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DOI | 10.1029/2021GL093309 |
Upper mantle hydration indicated by decreased shear velocity near the Southern Mariana Trench from Rayleigh wave tomography | |
Gaohua Zhu; Douglas A. Wiens; Hongfeng Yang; Jian Lin; Min Xu; Qingyu You | |
2021-07-26 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
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 ∼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. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335412 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Gaohua Zhu,Douglas A. Wiens,Hongfeng Yang,et al. Upper mantle hydration indicated by decreased shear velocity near the Southern Mariana Trench from Rayleigh wave tomography[J]. Geophysical Research Letters,2021. |
APA | Gaohua Zhu,Douglas A. Wiens,Hongfeng Yang,Jian Lin,Min Xu,&Qingyu You.(2021).Upper mantle hydration indicated by decreased shear velocity near the Southern Mariana Trench from Rayleigh wave tomography.Geophysical Research Letters. |
MLA | Gaohua Zhu,et al."Upper mantle hydration indicated by decreased shear velocity near the Southern Mariana Trench from Rayleigh wave tomography".Geophysical Research Letters (2021). |
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