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The diverse planetary ingassing/outgassing paths produced over billions of years of magmatic activity

Gaillard, F. ; Bouhifd, M.A. ; Füri, E. ; Malavergne, V. ; Marrocchi, Y. ; Noack, L. ; Ortensi, G. ; Roskosz, M. ; Vulpius, S., Space Sci. Rev.

The diverse planetary ingassing/outgassing paths produced over billions of years of magmatic activity

Gaillard, F. ; Bouhifd, M.A. ; Füri, E. ; Malavergne, V. ; Marrocchi, Y. ; Noack, L. ; Ortensi, G. ; Roskosz, M. ; Vulpius, S.

Space Science Reviews, 2021, 217, 22

Abstract :

The C-H-O-N-S elements that constitute the outgassed atmosphere and exosphere have likely been delivered by chondritic materials to the Earth during planetary accretion and subsequently processed over billions of years of planetary differentiation. Although these elements are generally considered to be volatile, a large part of the accreted C-HO-N-S on Earth must have been sequestered in the core and mantle, with the remaining part concentrated at the Earth’s surface (exosphere : atmosphere+ocean+crust). The likely reason for this is that, depending on the prevailing pressure (P), temperature (T) and oxidation state (oxygen fugacity, fO2) in the planet’s interior, the C-H-O-N-S elements can behave as siderophile, lithophile, refractory, magmatophile, or atmophile. It is not clear if these elements might be sequestered in the interiors of planets elsewhere, since the governing parameters of P-T-fO2 during the diverse magmatic processes controlling magmatic differentiation vary greatly over time and from planet to planet. The magma ocean outgassed the first atmosphere, which was probably also the largest in terms of mass, but its nature and composition remain poorly known. Meanwhile, a significant, but unknown, part

Voir en ligne : https://doi.org/10.1007/s11214-021-...




publié mardi 16 février 2021