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Upper Mantle Hydration Indicated by Decreased Shear Velocity Near the Southern Mariana Trench From Rayleigh Wave Tomography

文献类型：期刊论文

作者Zhu, Gaohua4; Wiens, Douglas A.3; Yang, Hongfeng4; Lin, Jian1,2,7; Xu, Min2,6; You, Qingyu5
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2021-08-16
卷号48期号:15页码:11
ISSN号0094-8276
DOI10.1029/2021GL093309
英文摘要Reduction of seismic velocities has been employed to study the hydration of incoming plates and forearc mantle in recent years. However, few constraints have been obtained in the Southern Mariana Trench. We use an ocean bottom seismograph (OBS) deployment to conduct Rayleigh wave tomographic studies to derive the SV-wave velocity structure near the Southern Mariana Trench. Measured group and phase velocities as a function of period are inverted to determine the SV-wave velocity using a Bayesian Monte Carlo algorithm. The incoming Pacific Plate is characterized by low velocities (3.6-4.1 km/s) within the upper similar to 25 km of the mantle near the trench, indicating extensive mantle hydration of the incoming plate in southern Mariana. The velocity reduction in the forearc mantle is not as large as in central Mariana, most likely indicating a lower forearc serpentinization in this region, which is consistent with the absence of serpentinite mud volcanoes. Plain Language Summary Estimating the amount of water carried by the subduction zone into Earth's interior plays an important role in the global water cycle, but is poorly constrained at subduction zones due to the lack of near-field observations. We utilize data recorded by OBSs near the Southern Mariana Trench. Using seismic imaging methods, we construct an SV-wave velocity model beneath the southernmost Mariana subduction zone. Our model demonstrates low-velocity anomalies within the upper similar to 25 km mantle near the trench, suggesting a large amount of water input in southern Mariana. Furthermore, our seismic observations suggest that low degree serpentinization of the forearc mantle in southern Mariana than central Mariana, agree with the lacking of serpentinite mud volcanoes in the forearc.
WOS关键词PACIFIC PLATE ; SUBDUCTION ; WATER ; SERPENTINIZATION ; EXTRACTION ; SEISMICITY ; DISPERSION ; EVOLUTION ; LOCATION ; NOISE
资助项目Hong Kong Research Grant Council[14313816] ; National Natural Science Foundation of China[91858207] ; National Natural Science Foundation of China[41890813] ; National Natural Science Foundation of China[91628301] ; Chinese Academy of Sciences[Y4SL021001] ; Chinese Academy of Sciences[QYZDY-SSW-DQC005] ; Chinese Academy of Sciences[133244KYSB20180029] ; Chinese Academy of Sciences[COMS2019Q10] ; National Key R&D Program of China[2018YFC0309800] ; National Key R&D Program of China[2018YFC0310105] ; National Key R&D Program of China[2018YFC0308003] ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0205] ; Faculty of Science at CUHK
WOS研究方向Geology
语种英语
WOS记录号WOS:000683512200061
出版者AMER GEOPHYSICAL UNION
资助机构Hong Kong Research Grant Council ; Hong Kong Research Grant Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Faculty of Science at CUHK ; Faculty of Science at CUHK ; Hong Kong Research Grant Council ; Hong Kong Research Grant Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Faculty of Science at CUHK ; Faculty of Science at CUHK ; Hong Kong Research Grant Council ; Hong Kong Research Grant Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Faculty of Science at CUHK ; Faculty of Science at CUHK ; Hong Kong Research Grant Council ; Hong Kong Research Grant Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Faculty of Science at CUHK ; Faculty of Science at CUHK
源URL[http://ir.iggcas.ac.cn/handle/132A11/102585]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Yang, Hongfeng
作者单位1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou, Peoples R China
3.Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA
4.Chinese Univ Hong Kong, Fac Sci, Earth Syst Sci Programme, Hong Kong, Peoples R China
5.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing, Peoples R China
6.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China
7.Woods Hole Oceanog Inst, Dept Geol & Geophys, Falmouth, MA USA
推荐引用方式
GB/T 7714		 Zhu, Gaohua,Wiens, Douglas A.,Yang, Hongfeng,et al. Upper Mantle Hydration Indicated by Decreased Shear Velocity Near the Southern Mariana Trench From Rayleigh Wave Tomography[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(15):11.
APA Zhu, Gaohua,Wiens, Douglas A.,Yang, Hongfeng,Lin, Jian,Xu, Min,&You, Qingyu.(2021).Upper Mantle Hydration Indicated by Decreased Shear Velocity Near the Southern Mariana Trench From Rayleigh Wave Tomography.GEOPHYSICAL RESEARCH LETTERS,48(15),11.
MLA Zhu, Gaohua,et al."Upper Mantle Hydration Indicated by Decreased Shear Velocity Near the Southern Mariana Trench From Rayleigh Wave Tomography".GEOPHYSICAL RESEARCH LETTERS 48.15(2021):11.

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来源：地质与地球物理研究所

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