U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt: Tectonic implications and evidence for an Early-Permian mantle plume

doi:10.1016/j.gr.2010.11.015

	U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt: Tectonic implications and evidence for an Early-Permian mantle plume
	Su, Ben-Xun 1,2; Qin, Ke-Zhang 2; Sakyi, Patrick Asamoah 3; Li, Xian-Hua 1; Yang, Yue-Heng 1; Sun, He 2; Tang, Dong-Mei 2; Liu, Ping-Ping 4; Xiao, Qing-Hua 2; Malaviarachchi, Sanjeewa P. K.1,5
刊名	GONDWANA RESEARCH
	2011-09-01
卷号	20 期号:2-3 页码:516-531
关键词	Central Asian Orogenic Belt Mafic-ultramafic Complex Mantle Plume U-pb-hf-o Isotope Zircon
ISSN号	1342-937X
DOI	10.1016/j.gr.2010.11.015
文献子类	Article
英文摘要	U-Pb age and Hf-O isotope data of zircons from the mafic-ultramafic complexes and their related rhyolites and granites in the Eastern Tianshan and Beishan regions were obtained by SIMS and LA-ICPMS. The Hf-O isotopic composition and Hf model age of the zircons are closely related to their tectonic setting and formation age. The zircons from the mafic-ultramafic complexes in the Bogeda-Haerlike and Jueluotage belts have higher epsilon(Hf)(t) ( +8- +17) and lower delta O-18 (+4 parts per thousand-+6 parts per thousand.), whereas most of the zircons in the gabbros, granites and rhyolite from the Middle Tianshan Massif and Beishan Rift display lower epsilon(Hf)(t) (0- + 8) and higher delta O-18 (+5 parts per thousand- + 8 parts per thousand). The positive epsilon(Hf)(t) and relatively lower delta O-18 values suggest that these mafic-ultramafic complexes were derived from depleted mantle which was subjected to subduction-related modification processes. The Hf isotopic composition of zircons in the granites has revealed that the growth of juvenile crust was also very significant in the southern margin of the Central Asian Orogenic Belt during the Paleozoic. The Hf model ages of the analyzed zircons, together with the regional geology suggest that the Beishan area had a northward subduction, possibly from ca. 900 Ma to ca. 400 Ma, whereas the Eastern Tianshan had a south-directed subduction most likely from ca. 600 Ma to ca. 310 Ma. Additionally, zircons with ca. 280 Ma U-Pb ages display wider and more scattered epsilon(Hf)(t) and delta O-18 variations than the relatively older and younger ones, which further support the Early Permian mantle plume model. (C) 2010 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词	EASTERN TIANSHAN MOUNTAINS ; PHANEROZOIC CRUSTAL GROWTH ; ORE-FORMING PROCESSES ; CU-NI DEPOSIT ; NW CHINA ; CONTINENTAL GROWTH ; GEOLOGICAL IMPLICATIONS ; NORTHWESTERN CHINA ; BEISHAN AREA ; GEOCHEMICAL CHARACTERISTICS
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000294075700017
资助机构	Nature Science Foundation of China(41030424) ; Nature Science Foundation of China(41030424) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese State 305 Program(2006BAB07B03-01) ; Chinese State 305 Program(2006BAB07B03-01) ; Nature Science Foundation of China(41030424) ; Nature Science Foundation of China(41030424) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese State 305 Program(2006BAB07B03-01) ; Chinese State 305 Program(2006BAB07B03-01) ; Nature Science Foundation of China(41030424) ; Nature Science Foundation of China(41030424) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese State 305 Program(2006BAB07B03-01) ; Chinese State 305 Program(2006BAB07B03-01) ; Nature Science Foundation of China(41030424) ; Nature Science Foundation of China(41030424) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese Academy of Sciences(KZCX2-YW-107) ; Chinese State 305 Program(2006BAB07B03-01) ; Chinese State 305 Program(2006BAB07B03-01)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73978]
专题	中国科学院地质与地球物理研究所
通讯作者	Su, Ben-Xun
作者单位	1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Univ Ghana, Dept Earth Sci, Legon, Ghana 4.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia
推荐引用方式 GB/T 7714	Su, Ben-Xun,Qin, Ke-Zhang,Sakyi, Patrick Asamoah,et al. U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt: Tectonic implications and evidence for an Early-Permian mantle plume[J]. GONDWANA RESEARCH,2011,20(2-3):516-531.
APA	Su, Ben-Xun.,Qin, Ke-Zhang.,Sakyi, Patrick Asamoah.,Li, Xian-Hua.,Yang, Yue-Heng.,...&Malaviarachchi, Sanjeewa P. K..(2011).U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt: Tectonic implications and evidence for an Early-Permian mantle plume.GONDWANA RESEARCH,20(2-3),516-531.
MLA	Su, Ben-Xun,et al."U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt: Tectonic implications and evidence for an Early-Permian mantle plume".GONDWANA RESEARCH 20.2-3(2011):516-531.