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Mafic magma recharge triggered eruption of a long-lived shallow silicic magma reservoir beneath a submarine volcano from the southwestern Okinawa Trough

文献类型：期刊论文

作者Chen, Zuxing1,2,3; Tamehe, Landry Soh4; Zhang, Yuxiang1,2,3; Chen, Shuai1,2,3; Zeng, Zhigang1,2,3,5; Yin, Xuebo1,2,3; Wang, Xiaoyuan1,2,3; Qi, Haiyan1,2,3; Cai, Mingjiang6
刊名LITHOS
出版日期2023-09-01
卷号452页码:12
ISSN号0024-4937
关键词Orthopyroxene Magnetite Dacite Magma mixing Okinawa Trough
DOI10.1016/j.lithos.2023.107229
通讯作者Chen, Zuxing(chenzuxing@qdio.ac.cn) ; Zeng, Zhigang(zgzeng@ms.qdio.ac.cn)
英文摘要Abundant submarine volcanoes have been identified in the southwestern Okinawa Trough, yet the duration of shallow magma reservoirs and processes driving their eruptions remains unclear. Here, the texture and in situ element compositions of orthopyroxene and magnetite in the dacite and mafic magmatic enclaves (MMEs) from the FDV-1 submarine volcano were investigated to decipher the duration of pre-eruption shallow silicic magma storage and eruption triggering processes. Both unzoned and zoned orthopyroxene phenocrysts were observed in the host dacite. The rims of zoned and unzoned orthopyroxene have similar compositions with Mg# from 49 to 55, Cr = 2.31-9.26 & mu;g/g, V = 54.10-137 & mu;g/g, and Ni = 16.44-21.19 & mu;g/g, and they are in equilibrium with the rhyolitic matrix, which is consistent with growth in the shallow silicic magma reservoir. In contrast, the high Mg# cores (Mg# = 63-79) in the zoned orthopyroxenes are in equilibrium with basalt, with significant enrichment in Cr (1092-1737 & mu;g/g), Ni (106-181 & mu;g/g), and V (183-295 & mu;g/g), which indicates a recycled (antecryst) origin by mafic magma recharge and magma mixing. Furthermore, the timescales from Fe-Mg interdiffusion in orthopyroxene phenocrysts suggest that the magma mixing is approximately 600 years before eruption. Correspondingly, the shallow silicic magma reservoir beneath the submarine volcano is longevity. The presence of bubble and V-depleted magnetite aggregates in the MMEs suggests that volatile-saturated and oxidized mafic magma recharges into the shallow silicic magma chamber. Moreover, the distinct contents of relatively fast-diffusing Ni in magnetite between the MMEs and host dacite suggest that the mafic magma in-jection into the silicic magma reservoir and formation of the MMEs must have occurred over very short time -scales (< 24 h) before the eruption to inhibit complete re-equilibration. Therefore, this last mafic magma recharge induces destabilization of the long-lived shallow silicic magma reservoir and leads to the dacitic magma eruption.
WOS关键词CALC-ALKALINE DIFFERENTIATION ; ORTHO-PYROXENE ; TIME-SCALES ; BUBBLE NUCLEATION ; ZONING PATTERNS ; ANDESITE MAGMA ; TRACE-ELEMENT ; DIFFUSION ; FE ; MAGNETITE
资助项目National Natural Science Foundation of China[42106083] ; National Natural Science Foundation of China[91958213] ; National Natural Science Foundation of China[42221005] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB42020402] ; Shandong Provincial Natural Science Foundation, China[ZR2020QD069] ; Shandong Provincial Natural Science Foundation, China[ZR2020MD068] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2020KG11] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2022KG10] ; National Basic Research Program of China[2013CB429700] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER
WOS记录号WOS:001013622100001
源URL[http://ir.qdio.ac.cn/handle/337002/182342]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Chen, Zuxing; Zeng, Zhigang
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Shandong, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
4.China Nonferrous Met Guilin Geol & Min Co Ltd, Guilin 541004, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Quanzhou Normal Univ, Sch Resources & Environm Sci, Quanzhou 362000, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Zuxing,Tamehe, Landry Soh,Zhang, Yuxiang,et al. Mafic magma recharge triggered eruption of a long-lived shallow silicic magma reservoir beneath a submarine volcano from the southwestern Okinawa Trough[J]. LITHOS,2023,452:12.
APA Chen, Zuxing.,Tamehe, Landry Soh.,Zhang, Yuxiang.,Chen, Shuai.,Zeng, Zhigang.,...&Cai, Mingjiang.(2023).Mafic magma recharge triggered eruption of a long-lived shallow silicic magma reservoir beneath a submarine volcano from the southwestern Okinawa Trough.LITHOS,452,12.
MLA Chen, Zuxing,et al."Mafic magma recharge triggered eruption of a long-lived shallow silicic magma reservoir beneath a submarine volcano from the southwestern Okinawa Trough".LITHOS 452(2023):12.

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