| 研究実績の概要 |
The goal of the project is to combine seismology and mineral physics to examine the distribution of water in the Earth's deep mantle. We examine water distribution to understand Earth's history driven by plate tectonics. Publications: Houser et al., Discriminating lower mantle composition,PEPI, 2020 examines mantle composition; Foley, Houser, Noack, and Tosi, The Heat Budget of Rocky Planets book chapter in Planetary Diversity in AAS IOP Astronomy; Thompson, Campbell, and Tsuchiya, Elastic properties of the pyrite‐type FeOOH-AlOOH system from first principles calculations, Geochem. Geophys. Geosys., 2021 examines elastic properties of hydrous deep mantle minerals.
Meetings: JpGU, Organized global online workshop: Feedbacks Between Mantle Composition, Structure, and Evolution
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| 今後の研究の推進方策 |
Our research goals and plans remain similar to that described in the original proposal. We are examining the seismic structure of the mantle transition zone, both the shear velocity patterns and the high and low topography of the 410 km and 660 km seismic discontinuities. Meanwhile we are also expanding the ab initio mineral physics calculations to the higher temperatures of the Earth's deep mantle. While we were not able to travel in the past year, we hope to meet and make further progress over the next year. We are preparing a manuscript that explores the water storage capacity of rocky planets and the fate of water in rocky planets as they grow more massive than Earth.
Manuscripts in review: Nature Communications - deep mantle seismic patterns; EPSL nitrogen cycling and Earth evolution.
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