Ortenzi, G. and Sohl, F. and Noack, L. (2018) Volatile degassing and chemical speciation of the C-O-H system in the Earth Magma Ocean scenario. 7th Joint Workshop on High Pressure, Planetary, and Plasma Physics, 2018-10-10 - 2018-10-12, Berlin, Germany.
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Abstract
During the early phase of its evolution the Earth was likely characterized by the presence of a magma ocean or several large magma ponds. In this period there was a strong interaction between the interior differentiation process, the silicate melt phase and the atmosphere. The aim of this research is to investigate the degassing of volatiles in the C-O-H system in the presence of a magma ocean and the subsequent development of the early Earth's atmosphere. The volatile outgassing and the chemical speciation were investigated throughout numerical model simulations. Specifically, we analyze the volatile transition from the mantle to the atmosphere by using the equilibrium and mass balance method. The most representative reactions for the outgassing process are simulated at pressures, temperatures and redox states which are characteristic for the magma ocean scenario. The gas chemical speciation is deeply influenced by both the thermodynamic properties and the redox state. In a reduced ambient and for low temperatures the main gas species are: CO, CH4 and H2. On the other hand in oxidizing condition the principal gas species are H2O and CO2. In addition, the pressure played a central role during the evolution of the magma ocean and the crust formation. The pressure has a strong effect on the solubility of the gas phases within the silicate melt and the related availability of outgassed volatile species. Lastly, considering an extension of the present scope, this analytical technique has the potential also to characterize the volatile behavior of planetary bodies subject to high internal pressures such as massive solid exoplanets.
Item URL in elib: | https://elib.dlr.de/122603/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | Volatile degassing and chemical speciation of the C-O-H system in the Earth Magma Ocean scenario | ||||||||||||
Authors: |
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Date: | 11 October 2018 | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Early Earth, magma ocean, volcanic degassing, chemical speciation, C-O-H system. | ||||||||||||
Event Title: | 7th Joint Workshop on High Pressure, Planetary, and Plasma Physics | ||||||||||||
Event Location: | Berlin, Germany | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 2018-10-10 - 2018-10-12 | ||||||||||||
Organizer: | DLR Institut für Planetenforschung | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Space | ||||||||||||
HGF - Program Themes: | Space Science and Exploration | ||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||
DLR - Program: | R EW - Erforschung des Weltraums | ||||||||||||
DLR - Research theme (Project): | R - Vorhaben Exploration des Sonnensystems | ||||||||||||
Location: | Berlin-Adlershof | ||||||||||||
Institutes and Institutions: | Institute of Planetary Research > Planetary Physics | ||||||||||||
Deposited By: | Sohl, Frank | ||||||||||||
Deposited On: | 30 Oct 2018 15:47 | ||||||||||||
Last Modified: | 30 Oct 2018 15:47 |
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