中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Lithium, Oxygen and Magnesium Isotope Systematics of Volcanic Rocks in the Okinawa Trough: Implications for Plate Subduction Studies

文献类型:期刊论文

作者Zeng, Zhigang1,3,4; Li, Xiaohui4; Zhang, Yuxiang2,4; Qi, Haiyan2,4
刊名JOURNAL OF MARINE SCIENCE AND ENGINEERING
出版日期2022
卷号10期号:1页码:26
关键词Li-O-Mg isotopes magma plate subduction Okinawa Trough western Pacific
DOI10.3390/jmse10010040
通讯作者Zeng, Zhigang(zgzeng@qdio.ac.cn)
英文摘要Determining the influence of subduction input on back-arc basin magmatism is important for understanding material transfer and circulation in subduction zones. Although the mantle source of Okinawa Trough (OT) magmas is widely accepted to be modified by subducted components, the role of slab-derived fluids is poorly defined. Here, major element, trace element, and Li, O and Mg isotopic compositions of volcanic lavas from the middle OT (MOT) and southern OT (SOT) were analyzed. Compared with the MOT volcanic lavas, the T9-1 basaltic andesite from the SOT exhibited positive Pb anomalies, significantly lower Nd/Pb and Ce/Pb ratios, and higher Ba/La ratios, indicating that subducted sedimentary components affected SOT magma compositions. The delta Li-7, delta O-18, and delta Mg-26 values of the SOT basaltic andesite (-5.05 parts per thousand to 4.98 parts per thousand, 4.83 parts per thousand to 5.80 parts per thousand and -0.16 parts per thousand to -0.09 parts per thousand, respectively) differed from those of MOT volcanic lavas. Hence, the effect of the Philippine Sea Plate subduction component, (low delta Li-7 and delta O-18 and high delta Mg-26) on magmas in the SOT was clearer than that in the MOT. This contrast likely appears because the amounts of fluids and/or melts derived from altered oceanic crust (AOC, lower delta O-18) and/or subducted sediment (lower delta Li-7, higher delta O-18 and delta Mg-26) injected into magmas in the SOT are larger than those in the MOT and because the injection ratio between subducted AOC and sediment is always >1 in the OT. The distance between the subducting slab and overlying magma may play a significant role in controlling the differences in subduction components injected into magmas between the MOT and SOT.
WOS研究方向Engineering ; Oceanography
语种英语
出版者MDPI
WOS记录号WOS:000748150800001
源URL[http://ir.qdio.ac.cn/handle/337002/177917]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Zeng, Zhigang
作者单位1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Coll Marine Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao 266071, Peoples R China
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GB/T 7714
Zeng, Zhigang,Li, Xiaohui,Zhang, Yuxiang,et al. Lithium, Oxygen and Magnesium Isotope Systematics of Volcanic Rocks in the Okinawa Trough: Implications for Plate Subduction Studies[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2022,10(1):26.
APA Zeng, Zhigang,Li, Xiaohui,Zhang, Yuxiang,&Qi, Haiyan.(2022).Lithium, Oxygen and Magnesium Isotope Systematics of Volcanic Rocks in the Okinawa Trough: Implications for Plate Subduction Studies.JOURNAL OF MARINE SCIENCE AND ENGINEERING,10(1),26.
MLA Zeng, Zhigang,et al."Lithium, Oxygen and Magnesium Isotope Systematics of Volcanic Rocks in the Okinawa Trough: Implications for Plate Subduction Studies".JOURNAL OF MARINE SCIENCE AND ENGINEERING 10.1(2022):26.

入库方式: OAI收割

来源:海洋研究所

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