Thermochemistry of the Mantle Transition Zone Beneath the Western Pacific
Waszek, Lauren, Anandawansha, Rashni, Sexton, Justin, and Tauzin, Benoit (2024) Thermochemistry of the Mantle Transition Zone Beneath the Western Pacific. Geophysical Research Letters, 51 (18). e2024GL110852.
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Abstract
The Earth's mantle transition zone has significant control on material flux between upper and lower mantle, thus constraining its properties is imperative to understand dynamic processes and circulation patterns. Global seismic data sets to study the transition zone typically display highly uneven spatial distribution. Therefore, complementary geometries are essential to improve knowledge of physical structures, thermochemistry, and impact on convection. Here, we present a new automated approach utilizing machine learning to analyze large seismic data sets, and derive high‐resolution maps of transition zone discontinuity properties. Seismic measurements from ScSScS precursors are integrated with mineralogical modeling to constrain thermochemistry of the western Pacific subduction zone. Our models map recent subduction patterns through the transition zone, indicating stagnation of slabs and accumulation of basalt at its base, and interaction between stagnant slabs and plumes. These results suggest that the thermochemical properties of upper mantle discontinuities can provide high‐resolution images of mantle circulation patterns.
| Item ID: | 84927 |
|---|---|
| Item Type: | Article (Research - C1) |
| ISSN: | 1944-8007 |
| Copyright Information: | © 2024. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Funders: | Australian Research Council (ARC) |
| Projects and Grants: | ARC DE170100329 |
| Date Deposited: | 18 Mar 2025 22:42 |
| FoR Codes: | 37 EARTH SCIENCES > 3706 Geophysics > 370609 Seismology and seismic exploration @ 60% 37 EARTH SCIENCES > 3706 Geophysics > 370608 Petrophysics and rock mechanics @ 30% 37 EARTH SCIENCES > 3706 Geophysics > 370604 Geodynamics @ 10% |
| SEO Codes: | 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280107 Expanding knowledge in the earth sciences @ 100% |
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