| Title | Seismic evidence for global basalt accumulation in the mantle transition zone |
| Author | |
| Corresponding Author | Yu，Chunquan |
| Publication Years | 2023-06-02
|
| DOI | |
| Source Title | |
| ISSN | 2375-2548
|
| EISSN | 2375-2548
|
| Volume | 9Issue:22 |
| Abstract | The mantle's compositional structure reflects the thermochemical evolution of Earth. Yet, even the radial average composition of the mantle remains debated. Here, we analyze a global dataset of shear and compressional waves reflecting off the 410- and 660-km discontinuities that is 10 times larger than any previous studies. Our array analysis retrieves globally averaged amplitude-distance trends in SS and PP precursor reflectivity from which we infer relative wavespeed and density contrasts and associated mantle composition. Our results are best matched by a basalt-enriched mantle transition zone, with higher basalt fractions near 660 (~40%) than 410 (~18-31%). These are consistent with mantle-convection/plate-recycling simulations, which predict that basaltic crust accumulates in the mantle transition zone, with basalt fractions peaking near the 660. Basalt segregation in the mantle transition zone also implies that the overall mantle is more silica enriched than the often-assumed pyrolitic mantle reference composition. |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| Important Publications | NI Journal Papers
|
| SUSTech Authorship | First
; Corresponding
|
| Funding Project | Guangdong Provincial Key Laboratory of Urology[2022B1212010002];National Natural Science Foundation of China[42174058];National Natural Science Foundation of China[92155307];
|
| WOS Research Area | Science & Technology - Other Topics
|
| WOS Subject | Multidisciplinary Sciences
|
| WOS Accession No | WOS:001009814700008
|
| Publisher | |
| Scopus EID | 2-s2.0-85160786033
|
| Data Source | Scopus
|
| Citation statistics |
Cited Times [WOS]:0
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/559943 |
| Department | Department of Earth and Space Sciences |
| Affiliation | 1.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518055,China 2.Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology,Southern University of Science and Technology,Shenzhen,518055,China 3.Department of Earth Science and Engineering,Imperial College London,London,SW7 2BP,United Kingdom 4.Department of Earth,Atmospheric and Planetary Sciences,Massachusetts Institute of Technology,Cambridge,02139,United States |
| First Author Affilication | Department of Earth and Space Sciences; Southern University of Science and Technology |
| Corresponding Author Affilication | Department of Earth and Space Sciences; Southern University of Science and Technology |
| First Author's First Affilication | Department of Earth and Space Sciences |
| Recommended Citation GB/T 7714 |
Yu，Chunquan,Goes，Saskia,Day，Elizabeth A.,et al. Seismic evidence for global basalt accumulation in the mantle transition zone[J]. Science Advances,2023,9(22).
|
| APA |
Yu，Chunquan,Goes，Saskia,Day，Elizabeth A.,&van der Hilst，Robert D..(2023).Seismic evidence for global basalt accumulation in the mantle transition zone.Science Advances,9(22).
|
| MLA |
Yu，Chunquan,et al."Seismic evidence for global basalt accumulation in the mantle transition zone".Science Advances 9.22(2023).
|
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