Precambrian detrital zircons in the Early Paleozoic Chinese Altai: Their provenance and implications for the crustal growth of central Asia
文献类型：期刊论文
| 作者 | Jiang, Yingde1; Sun, Min1; Zhao, Guochun1; Yuan, Chao2; Xiao, Wenjiao3; Xia, Xiaoping2; Long, Xiaoping2; Wu, Fuyuan3 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2011-08-01 |
| 卷号 | 189期号:1-2页码:140-154 |
| 关键词 | Detrital age Metasedimentary rocks Chinese Altai Tuva-Mongolian block CAOB |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2011.05.008 |
| 文献子类 | Article |
| 英文摘要 | The basement characteristic of the Chinese Altai is not firmly constrained, which has strictly hindered our understanding of the early crustal growth in the region. The presence of Precambrian detrital zircons in metasedimentary rocks and xenocrystic zircons in granitoids may be regarded as evidence for the existence of unexposed old basement rocks, but can also be explained as detritus originally derived from a nearby cratonic fragment. This paper reports detrital zircon U-Pb and Hf isotopic data for both low- and high-grade metasedimentary rocks from the Chinese Altai. Zircons from these samples have similar age patterns and Hf isotopic compositions. They are characterized by an overwhelming dominance of Neoproterozoic-Early Paleozoic ages, with prominent peaks around 465-542 Ma and epsilon(Hf)(t) values varying from -25 to +15. Besides, a few zircons cluster at 1.8-2.0 Ga and sparse ones yield discordant ages around 2.3-2.6 Ga, and both give negative epsilon(Hf)(t) values between 0 and -28. Combined with previous results in the region, our data suggest that low- and high-grade metasedimentary rocks most likely derived from similar provenances. These data, plus some xenocrystic zircon ages from the granitoid rocks, are quite comparable with the age patterns of the micro-continents and arc terranes in western Mongolia. The zircon population of 440-580 Ma is dominant for gneissic granitoids within the Neoproterozoic-Early Paleozoic terranes in western Mongolian and the Chinese Altai. The Precambrian zircons (>540 Ma) resemble those from old rocks preserved in the Tuva-Mongolian (TM) block and its adjacent arc terranes. Therefore, we suggest that old zircons in the Chinese Altai more likely represent the detritus recycled from western Mongolia. Moreover, information from the TM-derived Precambrian zircons, combined with previous palaeomagnetic constraints, favors northern India as the potential origin for the TM block, from which a small micro-continent drifted northwards and incorporated into the CAOB in a time interval from the Neoproterozoic to Early Paleozoic. Accordingly, the crustal growth of the CAOB in western Mongolia and the Chinese Altai could be outlined by a single accretionary system, and secular amalgamation of magmatic arcs around a Precambrian micro-continent can account for the accretionary history of the region in the Early Paleozoic time. (C) 2011 Elsevier B.V. All rights reserved. |
| WOS关键词 | BAYANKHONGOR OPHIOLITE ZONE ; HF ISOTOPIC COMPOSITIONS ; TUVA-MONGOLIA MASSIF ; U-PB GEOCHRONOLOGY ; OROGENIC BELT ; ARAVALLI CRATON ; TECTONIC IMPLICATIONS ; NORTHWEST CHINA ; ICP-MS ; CONTINENTAL GROWTH |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000293931400008 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Chinese National 973 Program(2007CB411308) ; Chinese National 973 Program(2007CB411308) ; Hong Kong Research Grants Council(HKU704307P) ; Hong Kong Research Grants Council(HKU704307P) ; NSFC(40725009) ; NSFC(40725009) ; Hong Kong University ; Hong Kong University ; Hong Kong-Germany Joint research Scheme ; Hong Kong-Germany Joint research Scheme ; Chinese National 973 Program(2007CB411308) ; Chinese National 973 Program(2007CB411308) ; Hong Kong Research Grants Council(HKU704307P) ; Hong Kong Research Grants Council(HKU704307P) ; NSFC(40725009) ; NSFC(40725009) ; Hong Kong University ; Hong Kong University ; Hong Kong-Germany Joint research Scheme ; Hong Kong-Germany Joint research Scheme ; Chinese National 973 Program(2007CB411308) ; Chinese National 973 Program(2007CB411308) ; Hong Kong Research Grants Council(HKU704307P) ; Hong Kong Research Grants Council(HKU704307P) ; NSFC(40725009) ; NSFC(40725009) ; Hong Kong University ; Hong Kong University ; Hong Kong-Germany Joint research Scheme ; Hong Kong-Germany Joint research Scheme ; Chinese National 973 Program(2007CB411308) ; Chinese National 973 Program(2007CB411308) ; Hong Kong Research Grants Council(HKU704307P) ; Hong Kong Research Grants Council(HKU704307P) ; NSFC(40725009) ; NSFC(40725009) ; Hong Kong University ; Hong Kong University ; Hong Kong-Germany Joint research Scheme ; Hong Kong-Germany Joint research Scheme |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74728]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Sun, Min |
| 作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Yingde,Sun, Min,Zhao, Guochun,et al. Precambrian detrital zircons in the Early Paleozoic Chinese Altai: Their provenance and implications for the crustal growth of central Asia[J]. PRECAMBRIAN RESEARCH,2011,189(1-2):140-154. |
| APA | Jiang, Yingde.,Sun, Min.,Zhao, Guochun.,Yuan, Chao.,Xiao, Wenjiao.,...&Wu, Fuyuan.(2011).Precambrian detrital zircons in the Early Paleozoic Chinese Altai: Their provenance and implications for the crustal growth of central Asia.PRECAMBRIAN RESEARCH,189(1-2),140-154. |
| MLA | Jiang, Yingde,et al."Precambrian detrital zircons in the Early Paleozoic Chinese Altai: Their provenance and implications for the crustal growth of central Asia".PRECAMBRIAN RESEARCH 189.1-2(2011):140-154. |
入库方式： OAI收割
来源：地质与地球物理研究所
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