Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094470 |
Small-scale intra-slab heterogeneity weakens into the mantle transition zone | |
Zhichao Shen; Zhongwen Zhan; Jennifer M. Jackson | |
2021-11-16 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Small-scale intra-slab heterogeneity is well documented seismically in multiple subduction zones, but its nature remains elusive. Previous efforts have been mostly focusing on the scattering strength at intermediate depth (<350 km), without constraining its evolution as a function of depth. Here, we illustrate that the inter-source interferometry method, which turns deep earthquakes into virtual receivers, can resolve small-scale intra-slab heterogeneity in the mantle transition zone. The interferometric waveform observations in the Japan subduction zone require weak scattering (<1.0%) within the slab below 410 km. Combining with previous studies that suggest high heterogeneity level (∼2.5%) at intermediate depth, we conclude that the small-scale intra-slab heterogeneity weakens as slabs subduct. We suggest that the heterogeneities are caused by intra-slab hydrous minerals, and the decrease in their scattering strength with depth reveals processes associated with dehydration of subducting slabs. |
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/342072 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Zhichao Shen,Zhongwen Zhan,Jennifer M. Jackson. Small-scale intra-slab heterogeneity weakens into the mantle transition zone[J]. Geophysical Research Letters,2021. |
APA | Zhichao Shen,Zhongwen Zhan,&Jennifer M. Jackson.(2021).Small-scale intra-slab heterogeneity weakens into the mantle transition zone.Geophysical Research Letters. |
MLA | Zhichao Shen,et al."Small-scale intra-slab heterogeneity weakens into the mantle transition zone".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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