Faculté des Sciences
Faculté des Sciences

Effects of the meteorite and comet impacts on the degassing of volatile contained in martian heterogeneous regolith

Piette, Aurélien ULiège
Promotor(s) : Dehant, Véronique ; Jehin, Emmanuel ULiège
Date of defense : 6-Sep-2021/7-Sep-2021 • Permalink :
Title : Effects of the meteorite and comet impacts on the degassing of volatile contained in martian heterogeneous regolith
Translated title : [fr] Effet des impacts de comètes et de météorites sur le dégazage de volatile contenu dans la régolithe hétérogène de Mars
Author : Piette, Aurélien ULiège
Date of defense  : 6-Sep-2021/7-Sep-2021
Advisor(s) : Dehant, Véronique 
Jehin, Emmanuel ULiège
Committee's member(s) : Karatekin, Ozgur 
Bonfond, Bertrand ULiège
Javaux, Emmanuelle ULiège
Language : English
Number of pages : 69
Keywords : [en] Mars
[en] Impacts
[en] methane
[en] Regolith
[en] model
Discipline(s) : Physical, chemical, mathematical & earth Sciences > Space science, astronomy & astrophysics
Research unit : Royal Observatory of Belgium
Target public : Researchers
Professionals of domain
General public
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en sciences spatiales, à finalité spécialisée
Faculty: Master thesis of the Faculté des Sciences


[en] The goal of this master’s thesis iw to better understand Mars and its complex processes and more specifcally to understand if the heterogeneity of the martian regolith may impact the degassing of volatile due to small impactors.To do so the increase of temperature as a result of impact energy is theoretically and numerically investigated. A modelisation of the increase of impact-induced temperature is proposed with an analytcial method : the Murnaghan equation of state.Then a comparison with a hydrocode (numerical method) is considered. To study the environmental effect, the evolution of the temperature following an impact for a martian year is calculated using the Crank-Nicholson method. The effect of the heterogeneity of the martian subsurface is then studied with the use of different plausible scenarii of different locations of interest on Mars. Finally, the results for each scenarii are compared with the depth of the ice table or the clathrate stability zone to assess its destabilization and thus degassing of methane.



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  • Piette, Aurélien ULiège Université de Liège > Master sc. spatiales, à fin.


Committee's member(s)

  • Karatekin, Ozgur ORB
  • Bonfond, Bertrand ULiège Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
    ORBi View his publications on ORBi
  • Javaux, Emmanuelle ULiège Université de Liège - ULiège > Département de géologie > Early Life Traces & Evolution-Astrobiology
    ORBi View his publications on ORBi
  • Total number of views 47
  • Total number of downloads 177

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