Zircon isotope evidence for >= 3.5 Ga continental crust in the Yangtze craton of China
文献类型：期刊论文
| 作者 | Zhang, SB; Zheng, YF; Wu, YB; Zhao, ZF; Gao, S; Wu, FY |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2006-04-20 |
| 卷号 | 146期号:1-2页码:16-34 |
| 关键词 | crustal relict zircon U-Pb age Hf isotope O isotope paleoarchean paleoproterozoic |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2006.01.002 |
| 文献子类 | Article |
| 英文摘要 | The presence or absence of Paleoarchean crust in different continents provides an important basis for a comparison of their growth histories. Since the finding of ca. 3.8 Ga detrital zircon in the North China craton by means of SHRIMP U-Pb dating, it has been a question whether the Yangtze craton, one of the two major blocks constituting the basement of China continent, also contain Palecarchean crustal relicts. It is generally accepted that the basement of the Yangtze craton mainly formed in the Paleoproterozoic, with only minor Archean rocks in ages of 2.5-3.3 Ga. A combined study of zircon U-Pb dating and Hf isotope analyses for the Kongling migmatite and gneiss from this craton reveals the existence of ca. 3.5 Ga rocks. The zircon U-Pb ages are divided into three groups: similar to 3.2 Ga in cores, similar to 2.9 Ga in most grains and similar to 2.0 Ga in rims. Both similar to 3.2 Ga cores and similar to 2.9 Ga grains have negative epsilon(Hr)(t) values of -1.6 and -4.0, respectively. Mantle-like delta(18)O values of 5.6-5.8 parts per thousand were obtained for the zircons, precluding a significant input by sedimentary source component for the magmas that are responsible for protolith of the Kongling metamorphic rocks. From the Hf model ages of these zircons, about 3.5 Ga crustal relicts are speculated to occur in the Kongling rocks. This provides the first demonstration for the existence of Paleoarchean rocks in the Yangtze craton. Thus the early evolutionary history of the Yangtze craton may resemble the North China craton that has crustal relicts with the minimum ages of 3.5 Ga. These Paleoarchean rocks resided in the crust of the Yangtze craton for at least several hundreds of million years before remelting, probably leaving some clues to be traced and verified. Paleoproterozoic U-Pb ages of 1.8-2.0 Ga are identified in magmatic and metamorphic rocks in the Yangtze craton, providing a likely connection of this craton with the North China craton with respect to assembly and breakup of the supercontinent Columbia during the late Paleoproterozoic. (c) 2006 Elsevier B.V. All rights reserved. |
| WOS关键词 | PRESSURE METAMORPHIC ROCKS ; EAST-CENTRAL CHINA ; PLASMA-MASS SPECTROMETRY ; SINO-KOREAN CRATON ; ND ISOCHRON AGE ; U-PB AGES ; LU-HF ; SM-ND ; DEPLETED MANTLE ; SUPERIOR-PROVINCE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000236777500002 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66838]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zheng, YF |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.NW Univ Xian, Dept Geol, MOE Key Lab Continental Dynam, Xian 710069, Peoples R China 4.Chinese Acad Med Sci, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, SB,Zheng, YF,Wu, YB,et al. Zircon isotope evidence for >= 3.5 Ga continental crust in the Yangtze craton of China[J]. PRECAMBRIAN RESEARCH,2006,146(1-2):16-34. |
| APA | Zhang, SB,Zheng, YF,Wu, YB,Zhao, ZF,Gao, S,&Wu, FY.(2006).Zircon isotope evidence for >= 3.5 Ga continental crust in the Yangtze craton of China.PRECAMBRIAN RESEARCH,146(1-2),16-34. |
| MLA | Zhang, SB,et al."Zircon isotope evidence for >= 3.5 Ga continental crust in the Yangtze craton of China".PRECAMBRIAN RESEARCH 146.1-2(2006):16-34. |
入库方式： OAI收割
来源：地质与地球物理研究所
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