similar to 2.7 Ga juvenile crust formation in the North China Craton (Taishan-Xintai area, western Shandong Province) Further evidence of an understated event from U-Pb dating and Hf isotopic composition of zircon

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	similar to 2.7 Ga juvenile crust formation in the North China Craton (Taishan-Xintai area, western Shandong Province) Further evidence of an understated event from U-Pb dating and Hf isotopic composition of zircon
	Wan, YS (Wan, Yusheng); Liu, DY (Liu, Dunyi); Wang, SJ (Wang, Shijin); Yang, EX (Yang, Enxiu); Wang, W (Wang, Wei); Dong, CY (Dong, Chunyan); Zhou, HY (Zhou, Hongyin); Du, LL (Du, Linli); Yang, YH (Yang, Yueheng); Diwu, CR (Diwu, Chunrong)
刊名	PRECAMBRIAN RESEARCH
	2011
卷号	186 期号:1-4 页码:169-180
关键词	Neoarchean Supracrustal rocks TTG rocks SHRIMP U-Pb dating Hf isotope Western Shandong province North China Craton
ISSN号	0301-9268
英文摘要	The evolution of the North China Craton (NCC) is well known for a marked 2.55-2.50 Ga tectonothermal event. However, supracrustal and intrusive rocks of 2.75-270 Ga are in fact widely distributed in the western Shandong Province, the most important area of Archaean basement in the eastern part of the NCC. This paper reports SHRIMP U-Pb dating and LA-ICF MS Hf isotopic composition of zircons from 2.75-2.70 Ga supracrustal and trondhjemite-tonalite-granodiorite (TTG) rocks in that area. Three fine-grained (hornblende) biotite gneiss samples (known locally as leptynite, with meta-volcanic or volcanosedimentary rock protoliths) and five TTG samples have SHRIMP zircon U-Pb ages varying from 2.75 to 2.70 Ga and 2.74 to 2.71 Ga, respectively. Zircons from most a the samples have high positive epsilon(Hf(t)) values (+4.7 to +10.0) and t(DM)(Hf) ages (2.85-2.60 Ga) similar to their zircon U-Pb ages. This indicates that the rocks represent largely juvenile crustal additions derived from depleted mantle only a short time before. However, some granitoids show epsilon(HF)(t) zircon values of -13.6 to +5.1 and t(DM)(Hf) of 3.51-2.80 Ga. Therefore, the strong 2.75-2.70 Ga tectonothermal event in tht western Shandong Province involved not only juvenile addition to the continental crust but also introcrustal recycling of older components. Combined with craton-wide data, it is shown that the NCC is similar to many other cratons around the world where tectonothermal events of similar to 2.7 Ga are well developed. However, the main difference is that in the NCC, superimposed similar to 2.5 Ga tectonothermal events were much stronger than in most other cratons. (C) 2011 Elsevier B.V. All rights reserved.
学科主题	地质年代学
WOS关键词	SUPERIOR PROVINCE ; GREENSTONE-BELT ; HENAN PROVINCE ; BALTIC SHIELD ; GEOCHRONOLOGICAL CONSTRAINTS ; AGE CONSTRAINTS ; VOLCANIC-ROCKS ; FUPING COMPLEX ; SOUTHERN INDIA ; ION MICROPROBE
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000289449500010
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39371]
专题	中国地质调查局
作者单位	NW Univ Xian, Dept Geol, Xian 710069, Peoples R China
推荐引用方式 GB/T 7714	Wan, YS ,Liu, DY ,Wang, SJ ,et al. similar to 2.7 Ga juvenile crust formation in the North China Craton (Taishan-Xintai area, western Shandong Province) Further evidence of an understated event from U-Pb dating and Hf isotopic composition of zircon[J]. PRECAMBRIAN RESEARCH,2011,186(1-4):169-180.
APA	Wan, YS .,Liu, DY .,Wang, SJ .,Yang, EX .,Wang, W .,...&Diwu, CR .(2011).similar to 2.7 Ga juvenile crust formation in the North China Craton (Taishan-Xintai area, western Shandong Province) Further evidence of an understated event from U-Pb dating and Hf isotopic composition of zircon.PRECAMBRIAN RESEARCH,186(1-4),169-180.
MLA	Wan, YS ,et al."similar to 2.7 Ga juvenile crust formation in the North China Craton (Taishan-Xintai area, western Shandong Province) Further evidence of an understated event from U-Pb dating and Hf isotopic composition of zircon".PRECAMBRIAN RESEARCH 186.1-4(2011):169-180.