Zircon Th-Pb dating by secondary ion mass spectrometry
文献类型：期刊论文
| 作者 | Li, Qiuli1,2; Liu, Yu1,2; Tang, Guoqiang1,2; Wang, Kaiyi1; Ling, Xiaoxiao1; Li, Jiao1 |
| 刊名 | JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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| 出版日期 | 2018-09-01 |
| 卷号 | 33期号:9页码:1536-1544 |
| ISSN号 | 0267-9477 |
| DOI | 10.1039/c8ja00125a |
| 英文摘要 | Zircon has been widely used as a geochronometer with the U-Pb decay system but rarely with the Th-Pb system. However, zircon from carbonatite contains very little U and has a high Th/U ratio, making Th-Pb dating preferable. As a one-dimensional system, a series of consistent Th-Pb ages can be used to date a geological event. In contrast, a wide variation in Th-Pb ages could result from Pb loss or multiple growth events, making it difficult to link to specific geological events. In this study, we described Th-Pb dating protocols on zircon and carried out Th-Pb measurements on seven zircon reference materials using a Cameca IMS 1280HR ion microprobe. The results demonstrated that these seven U-Pb zircon standards have similar absolute concentrations of common lead. The radiogenic Pb-208 concentrations (depending on the Th content and age) determine the proportion of common lead and define the extent of variation in the Th-Pb system under certain analytical conditions. This relationship could be used as a criterion to evaluate whether it is a single population or not based on Th-Pb dating results of unknown zircons. By comparison, M257 and Qinghu zircons are suggested as the most suitable Th-Pb dating standards, with ID-TIMS U-Pb ages representing the best estimate of the Th-Pb reference ages. A zircon sample from the Wu dyke, an extremely rare earth element (REE)-rich carbonatite dyke in the Bayan Obo area, was dated with the established Th-Pb dating procedure and yielded an age of 1327 +/- 20 Ma as the emplacement time. A pronounced relationship between apparent Th-Pb ages and corresponding Th contents (>1500 ppm) indicates that zircons with accumulated radiogenic doses of >1.7 x 10(18) per g may tend to lose radiogenic Pb-208. |
| WOS关键词 | NATURAL REFERENCE MATERIAL ; RICH CARBONATITE DYKE ; U-PB ; BAYAN OBO ; NORTHERN CHINA ; TRACE-ELEMENT ; REE DEPOSIT ; ID-TIMS ; GEOCHRONOLOGY ; SIMS |
| 资助项目 | National Key Research and Development Program of China[2016YFE0203000] ; National Natural Science Foundation of China[41521062] ; National Natural Science Foundation of China[41773044] |
| WOS研究方向 | Chemistry ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000444244600011 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 资助机构 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/88712]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Li, Qiuli |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Qiuli,Liu, Yu,Tang, Guoqiang,et al. Zircon Th-Pb dating by secondary ion mass spectrometry[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,2018,33(9):1536-1544. |
| APA | Li, Qiuli,Liu, Yu,Tang, Guoqiang,Wang, Kaiyi,Ling, Xiaoxiao,&Li, Jiao.(2018).Zircon Th-Pb dating by secondary ion mass spectrometry.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,33(9),1536-1544. |
| MLA | Li, Qiuli,et al."Zircon Th-Pb dating by secondary ion mass spectrometry".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 33.9(2018):1536-1544. |
入库方式： OAI收割
来源：地质与地球物理研究所
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