Effects of thermal annealing on water content and δ18O in zircon
文献类型：期刊论文
| 作者 | Yang, Chuan-Mao3,4,5; Xia, Xiao-Ping3,4,5; Gao, Yu-Ya1,3; Wang, Xue2; Zhang, Wan-Feng3,5; Cui, Ze-Xian3,5; Yang, Ya-Nan3,5; Yang, Qing3,5; Xu, Yi-Gang3,4,5 |
| 刊名 | AMERICAN MINERALOGIST
 |
| 出版日期 | 2023 |
| 卷号 | 108期号:3页码:543-551 |
| 关键词 | HF-O ISOTOPES U-PB AGE RADIATION-DAMAGE JACK HILLS WORKING REFERENCE HYDROXYL-GROUPS NATURAL ZIRCON OXYGEN METAMICT EVOLUTION |
| ISSN号 | 0003-004X |
| DOI | 10.2138/am-2022-8444 |
| 英文摘要 | Primary water and oxygen isotope composition are important tools in tracing magma source and evolution. Metamictization of zircon due to U-Th radioactive decay may introduce external secondary water to the crystal, thereby masking the primary water and oxygen isotope signature. Recently, Raman-based screening has been established to select the low-degree metamict zircons. However, such an approach may not be appropriate for ancient samples, in which nearly all zircons are metamict. It was reported that thermal annealing can potentially heal crystals and retrieve primary water content and δ18O information from metamict zircons, given the weaker hydrogen bond of secondary water than that of primary water. Heating experiments at temperatures of 200-1000 °C over a period of 2-10 h reveal that annealing can effectively recover primary water and oxygen isotopes from metamict zircons. Primary water in crystalline and metamict zircons remains intact when heated at 4 h, which represent the optimal annealing treatment condition. Hydrothermally altered zircon is an exception. It only yields the minimum estimate of its primary water contents at 600 °C over a period of >4 h, probably due to partial primary water loss during metamictization for hydrothermal zircons. Moreover, the proportion of low-δ18O (700 °C. This study therefore provides the basis for applying zircon water and δ18O proxies to geologically ancient samples. ? 2023 by Mineralogical Society of America. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000945072800013 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80286]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 作者单位 | 1.National Institute of Metrology, Beijing; 102200, China 2.College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao; 266590, China 3.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou; 511458, China 4.College of Earth and Planetary Sciences, University of the Chinese Academy of Sciences, Beijing; 100049, China 5.State Key Laboratory of Isotope Geochemistry, CAS Center for Excellence in Deep Earth Sciences, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China |
| 推荐引用方式 GB/T 7714 | Yang, Chuan-Mao,Xia, Xiao-Ping,Gao, Yu-Ya,et al. Effects of thermal annealing on water content and δ18O in zircon[J]. AMERICAN MINERALOGIST,2023,108(3):543-551. |
| APA | Yang, Chuan-Mao.,Xia, Xiao-Ping.,Gao, Yu-Ya.,Wang, Xue.,Zhang, Wan-Feng.,...&Xu, Yi-Gang.(2023).Effects of thermal annealing on water content and δ18O in zircon.AMERICAN MINERALOGIST,108(3),543-551. |
| MLA | Yang, Chuan-Mao,et al."Effects of thermal annealing on water content and δ18O in zircon".AMERICAN MINERALOGIST 108.3(2023):543-551. |
入库方式： OAI收割
来源：广州地球化学研究所
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