DEEP-MAPS

Deep Earth Mantle Phase Transition Maps: Studied by Time-Resolved Experiments

CoordinatorTHE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD
Grant period2020-10-01 - 2025-09-30
Funding bodyEuropean Union
Call numberERC-2019-COG
Grant number864877
IdentifierG:(EU-Grant)864877

Note: Processes in Earth's lower mantle govern our planet's inner dynamics and control surface plate tectonics. As such, a quantitative understanding of the physical and chemical properties of the lower mantle is pivotal to model Earth’s dynamic evolution, including the long-term chemical interactions between mantle and atmosphere that are vital to the development of habitability on Earth, and possibly other planets. While seismic tomography is providing increasingly detailed three-dimensional maps of the lower mantle, the interpretation of tomographic models to elucidate key factors such as mantle geochemical heterogeneity or dynamic mantle flow processes has proven to be highly ambiguous. All evidence points to phase transitions being the missing link needed to converge to a consistent interpretation of seismic observations. The same phase transitions also play a key role in governing mantle dynamics. But even fundamental properties, such as the location of major phase transition boundaries in Earth’s mantle, are poorly constrained. This is because the parameter space (pressure-temperature-composition) is huge and experimental measurements at planetary interior conditions are extremely slow. DEEP-MAPS will employ a novel class of time-resolved high-pressure/-temperature experiments that reduce by several orders of magnitude the time for key experiments. This will allow DEEP-MAPS to map lower mantle phase transitions, their impact on physical properties and their seismic signature with practically continuous coverage in relevant pressure-temperature-composition-space. DEEP-MAPS will further probe the time-dependence of phase transitions, transforming our understanding of how to scale from laboratory measurements to geophysical processes. DEEP-MAPS will provide a step-change in our ability to interpret mantle seismic observables and to quantify the geodynamic impact of mantle phase transitions, ultimately leading to a holistic picture of Earth’s deep mantle.
     

Recent Publications

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Iron Content‐Dependence of Ferropericlase Elastic Properties Across the Spin Crossover From Novel Experiments and Machine Learning
Geophysical research letters 51(22), e2024GL111276 () [10.1029/2024GL111276]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Automated processing of X-ray diffraction data from dynamic compression experiments at the Extreme Conditions Beamline of PETRA III
Journal of applied crystallography 57(4), 1217-1228 () [10.1107/S1600576724004114]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Compressibility of ferropericlase at high-temperature: Evidence for the iron spin crossover in seismic tomography
Earth and planetary science letters 618, 118296 - () [10.1016/j.epsl.2023.118296]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext BibTeX | EndNote: XML, Text | RIS

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A MHz X-ray diffraction set-up for dynamic compression experiments in the diamond anvil cell
Journal of synchrotron radiation 30(4), 671 - 685 () [10.1107/S1600577523003910]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X-ray Free-Electron Laser (EuXFEL)
Journal of synchrotron radiation 28(3), 688 - 706 () [10.1107/S1600577521002551]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

All known publications ...
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 Record created 2020-09-09, last modified 2023-02-14



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