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SULFURONMERCURY

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Sulfur Cycle on Mercury An experimental and theoretical study

Ongoing measurements of the surface of Mercury by the MESSENGER spacecraft (NASA) indicate that it is covered with basaltic lavas unusually rich in sulfur (up to 4 wt.% S). Such values are significantly higher than those reported... ver más

14/06/2016

LUH

162K€

Presupuesto del proyecto: 162K€

Líder del proyecto

GOTTFRIED WILHELM LEIBNIZ UNIVERSITAET HANNOV... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2016-06-14 No tenemos la información de la convocatoria

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1 Participantes

LUH

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Líder del proyecto

GOTTFRIED WILHELM LEIBNIZ UNIVERSITAET HANNOV... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 162K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Ongoing measurements of the surface of Mercury by the MESSENGER spacecraft (NASA) indicate that it is covered with basaltic lavas unusually rich in sulfur (up to 4 wt.% S). Such values are significantly higher than those reported for any basaltic composition on Earth. Understanding the geochemical cycle of sulfur on Mercury is essential to constrain large-scale processes of planetary differentiation due to volcanic activity, crust-mantle formation, and segregation of a Fe-S-Si core. In this project, the solubility, crystallization and speciation of sulfur in silicate liquids from Mercury will be investigated experimentally and theoretically. Experiments using furnaces and presses will be performed at high temperature (> 1000°C) and for pressure conditions relevant to the Mercury’s crust and mantle (1 bar to 40 kbar). A special design of experimental capsules will be developed to control equilibration under highly reduced conditions similar to those prevailing on Mercury. The key objectives of the project are (1) to precisely estimate the sulfur solubility in Mercury’s silicate liquids as a function of pressure, temperature and oxygen fugacity and (2) to determine phase equilibria and the behavior of sulfur during the crystallization of the Mercury’s basalts. Experimental data and theoretical models produced during this project will allow understanding the processes of Mercury’s differentiation on a global scale as well as determining the likely mantle source of the basalts observed at the surface of the planet. This will be of crucial interest to fully interpret the geochemical and spectral data currently measured by MESSENGER, and those that will be acquired in the near future by the BepiColombo spacecraft of the European Space Agency.

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