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Fluid impacts in EarTh Accretion

Geochemical and geophysical observations indicate that much of Earth’s mass was accreted during large impacts between planetary embryos already differentiated into a metallic core and a silicate mantle. These collisions played a c... ver más

31/10/2018

THE CHANCELLOR MAS...

183K€

Presupuesto del proyecto: 183K€

Líder del proyecto

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

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Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2018-10-31

MSCA-IF-2015-EF: Marie Skłodowska-Curie Individual F...

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2 Participantes

THE CHANCELLOR MASTERS AND S...

183.45K€ | Lider

GALCHIMIA

154.47K€ | Participante

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Duración del proyecto: 31 meses Fecha Inicio: 2016-03-01
Fecha Fin: 2018-10-31

Líder del proyecto

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 183K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Geochemical and geophysical observations indicate that much of Earth’s mass was accreted during large impacts between planetary embryos already differentiated into a metallic core and a silicate mantle. These collisions played a crucial role in setting the stage for Earth evolution, including the initiation of plate tectonics, the generation of Earth’s magnetic field, and the development of life. Each impact delivered prodigious amounts of energy, melting the projectile and the protoplanet's mantle, and creating an environment where the metallic liquid core of the projectile was released within a molten silicate magma ocean. The fate of the projectile’s core following impact affected the efficiency of chemical equilibration between metal and silicates, and therefore the geochemistry of Earth’s deep interior. Recent studies have provided clues on the physical processes involved, however, major questions remain. For instance, does the projectile’s core remain coherent or does it fragment into drops during the impact ? This project includes the first analog fluid mechanics experiments on large impacts that formed the Earth, and combines them with numerical simulations and theory. Complementary to simulations, experiments can produce turbulence, as expected during Earth accretion. Regime diagrams and scaling laws on turbulent mixing obtained from these experiments and simulations will provide key constraints to interpret geochemical observations in terms of accretion time scales and processes. Bridging gaps between fluid mechanics, geodynamics, impact cratering and geochemistry, this project is expected to bring fundamental progress in our understanding of the origin of the Earth, planets, and exoplanets. The researcher’s expertise in Earth accretion and in lab experiments, acquired in the USA, will be reinvested in Europe through this project. Because the work is in fluid mechanics, the host organisation is the ideal place for this project.

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