Contrasting Lu-Hf and U-Th-Pb isotope systematics between metamorphic growth and recrystallization of zircon from eclogite-facies metagranites in the Dabie orogen, China
文献类型：期刊论文
| 作者 | Xia, Qiong-Xia1; Zheng, Yong-Fei1; Yuan, Honglin2; Wu, Fu-Yuan3 |
| 刊名 | LITHOS
 |
| 出版日期 | 2009-10-01 |
| 卷号 | 112期号:3-4页码:477-496 |
| 关键词 | Zircon Metamorphic growth Metamorphic recrystallization Aqueous fluid Hydrous melt Subduction zone Protolith inheritance |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2009.04.015 |
| 文献子类 | Review |
| 英文摘要 | Different types of metamorphic zircon are recognized by a combined study of petrography, U-Th-Pb and Lu-Hf elements and isotopes in zircons from eclogite-facies metagranites in the Dabie orogen. The results provide petrological distinction between metamorphic growth and recrystallization with respect to protolith inheritance, fluid and melt effects. Zircon U-Pb dating for the metagranites yields two groups of ages at 778 +/- 13 Ma and 223 +/- 4 Ma, respectively, corresponding to protolith formation in the Neoproterozoic and metamorphic modification in the Triassic. Metamorphically grown zircons from the aqueous fluid are characterized by concordant Triassic U-Pb ages, relatively high U contents but low Th contents, low Th/U and Lu-176/Hf-177 ratios, and elevated Hf isotope ratios. Metamorphically grown zircons from the hydrous melt show concordant Triassic U-Pb ages, very high contents of both Th and U, elevated Hf-176/Hf-177 ratios, but almost unchanged Lu-176/Hf-177 ratios. Metamorphic recrystallization is commonly associated with discordant U-Pb ages between Neoproterozoic and Triassic, but availability of fluid/melt dictates the extent to which internal structure. morphology, U-Th-Pb and Lu-Hf element and isotope systems of protolith zircon were modified by metamorphic dehydration and partial melting. While the zircon U-Th-Pb isotope systems can be variably reset by solid-state recrystallization, its initial Hf isotope signature keeps unchanged at the same conditions. On the other hand. dissolution rectystallization causes almost complete resetting of the U-Th-Pb chronometric systems to concordant ages at the metamorphic time, but it does not significantly change the Lu-Hf isotope compositions. Replacement recrystallization resets the zircon U-Th-Pb and Lu-Hf isotope systems to variable degrees, depending on the activity of metamorphic fluid/melt. Consequently, the five types of metamorphic zircon are distinguished not only between growth from the aqueous fluid and the hydrous melt but also between the recrystallization via the solid-state, replacement and dissolution mechanisms. This provides insights into the behavior of zircon during subduction-zone metamorphism, particularly that concerning dehydration melting during exhumation. (C) 2009 Elsevier B.V. All rights reserved. |
| WOS关键词 | SUBDUCTED CONTINENTAL-CRUST ; ULTRAHIGH-PRESSURE ECLOGITE ; SOLID-STATE RECRYSTALLIZATION ; PLASMA-MASS SPECTROMETRY ; HIGH-GRADE METAMORPHISM ; ZONE SOUTHERN ALPS ; EASTERN CHINA ; TRACE-ELEMENT ; SULU OROGEN ; O-ISOTOPE |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000271389800021 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Ministry of Science and Technology(2009CB825004) ; Chinese Ministry of Science and Technology(2009CB825004) ; Natural Science Foundation of China(40830318) ; Natural Science Foundation of China(40830318) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Ministry of Science and Technology(2009CB825004) ; Chinese Ministry of Science and Technology(2009CB825004) ; Natural Science Foundation of China(40830318) ; Natural Science Foundation of China(40830318) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Ministry of Science and Technology(2009CB825004) ; Chinese Ministry of Science and Technology(2009CB825004) ; Natural Science Foundation of China(40830318) ; Natural Science Foundation of China(40830318) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Academy of Sciences(kzcx2-yw-131) ; Chinese Ministry of Science and Technology(2009CB825004) ; Chinese Ministry of Science and Technology(2009CB825004) ; Natural Science Foundation of China(40830318) ; Natural Science Foundation of China(40830318) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70961]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zheng, Yong-Fei |
| 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.NW Univ Xian, State Key Lab Continental Dynam, Dept Geol, Xian 710069, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Qiong-Xia,Zheng, Yong-Fei,Yuan, Honglin,et al. Contrasting Lu-Hf and U-Th-Pb isotope systematics between metamorphic growth and recrystallization of zircon from eclogite-facies metagranites in the Dabie orogen, China[J]. LITHOS,2009,112(3-4):477-496. |
| APA | Xia, Qiong-Xia,Zheng, Yong-Fei,Yuan, Honglin,&Wu, Fu-Yuan.(2009).Contrasting Lu-Hf and U-Th-Pb isotope systematics between metamorphic growth and recrystallization of zircon from eclogite-facies metagranites in the Dabie orogen, China.LITHOS,112(3-4),477-496. |
| MLA | Xia, Qiong-Xia,et al."Contrasting Lu-Hf and U-Th-Pb isotope systematics between metamorphic growth and recrystallization of zircon from eclogite-facies metagranites in the Dabie orogen, China".LITHOS 112.3-4(2009):477-496. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。