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DOI | 10.1029/2021GL095509 |
Impact of the Juan Fernandez ridge on the Pampean flat subduction inferred from full waveform inversion | |
Yajian Gao; Xiaohui Yuan; Benjamin Heit; Frederik Tilmann; Dirk-Philip van Herwaarden; Solvi Thrastarson; Andreas Fichtner; Bernd Schurr | |
2021-10-16 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | A new seismic model for crust and upper mantle of the south Central Andes is derived from full waveform inversion, covering the Pampean flat subduction and adjacent Payenia steep subduction segments. Focused crustal low-velocity anomalies indicate partial melts in the Payenia segment along the volcanic arc, whereas weaker low-velocity anomalies covering a wide zone in the Pampean segment are interpreted as remnant partial melts. Thinning and tearing of the flat Nazca slab is inferred from gaps in the slab along the inland projection of the Juan-Fernandez-Ridge. A high-velocity anomaly in the mantle below the flat slab is interpreted as relic Nazca slab segment, which indicates an earlier slab break-off triggered by the buoyancy of the Juan-Fernandez-Ridge during the flattening process. In Payenia, large-scale low-velocity anomalies atop and below the re-steepened Nazca slab are associated with the re-opening of the mantle wedge and sub-slab asthenospheric flow, respectively. |
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/340072 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Yajian Gao,Xiaohui Yuan,Benjamin Heit,et al. Impact of the Juan Fernandez ridge on the Pampean flat subduction inferred from full waveform inversion[J]. Geophysical Research Letters,2021. |
APA | Yajian Gao.,Xiaohui Yuan.,Benjamin Heit.,Frederik Tilmann.,Dirk-Philip van Herwaarden.,...&Bernd Schurr.(2021).Impact of the Juan Fernandez ridge on the Pampean flat subduction inferred from full waveform inversion.Geophysical Research Letters. |
MLA | Yajian Gao,et al."Impact of the Juan Fernandez ridge on the Pampean flat subduction inferred from full waveform inversion".Geophysical Research Letters (2021). |
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