Knowledge Management System Of Institute of Oceanology, Chinese Academy of Sciences
| High-potassium volcanic rocks from the Okinawa Trough: Implications for a cryptic potassium-rich and DUPAL-like source | |
| Zhang, Yuxiang1,3; Zeng, Zhigang1,2,3; Li, Xiaohui1,3; Yin, Xuebo1; Wang, Xiaoyuan1,2; Chen, Shuai1 | |
| 2018-09-01 | |
| 发表期刊 | GEOLOGICAL JOURNAL
 |
| ISSN | 0072-1050 |
| 卷号 | 53期号:5页码:1755-1766 |
| 通讯作者 | Zeng, Zhigang(zgzeng@qdio.ac.cn) |
| 摘要 | Major element, trace element, and Sr-Nd-Pb isotopic compositions of high-potassium calc-alkaline rhyolites (the T6 rhyolites) collected from the western slope of the middle Okinawa Trough (MOT) are reported in this article. These high-potassium rhyolites have similar major and trace elemental compositions as Type 2 rhyolites from the MOT, except that the former contain higher concentrations of K2O, Th, U, and Rb and lower concentrations of Sr and Eu. Experimental data indicate that the T6 rhyolites cannot be sourced from low- to mid-potassium MOT rocks by either fractional crystallization or partial melting processes but are instead derived from a cryptic potassium-rich source beneath the Okinawa Trough (OT). Considering that high-potassium volcanic rocks are distributed throughout the East China Sea Shelf, the Ryukyu Arc, and Kyushu Island, the high-potassium OT rocks could represent an important connection between the OT and its adjacent regions. Compared to volcanic rocks from the MOT axial zone, the T6 rhyolites have more depleted Sr-Nd isotopic compositions (Sr-87/Sr-86=0.7035-0.7036, Nd-143/Nd-144=0.51291-0.51297) but much more enriched compositions of Pb-207 (Pb-207/Pb-204=15.60-15.63) and Pb-208 (Pb-208/Pb-204=38.45-38.57), thus recording a significant DUPAL-like signature. These isotopic anomalies cannot be explained by the incorporation of subducting sediments or crustal contamination but instead imply the presence of a DUPAL-like mantle source beneath the OT. The decrease of the DUPAL-like anomaly from the T6 rhyolites to the MOT axial zone volcanic rocks is consistent with the injection of an normal mid-ocean ridge basalt (N-MORB) mantle source, such as asthenospheric material, into pre-existing DUPAL-like mantle during back-arc extension. |
| 关键词 | DUPAL-like anomaly high-potassium calc-alkaline Okinawa Trough potassium-rich source rhyolite |
| DOI | 10.1002/gj.3000 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Key Basic Research Program of China[2013CB429700] ; National Natural Science Foundation of China[41325021] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; AoShan Talents Program[2015ASTP-0S17] ; Innovative Talent Promotion Program[2012RA2191] ; Science and Technology Development Program of Shandong Province[2013GRC31502] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; Scientific and Technological Innovation Project - Qingdao National laboratory for Marine Science and Technology[2015ASKJ03] ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Qingdao Collaborative Innovation Center of Marine Science and Technology ; National Key Basic Research Program of China[2013CB429700] ; National Natural Science Foundation of China[41325021] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; Aoshan Talents Program[2015ASTP-0S17] ; Innovative Talent Promotion Program[2012RA2191] ; Science and Technology Development Program of Shandong Province[2013GRC31502] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Qingdao Collaborative Innovation Center of Marine Science and Technology |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000443563400009 |
| 出版者 | WILEY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/160013 |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Zeng, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 通讯作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Zhang, Yuxiang,Zeng, Zhigang,Li, Xiaohui,et al. High-potassium volcanic rocks from the Okinawa Trough: Implications for a cryptic potassium-rich and DUPAL-like source[J]. GEOLOGICAL JOURNAL,2018,53(5):1755-1766. |
| APA | Zhang, Yuxiang,Zeng, Zhigang,Li, Xiaohui,Yin, Xuebo,Wang, Xiaoyuan,&Chen, Shuai.(2018).High-potassium volcanic rocks from the Okinawa Trough: Implications for a cryptic potassium-rich and DUPAL-like source.GEOLOGICAL JOURNAL,53(5),1755-1766. |
| MLA | Zhang, Yuxiang,et al."High-potassium volcanic rocks from the Okinawa Trough: Implications for a cryptic potassium-rich and DUPAL-like source".GEOLOGICAL JOURNAL 53.5(2018):1755-1766. |
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| High-potassium volca（1052KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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