Zircon U-Pb and Hf isotopic study of gneissic rocks from the Chinese Altai: Progressive accretionary history in the early to middle Palaeozoic
文献类型：期刊论文
| 作者 | Sun, Min1; Yuan, Chao2; Xiao, Wenjiao3; Long, Xiaoping1,2; Xia, Xiaoping1; Zhao, Guochun1; Lin, Shoufa4; Wu, Fuyuan3; Kroener, A.5 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2008-01-30 |
| 卷号 | 247期号:3-4页码:352-383 |
| 关键词 | U-Pb age Hf isotope gneiss zircon Altaids |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2007.10.026 |
| 文献子类 | Review |
| 英文摘要 | Gneissic rocks in the Chinese Altai Mountains have been interpreted as either Paleozoic metasedimentary rocks or Precambrian basement. This study reports geochemical and geochronological data for banded paragneisses and associated gneissic granitoids collected along a NE-SW traverse in the northwestern Chinese Altai. Petrological and geochemical data suggest that the protoliths of the banded gneisses were possibly immature sediments with significant volcanic input and that the gneissic granitoids were derived from I-type granites formed in a subduction environment. Three types of morphological features can be recognized in zircons from the banded gneisses and are interpreted to correlate with different sources. Zircons from five samples of banded paragneiss cluster predominantly between 466 and 528 Ma, some give Neoproterozoic ages, and a few yield discordant Paleoproterozoic to Archean ages. Zircon Hf isotopic compositions indicate that both juvenile/mantle and crust materials were involved in the generation of the source rocks from which these zircons were derived. In contrast, zircons occur ubiquitously as elongated euhedral prismatic crystals in the four samples of the gneissic granitoids, and define single populations for each sample with mean ages between 380 and 453 Ma. The general absence of Precambrian inheritance and positive zircon epsilon Hf values for these granitoids suggest insignificant crustal contribution to the generation of the precursor magmas. Our data can be interpreted in terms of a progressive accretionary history in early to middle Palaeozoic times, and the Chinese Altai may possibly represent a magmatic arc built on a continental margin dominated by Neoproterozoic rocks. (C) 2007 Elsevier B.V. All rights reserved. |
| WOS关键词 | PHANEROZOIC CRUSTAL GROWTH ; TETRAD REE PATTERNS ; ASIAN OROGENIC BELT ; TECTONIC EVOLUTION ; NORTHWEST CHINA ; ALDAN SHIELD ; CONTINENTAL GROWTH ; NORTHERN XINJIANG ; SEDIMENTARY-ROCKS ; VOLCANIC-ROCKS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000253178000003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70108]  |
| 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, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Waterloo, Dept Earth Sci, Waterloo, ON N2L 3G1, Canada 5.Johannes Gutenberg Univ Mainz, Dept Geosci, D-55099 Mainz, Germany |
| 推荐引用方式 GB/T 7714 | Sun, Min,Yuan, Chao,Xiao, Wenjiao,et al. Zircon U-Pb and Hf isotopic study of gneissic rocks from the Chinese Altai: Progressive accretionary history in the early to middle Palaeozoic[J]. CHEMICAL GEOLOGY,2008,247(3-4):352-383. |
| APA | Sun, Min.,Yuan, Chao.,Xiao, Wenjiao.,Long, Xiaoping.,Xia, Xiaoping.,...&Kroener, A..(2008).Zircon U-Pb and Hf isotopic study of gneissic rocks from the Chinese Altai: Progressive accretionary history in the early to middle Palaeozoic.CHEMICAL GEOLOGY,247(3-4),352-383. |
| MLA | Sun, Min,et al."Zircon U-Pb and Hf isotopic study of gneissic rocks from the Chinese Altai: Progressive accretionary history in the early to middle Palaeozoic".CHEMICAL GEOLOGY 247.3-4(2008):352-383. |
入库方式： OAI收割
来源：地质与地球物理研究所
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