Title :

Early oxidation of the martian crust triggered by impacts

Author(s) :

Deng, Zhengbin [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Moynier, Frédéric [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Villeneuve, Johan [Auteur]
Centre de Recherches Pétrographiques et Géochimiques [CRPG]
Jensen, Ninna [Auteur]
Liu, Deze [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Cartigny, Pierre [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Mikouchi, Takashi [Auteur]
Siebert, Julien [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Agranier, Arnaud [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Chaussidon, Marc [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Bizzarro, Martin [Auteur]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]

Journal title :

Science Advances

Pages :

119791

Publisher :

American Association for the Advancement of Science (AAAS)

Publication date :

2020-10-30

ISSN :

2375-2548

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Géochimie

English abstract : [en]

Despite the abundant geomorphological evidence for surface liquid water on Mars during the Noachian epoch (>3.7 billion years ago), attaining a warm climate to sustain liquid water on Mars at the period of the faint young ...
Show more >Despite the abundant geomorphological evidence for surface liquid water on Mars during the Noachian epoch (>3.7 billion years ago), attaining a warm climate to sustain liquid water on Mars at the period of the faint young Sun is a long-standing question. Here, we show that melts of ancient mafic clasts from a martian regolith meteorite, NWA 7533, experienced substantial Fe-Ti oxide fractionation. This implies early, impact-induced, oxidation events that increased by five to six orders of magnitude the oxygen fugacity of impact melts from remelting of the crust. Oxygen isotopic compositions of sequentially crystallized phases from the clasts show that progressive oxidation was due to interaction with an 17O-rich water reservoir. Such an early oxidation of the crust by impacts in the presence of water may have supplied greenhouse gas H2 that caused an increase in surface temperature in a CO2-thick atmosphere.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Earth - Planets - Universe: observation, modeling, transfer
Université Sorbonne Paris Cité
Origine des chondrites: une approche croisée entre simulations numériques et analyses en laboratoire

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL