Zircon U-Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province, China

doi:10.1016/j.lithos.2012.03.020

	Zircon U-Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province, China
	Wu, Fu-Yuan; Ji, Wei-Qiang; Sun, Da-Hai; Yang, Yue-Heng; Li, Xian-Hua
刊名	LITHOS
	2012-10-01
卷号	150 页码:6-25
关键词	Zircon U-Pb geochronology Hf isotope Mesozoic granites South Anhui, China
ISSN号	0024-4937
DOI	10.1016/j.lithos.2012.03.020
文献子类	Article
英文摘要	Mesozoic magmatism is extensively developed in eastern China along the eastern Asian continental margin, but the geochronological framework is not well understood for each area. In this study, seventy-eight samples were collected from the Mesozoic igneous rocks in south Anhui Province, east-central China, in order to precisely constrain their formation ages and contributions to crustal growth. Zircon U-Pb age determination using ion probe and laser ablation techniques indicate that magmatism in the area can be divided into two separate stages: at 150-136 and 136-120 Ma, respectively. The first stage of granitic rocks, not documented in other areas of eastern China, is mostly composed of hornblende-bearing l-type granodiorite and monzogranite, and is considered to be formed by slab-tearing during Pacific subduction. The second stage of magmatism, coeval to that in other areas of eastern China, is characterized by the occurrence of A-type granite and syenite, and their volcanic counterparts, although l-type granitic rocks are also developed locally. These rocks are mostly distributed around and within the fault-controlled volcanic basins, and some are closely related to detachment shearing, indicating their formation in an extensional setting. Zircon Hf isotopic analyses indicate that Archean material might be present in the area, but that the main episode of crustal growth took place during the Mesoproterozoic, with very little juvenile material in the Mesozoic. (C) 2012 Elsevier B.V. All rights reserved.
WOS关键词	RIVER METALLOGENIC BELT ; EAST-CENTRAL CHINA ; A-TYPE GRANITE ; TEMPORAL-SPATIAL FRAMEWORK ; COPPER-GOLD MINERALIZATION ; ADAKITIC INTRUSIVE ROCKS ; MIDDLE-LOWER REACHES ; YANGTZE-RIVER ; VOLCANIC-ROCKS ; 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:000309616000002
资助机构	Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5) ; Chinese Academy of Sciences(KZCX2-YW-Q09-15-5)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84070]
专题	中国科学院地质与地球物理研究所
通讯作者	Wu, Fu-Yuan
作者单位	Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wu, Fu-Yuan,Ji, Wei-Qiang,Sun, Da-Hai,et al. Zircon U-Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province, China[J]. LITHOS,2012,150:6-25.
APA	Wu, Fu-Yuan,Ji, Wei-Qiang,Sun, Da-Hai,Yang, Yue-Heng,&Li, Xian-Hua.(2012).Zircon U-Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province, China.LITHOS,150,6-25.
MLA	Wu, Fu-Yuan,et al."Zircon U-Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province, China".LITHOS 150(2012):6-25.