U-Pb zircon, geochemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I- and A-type granites from central Guangdong, SE China: A major igneous event in response to foundering of a subducted flat-slab?

doi:10.1016/j.lithos.2006.09.018

	U-Pb zircon, geochemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I- and A-type granites from central Guangdong, SE China: A major igneous event in response to foundering of a subducted flat-slab?
	Li, Xian-Hua ; Li, Zheng-Xiang ; Li, Wu-Xian ; Liu, Ying ; Yuan, Chao ; Wei, Gangjian ; Qi, Changshi
刊名	LITHOS
	2007-06-01
卷号	96 期号:1-2 页码:186-204
关键词	granites U-Pb zircon age geochemistry Sr-Nd-Hf isotopes Jurassic lithosphere foundering SE China
ISSN号	0024-4937
DOI	10.1016/j.lithos.2006.09.018
文献子类	Article
英文摘要	The Mesozoic geology of SE China is characterized by widespread Jurassic to Cretaceous igneous rocks consisting predominantly of granites and rhyolites and subordinate mafic lithologies. However, the tectonic regime responsible for the inland Jurassic granites remains controversial. We report here U-Pb zircon ages, geochemical and Sr-Nd-Hf isotopic data for the Nankunshan alkaline granite and the Fogang granitic batholith in central Guangdong. Mineralogical and geochemical features suggest that the Fogang and Nankunshan rocks are I- and aluminous A-type granites, respectively. SHRIMP U-Pb zircon analyses yield consistent ages ranging from 159 +/- 3 Ma to 165 +/- 2 Ma for four samples from the Fogang Batholith, and an age of 158 +/- 5 Ma for the Nankunshan Granite. The Fogang granites, having I-Sr = 0.7098-0.7136, epsilon Nd(T) = -4.3 to -12.2 and epsilon Hf(T) = -11.5 to -3.1 for the magmatic zircons, were derived from Paleoproterozoic mafic-intermediate igneous protolith with minor addition of mantle-derived magmas. The Nankunshan rocks have relatively lower I-Sr approximate to 0.706-0.708, higher epsilon Nd(T)=0.3 to -2.4 and epsilon Hf(T)= -5.7 to 1.1 for the magmatic zircons, and some OIB-like trace element ratios. They were likely generated through extensive fractional crystallization of mantle-derived alkaline parental magma associated with crustal assimilation. These similar to 160 Ma I- and A-type granites in central Guangdong were emplaced coeval with the widespread 165-155 Ma I- and A-type granites and syenites following the initiation of intraplate basaltic and/or bimodal igneous magmatism at 180-170 Main the adjacent regions. We interpret these Jurassic igneous rocks as anorogenic magmatism formed during a major igneous event in response to foundering of an early Mesozoic subducted flat-slab beneath SE China continent. (C) 2006 Elsevier B.V All rights reserved.
WOS关键词	SOUTHERN JIANGXI PROVINCE ; SOUTHEASTERN AUSTRALIA ; TECTONIC IMPLICATIONS ; HONG-KONG ; PETROGENESIS ; GEOCHRONOLOGY ; ROCKS ; CRUST ; MAGMATISM ; EVOLUTION
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000247167300012
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/68494]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Xian-Hua
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Univ Western Australia, Sch Earth & Geog Sci, Tecton Special Res Ctr, Crawley, WA 6009, Australia
推荐引用方式 GB/T 7714	Li, Xian-Hua,Li, Zheng-Xiang,Li, Wu-Xian,et al. U-Pb zircon, geochemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I- and A-type granites from central Guangdong, SE China: A major igneous event in response to foundering of a subducted flat-slab?[J]. LITHOS,2007,96(1-2):186-204.
APA	Li, Xian-Hua.,Li, Zheng-Xiang.,Li, Wu-Xian.,Liu, Ying.,Yuan, Chao.,...&Qi, Changshi.(2007).U-Pb zircon, geochemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I- and A-type granites from central Guangdong, SE China: A major igneous event in response to foundering of a subducted flat-slab?.LITHOS,96(1-2),186-204.
MLA	Li, Xian-Hua,et al."U-Pb zircon, geochemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I- and A-type granites from central Guangdong, SE China: A major igneous event in response to foundering of a subducted flat-slab?".LITHOS 96.1-2(2007):186-204.