Control of subduction rate on Tonga-Kermadec arc magmatism
文献类型：期刊论文
| 作者 | Luo Qing3,4; Zhang Guoliang1,2,4 |
| 刊名 | JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 36期号:3页码:687-699 |
| ISSN号 | 2096-5508 |
| 关键词 | subduction rate arc magmatism Tonga-Kermadec Arc |
| DOI | 10.1007/s00343-018-7026-8 |
| 通讯作者 | Zhang Guoliang(zhangguoliang@qdio.ac.cn) |
| 英文摘要 | Dehydration/melting of oceanic crusts during returning to the mantle in subduction zones are related to origin of arc laves. The factors that influence arc magmatism include compositions of the subducting slabs, mantle wedge and subduction rates. However, distinguishing these factors remains difficult and highly debated. Subducting rate is related to the total mass of inputs and controls thermal structure, thus plays a crucial role in arc magmatism. Here we explore the relationships between geochemical variations of arc laves and convergence rates (increasing from 46 mm/a to the south to 83 mm/a to the northward) in the Tonga-Kermadec arc system. Data of geochemistry for lava samples from nine islands of this arc system are collected and compiled to investigate the role of subduction rate in arc magmatism. Laves from the northern Tonga arc with a faster subduction rate show broadly lower concentrations of TiO2 and high-field-strength elements (HFSEs, e.g. Nb, Ta, Zr, Hf), and higher Ba/Th, U/Th ratios than the Kermadec Arc to the south. Some of the Kermadec laves show the highest values of Th/Nb ratio. We suggest that the northern Tonga arc with a higher subduction rate has been influenced by a stronger role of subduction-released fluid, which results in stronger large-ion-lithophile elements (LILEs) and relatively weaker HFSEs contribution. It is interpreted that faster subduction rate tend to create a cooler subduction zone, leading to stronger dehydration subduction slab contribution with, thus, higher LILE/HFSE ratios of arc laves. The conclusion contributes to a better understanding of arc magmatism, and ultimately the long-term chemical differentiation of the Earth. More supplementary geochemical data along Tonga-Kermadec arc and tests in other arcs are needed. |
| 资助项目 | National Natural Science Foundation of China[41376065] ; National Natural Science Foundation of China[41522602] ; National Program on Global Change and Air-Sea Interaction[GASI-GEOGE-02] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA11030103] ; Project of AoShan Excellent Scholar for Qingdao National Laboratory for Marine Science and Technology |
| WOS研究方向 | Marine & Freshwater Biology ; Oceanography |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000438791100009 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/163504]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Zhang Guoliang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Deep Sea Extreme Environm & Life Proc Ctr, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo Qing,Zhang Guoliang. Control of subduction rate on Tonga-Kermadec arc magmatism[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2018,36(3):687-699. |
| APA | Luo Qing,&Zhang Guoliang.(2018).Control of subduction rate on Tonga-Kermadec arc magmatism.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,36(3),687-699. |
| MLA | Luo Qing,et al."Control of subduction rate on Tonga-Kermadec arc magmatism".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 36.3(2018):687-699. |
入库方式： OAI收割
来源：海洋研究所
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。