Title :

Tardi-magmatic precipitation of Martian Fe/Mg-rich clay minerals via igneous differentiation

Author(s) :

Viennet, J.-C. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Bernard, S. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Le Guillou, Corentin [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Sautter, V. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Schmitt-Kopplin, P. [Auteur]

Beyssac, O. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Pont, S. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Zanda, B. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Hewins, R. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Remusat, L. [Auteur]
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]

Journal title :

Geochemical Perspectives Letters

Abbreviated title :

Geochem. Persp. Let.

Pages :

47-52

Publisher :

European Association of Geochemistry

Publication date :

2020-07

ISSN :

2410-3403

English keyword(s) :

Mars
magmatic precipitation
clay minerals

HAL domain(s) :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Chimie/Matériaux
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre

English abstract : [en]

Mars is seen as a basalt covered world that has been extensively altered through hydrothermal or near surface water-rock interactions. As a result, all the Fe/Mg-rich clay minerals detected from orbit so far have been ...
Show more >Mars is seen as a basalt covered world that has been extensively altered through hydrothermal or near surface water-rock interactions. As a result, all the Fe/Mg-rich clay minerals detected from orbit so far have been interpreted as secondary, i.e. as products of aqueous alteration of pre-existing silicates by (sub)surface water. Based on the fine scale petrographic study of the evolved mesostasis of the Nakhla meteorite, we report here the presence of primary Fe/Mg-rich clay minerals that directly precipitated from a water-rich fluid exsolved from the Cl-rich parental melt of nakhlites during igneous differentiation. Such a tardi-magmatic precipitation of clay minerals requires much lower amounts of water compared to production via aqueous alteration. Although primary Fe/Mg-rich clay minerals are minor phases in Nakhla, the contribution of such a process to Martian clay formation may have been quite significant during the Noachian given that Noachian magmas were richer in H2O. In any case, the present discovery justifies a re-evaluation of the exact origin of the clay minerals detected on Mars so far, with potential consequences for our vision of the early magmatic and climatic histories of Mars.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Matériaux Terrestres et Planétaires

Submission date :

2020-07-08T11:31:25Z
2020-07-18T13:15:36Z
2020-09-01T13:31:12Z