| Volatile Characteristics of Apatite in Dacite from the Eastern Manus Basin and Their Geological Implications | |
Du, Xiaoning1,2,3 ; Zeng, Zhigang1,2,4; Chen, Zuxing1,3
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| 2022-05-01 | |
| 发表期刊 | JOURNAL OF MARINE SCIENCE AND ENGINEERING
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| 卷号 | 10期号:5页码:21 |
| 通讯作者 | Zeng, Zhigang([email protected]) |
| 摘要 | As one of the youngest back-arc basins, the evolutionary behavior of magmatic volatiles in the Eastern Manus Basin has been poorly studied. Recently, apatite has received widespread attention for its powerful function in recording information on magmatic volatiles. In this paper, by determining the major element compositions and primary volatile abundances (F, Cl, SO3) of apatites in dacite, we analyze the compositions of volatiles before magma eruption in the Eastern Manus Basin, as well as their indications for magmatic oxygen fugacity and petrogenesis, so as to improve the study about the evolution of magmatic volatiles in this region. Experimental data indicate that apatite saturation temperatures range from 935 to 952 degrees C. All the apatites are magmatic apatites with F contents of 0.87-1.39 wt.%, Cl contents of 1.24-1.70 wt.%, and SO3 <= 0.06 wt.%. Analysis reveals that the apatites in this study crystallized from volatile-undersaturated melts, so their chemical compositions can be used as indicators of magmatic compositions. According to calculations, the minimum S concentrations of the host melts range from 2-65 ppm or 8-11 ppm. The crystallization and separation of magnetite caused the reduction state of melts, and the relatively low oxygen fugacity (Delta FMQ = -0.2 +/- 0.9) caused low SO3 contents in apatites. In addition, F and Cl contents of the host melt were calculated to be 185-448 ppm and 1059-1588 ppm, corresponding to the H2O contents of 1.4-2.1% and 1.2-1.5% (error +/- 30-40%), respectively. The high Cl/F ratio and H2O contents of samples indicate the addition of slab-derived fluids in the mantle source region of the Eastern Manus Basin. High F contents of the melts may be influenced by F-rich sediments, as well as the release of F from lawsonite and phengite decomposition. High Cl appears to originate from the dual influence of subduction-released fluids and Cl-rich seawater-derived components. Further, it is estimated that 14-21% of the total Cl concentrations in melts were added directly from subduction-released fluids, or higher. |
| 关键词 | Eastern Manus Basin apatite dacite magma evolution volatile |
| DOI | 10.3390/jmse10050698 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[91958213]; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB42020402]; National Basic Research Program of China[2013CB429700]; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] |
| WOS研究方向 | Engineering ; Oceanography |
| WOS类目 | Engineering, Marine ; Engineering, Ocean ; Oceanography |
| WOS记录号 | WOS:000801322600001 |
| 出版者 | MDPI |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/179360 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zeng, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266237, 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 |
| 推荐引用方式 GB/T 7714 | Du, Xiaoning,Zeng, Zhigang,Chen, Zuxing. Volatile Characteristics of Apatite in Dacite from the Eastern Manus Basin and Their Geological Implications[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2022,10(5):21. |
| APA | Du, Xiaoning,Zeng, Zhigang,&Chen, Zuxing.(2022).Volatile Characteristics of Apatite in Dacite from the Eastern Manus Basin and Their Geological Implications.JOURNAL OF MARINE SCIENCE AND ENGINEERING,10(5),21. |
| MLA | Du, Xiaoning,et al."Volatile Characteristics of Apatite in Dacite from the Eastern Manus Basin and Their Geological Implications".JOURNAL OF MARINE SCIENCE AND ENGINEERING 10.5(2022):21. |
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| jmse-10-00698-v2.pdf（14341KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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