Ca. 2.9 Ga granitoid magmatism in eastern Shandong, North China Craton: Zircon dating, Hf-in-zircon isotopic analysis and whole-rock geochemistry

doi:10.1016/j.precamres.2014.09.006

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	Ca. 2.9 Ga granitoid magmatism in eastern Shandong, North China Craton: Zircon dating, Hf-in-zircon isotopic analysis and whole-rock geochemistry
	Xie, Shiwen 5; Xie, Hangqiang ; Wang, Shijin 1; Kroener, Alfred ; Liu, Shoujie ; Zhou, Hongying 2; Ma, Mingzhu ; Dong, Chunyan ; Liu, Dunyi ; Wan, Yusheng 3
刊名	PRECAMBRIAN RESEARCH
	2014
卷号	255 页码:538-562
关键词	Mesoarchean TTG Juvenile crustal addition Eastern Shandong Zircon dating Hf isotope
ISSN号	0301-9268
DOI	10.1016/j.precamres.2014.09.006
英文摘要	Eastern Shandong is one of the important early Precambrian areas in the North China Craton, where extensive 2.5, 2.7 and 2.9 Ga magmatic activities have been identified, followed by very strong late Neoarchean and Paleoproterozoic tectono-thermal events. We carried out SHRIMP zircon dating, Hf-in-zircon isotope analysis and a whole-rock geochemical study on ca. 2.9 Ga Mesoarchean magmatic rocks. These include gneissic diorite, gneissic quartz diorite, gneissic tonalite and gneissic high-Si trondhjemite and were identified in five new areas. All these rocks contain ca. 2.5 Ga metamorphic zircons. The dioritic and tonalitic rocks are enriched in large ion lithosphile (LIL) elements (K, Rb, Ba) and depleted in Nb and P with moderate to highly fractionated REE patterns, similar in chemical compositions to Archean TTG rocks worldwide. The high-Si trondhjemites are characterized by very high SiO2 and very low FeOt + MgO. The magmatic zircon grains from all these rocks are similar in their Hf isotopic compositions and have epsilon(Hf)(t) values ranging from +1.3 to +9.9. Combined with previous work, our main conclusions are: (1) eastern Shandong underwent a major magmatic event at ca. 2.9 Ga; (2) diorites and tonalites formed by melting of thickened lower crust or the root of an oceanic plateau, whereas the high-Si trondhjemites were derived from melting of intermediate to felsic rocks; (3) the Mesoarchean (ca. 2.9 Ga) was a major period ofjuvenile crustal addition from the depleted mantle, earlier than the major crustal growth period at 2.7-2.8 Ga in the North China Craton; (4) the 2.7-2.9 Ga rocks underwent strong metamorphism at ca. 2.5 Ga, probably as a result of magmatic underplating. (C) 2014 Elsevier B.V. All rights reserved.
学科主题	地质年代学
WOS关键词	U-PB ZIRCON ; LIAO-JI BELT ; TRONDHJEMITE-GRANODIORITE TTG ; PRESSURE PELITIC GRANULITES ; CRUSTAL EVOLUTION ; JIAOBEI TERRANE ; T PATH ; LU-HF ; METAMORPHIC EVOLUTION ; TECTONIC IMPLICATIONS
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000348011600003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40516]
专题	中国地质调查局天津地质调查中心
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China 2.Shandong Geol Survey Inst, Jinan 250013, Peoples R China 3.China Geol Survey, Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China 4.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Xie, Shiwen,Xie, Hangqiang,Wang, Shijin,et al. Ca. 2.9 Ga granitoid magmatism in eastern Shandong, North China Craton: Zircon dating, Hf-in-zircon isotopic analysis and whole-rock geochemistry[J]. PRECAMBRIAN RESEARCH,2014,255:538-562.
APA	Xie, Shiwen.,Xie, Hangqiang.,Wang, Shijin.,Kroener, Alfred.,Liu, Shoujie.,...&Wan, Yusheng.(2014).Ca. 2.9 Ga granitoid magmatism in eastern Shandong, North China Craton: Zircon dating, Hf-in-zircon isotopic analysis and whole-rock geochemistry.PRECAMBRIAN RESEARCH,255,538-562.
MLA	Xie, Shiwen,et al."Ca. 2.9 Ga granitoid magmatism in eastern Shandong, North China Craton: Zircon dating, Hf-in-zircon isotopic analysis and whole-rock geochemistry".PRECAMBRIAN RESEARCH 255(2014):538-562.