anorogenic setting during the Mesoproterozoic. The discovery of this A-type granite and granite porphyry with coeval mafic sills suggests that the NCC was involved in the fragmentation of the Columbia supercontinent, and the intraplate extension of the supercontinent occurred during Mesoproterozoic, probably at ca. 1318 Ma. 2012 Elsevier B.V. All rights reserved.
学科主题	构造地质学
WOS关键词	U-PB AGES ; HF ISOTOPE COMPOSITION ; DYKE SWARM ; ANORTHOSITE COMPLEX ; TRACE-ELEMENT ; MAFIC DIKES ; LU-HF ; PALEOPROTEROZOIC SUPERCONTINENT ; MESOPROTEROZOIC SUPERCONTINENT ; GEOLOGICAL SIGNIFICANCE
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000308055800001
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39731]
专题	中国地质调查局
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Shi, YR ,Liu, DY ,Kroner, A ,et al. Ca. 1318 Ma A-type granite on the northern margin of the North China Craton Implications for intraplate extension of the Columbia supercontinent[J]. LITHOS,2012,148:1-9.
APA	Shi, YR ,Liu, DY ,Kroner, A ,Jian, P ,Miao, LC ,&Zhang, FQ .(2012).Ca. 1318 Ma A-type granite on the northern margin of the North China Craton Implications for intraplate extension of the Columbia supercontinent.LITHOS,148,1-9.
MLA	Shi, YR ,et al."Ca. 1318 Ma A-type granite on the northern margin of the North China Craton Implications for intraplate extension of the Columbia supercontinent".LITHOS 148(2012):1-9.