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DOI | 10.1029/2021GL095487 |
Enhanced visibility of subduction slabs by the formation of dense hydrous phase A | |
Nao Cai; Xintong Qi; Ting Chen; Siheng Wang; Tony Yu; Yanbin Wang; Toru Inoue; Duojun Wang; Baosheng Li | |
2021-09-17 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Phase A (Mg7Si2O8(OH)6) is one of the important dense hydrous magnesium silicates (DHMS) in subducting slab, because it forms after the breakdown of antigorite serpentine and could be the dominant hydrous phase in the upper mantle deep slab for the water transportation into deep Earth. In this study, the compressional (P) and shear (S) wave velocities of phase A were measured at simultaneous pressure and temperature conditions up to 11 GPa and 1073 K. Combined with elastic properties of olivine and pyroxenes, we calculate the hydration effect on the velocities of harzburgite lithology in cold subduction zones throughout the depth ranges where phase A is thermodynamically stable. Our calculations suggest that the hydration increases both P and S wave velocities of harzburgite; at approximately 5 wt% hydration, its seismic detectability is enhanced by 1-1.5% in velocity contrasts relative to its anhydrous counterpart. |
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/338668 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Nao Cai,Xintong Qi,Ting Chen,et al. Enhanced visibility of subduction slabs by the formation of dense hydrous phase A[J]. Geophysical Research Letters,2021. |
APA | Nao Cai.,Xintong Qi.,Ting Chen.,Siheng Wang.,Tony Yu.,...&Baosheng Li.(2021).Enhanced visibility of subduction slabs by the formation of dense hydrous phase A.Geophysical Research Letters. |
MLA | Nao Cai,et al."Enhanced visibility of subduction slabs by the formation of dense hydrous phase A".Geophysical Research Letters (2021). |
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