| Geochemical and chronological evidence for collision of proto-Yap arc/Caroline plateau and rejuvenated plate subduction at Yap trench | |
| Zhang, Ji1,2,3,4,5; Zhang, Guoliang1,2,3,5 | |
| 2020-10-01 | |
| 发表期刊 | LITHOS
 |
| ISSN | 0024-4937 |
| 卷号 | 370页码:15 |
| 摘要 | The Yap Arc was considered to have derived from the proto-Yap-Izu Bonin-Mariana arc system. It is a rare example of subduction of a n oceanic plateau with short arc-trench distance and consists mainly of metamorphic rocks, which arc distinct from the Izu Bonin-Mariana arc system. However, it is not known on the origin and formation time of the basement rocks of the Yap Arc. For the first time, in this study we provide the results of radiometric age-dating and whole-rock major element, trace element and Sr-Nd-Pb-Hf isotope analyses for the metamorphic basement rocks (amphibolites) of the Yap Arc. These rock samples can be classified into three groups based on their major and trace element compositions. Group 1 samples have strong depletion of LREEs and a Dupal-type isotopic signature, and they represent forearc basalts (FABs) of the nascent Yap forearc Group 2 samples have an alkali basalt-like geochemistry and oceanic island basalts (OIBs) type trace element patterns, and they represent the basalts of the Caroline Plateau. Group 3 samples have island-arc-type negative anomalies of Nb-Ta-Zr-lif, and they may represent the volcanic rocks of the proto-Yap Arc. These amphibolites were formed at 21 Ma according to Ar-40/Ar-39 amphibole dating and in situ SIMS U-Pb titanite dating, and they record the timing of the collisional event between the Caroline Plateau and the proto-Yap Arc. We propose that the Yap arc has been evolving distinctly from the Izu-Bonin-Mariana Arc since this collision time. These rocks were metamorphosed and brought onto the present Yap Arc as a result of the collision between the proto-Yap Arc and the Caroline Plateau. Based on the new results of age-dating and geochemistry of this study, we propose three stages of tectonic evolution for the Yap Arc as a result of collision from the Caroline plateau: an early stage (proto-Yap Arc) of subduction of the Caroline Plate, collision of the proto-Yap Arc with the in-coming young Caroline Plateau, and rejuvenated plate subduction at the Yap Trench with limited volcanism. (C) 2020 Elsevier B.V. All rights reserved. |
| 关键词 | Metamorphism Formation age Plate subduction Collision Caroline plateau Yap Arc |
| DOI | 10.1016/j.lithos.2020.105616 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050101]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020302]; National Natural Science Foundation of China[91858206]; National Natural Science Foundation of China[41876040]; Senior User Project of RV KEXUE[KEXUE2018G09]; Taishan Scholars Program of Shandong Province[tsqn201909157]; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, China[MGQNLM-TD201806] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| WOS类目 | Geochemistry & Geophysics ; Mineralogy |
| WOS记录号 | WOS:000558896300011 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/168178 |
| 专题 | 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, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266237, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所; 中国科学院海洋大科学研究中心 |
| 通讯作者单位 | 中国科学院海洋研究所; 中国科学院海洋大科学研究中心 |
| 推荐引用方式 GB/T 7714 | Zhang, Ji,Zhang, Guoliang. Geochemical and chronological evidence for collision of proto-Yap arc/Caroline plateau and rejuvenated plate subduction at Yap trench[J]. LITHOS,2020,370:15. |
| APA | Zhang, Ji,&Zhang, Guoliang.(2020).Geochemical and chronological evidence for collision of proto-Yap arc/Caroline plateau and rejuvenated plate subduction at Yap trench.LITHOS,370,15. |
| MLA | Zhang, Ji,et al."Geochemical and chronological evidence for collision of proto-Yap arc/Caroline plateau and rejuvenated plate subduction at Yap trench".LITHOS 370(2020):15. |
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