Oxygen isotopes of whole-rock and zircon and zircon U-Pb ages of meta-rhyolite from the Luzhenguan Group and associated meta-granite in the northern Dabie Mountains
文献类型：期刊论文
| 作者 | Liu JingBo; Zhang LingMin; Ye Kai; Su Wen; Cheng NanFei |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 29期号:5页码:1511-1524 |
| 关键词 | The Luzhenguan Group Zircon U-Pb age Oxygen isotope Granite Qinling-Dabie orogenic belt |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The rhyolites of the Luzhenguan Group and associated granitoids in the northern Dabie Mountains formed in the Neoproterzoic Era. SIMS U-Pb analyses of zircons yield age of 757Ma from two rhyolitic samples, and ages of 757Ma to 770Ma from other three granitic samples, and these ages are interpreted as magmatic crystallization ages. The whole-rock oxygen isotopic compositions of the studied samples display low to negative delta O-18 values, suggesting that the rhyolite of the Luzhenguan Group and associated granitoid suffered meteoric water-in hydrothermal alteration. SIMS oxygen isotopic analyses of zircons show that the rim parts of a few of zircon grains were reworked after magmatism, but the parts of oxygen isotopic changes have not been reset in their U-Pb system, thus the alteration cannot be dated through zircon U-Pb age but is only constrained to occur after 757Ma. Low delta O-18 Magmatic zircons with 2.8 parts per thousand similar to 4.0 parts per thousand delta O-18 values are present in the sample studied, which directly crystallized from low delta O-18 magmas. Low delta O-18 magma was formed via the remelting of previous altered rocks, and in this sense, meteoric water-in hydrothermal alteration in rocks occurred before 770Ma. These time evidences suggest that the rhyolites of the Luzhenguan Group and associated granitoids record meteoric water-in hydrothermal alterations older than 770Ma and younger than 757Ma, which cannot be correlated with the Neoproterzoic glacial events in the Yangtze craton via time. |
| WOS关键词 | ULTRAHIGH-PRESSURE METAMORPHISM ; SOUTH CHINA ; NEOPROTEROZOIC GLACIATIONS ; EASTERN CHINA ; QINGLONGSHAN OXYGEN ; JIANGSU-PROVINCE ; MAGMATIC ZIRCON ; O-18 DEPLETION ; METEORIC WATER ; SULU TERRANE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000321226200005 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86638]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu JingBo |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu JingBo,Zhang LingMin,Ye Kai,et al. Oxygen isotopes of whole-rock and zircon and zircon U-Pb ages of meta-rhyolite from the Luzhenguan Group and associated meta-granite in the northern Dabie Mountains[J]. ACTA PETROLOGICA SINICA,2013,29(5):1511-1524. |
| APA | Liu JingBo,Zhang LingMin,Ye Kai,Su Wen,&Cheng NanFei.(2013).Oxygen isotopes of whole-rock and zircon and zircon U-Pb ages of meta-rhyolite from the Luzhenguan Group and associated meta-granite in the northern Dabie Mountains.ACTA PETROLOGICA SINICA,29(5),1511-1524. |
| MLA | Liu JingBo,et al."Oxygen isotopes of whole-rock and zircon and zircon U-Pb ages of meta-rhyolite from the Luzhenguan Group and associated meta-granite in the northern Dabie Mountains".ACTA PETROLOGICA SINICA 29.5(2013):1511-1524. |
入库方式： OAI收割
来源：地质与地球物理研究所
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