2020 Fiscal Year Research-status Report
Mapping Water in the Deep Mantle
| Project/Area Number |
20K04126
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
ハウザー クリスティーン 東京工業大学, 地球生命研究所, 特任助教 (20723737)
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| Co-Investigator(Kenkyū-buntansha) |
土屋 旬 愛媛大学, 地球深部ダイナミクス研究センター, 准教授 (00527608)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | Earth composition / mantle transition zone / hydrous minerals / global seismology / molecular dynamics |
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| Outline of Annual Research Achievements |
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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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
The shutdown of schools and travel due to COVID-19 inhibited our research progress, but we expect this situation to improve over the next fiscal year.
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| Strategy for Future Research Activity |
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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| Causes of Carryover |
Funds that were allocated for travel in the past fiscal year have been carried over for use in the next fiscal year.
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