No Martian soil component in shergottite meteorites - Archive ouverte HAL Access content directly
Journal Articles Geochimica et Cosmochimica Acta Year : 2014

No Martian soil component in shergottite meteorites

(1) , (2) , (3) , (4) , (4) , (1) , (2) , (2)
1
2
3
4
Jean-Alix J-A Barrat
  • Function : Correspondent author
  • PersonId : 934105

Connectez-vous pour contacter l'auteur
Claire Bollinger
  • Function : Author
  • PersonId : 905819
Jessica Langlade
  • Function : Author
Céline C. Liorzou
  • Function : Author
  • PersonId : 905820
Omar Boudouma
Michel Fialin

Abstract

We report on the major and trace element geochemistry of the impact melts contained in some shergottite meteorites. It has been previously proposed that some of these impact melts formed from a mixture of the host rock and a Martian soil component (e.g., Rao et al., 1999) or from partially weathered portions of the host rock (Chennaoui Aoudjehane et al., 2012). Our results contradict both of these theories. Trace element abundances of a glass pod from the EETA 79001A meteorite are identical to those of the host lithology, and indicate that no additional component is required in this case. The impact melts in Tissint share the same trace element features as the host rock, and no secondary phases produced by Martian secondary processes are involved. The light rare earth enrichments displayed by two small samples of Tissint (Chennaoui Aoudjehane et al., 2012) are possibly the result of some contamination of small stones on desert soil before the recovery of the meteorites.
Not file

Dates and versions

insu-00915197 , version 1 (10-12-2013)

Identifiers

Cite

Jean-Alix J-A Barrat, Albert Jambon, L. Ferrière, Claire Bollinger, Jessica Langlade, et al.. No Martian soil component in shergottite meteorites. Geochimica et Cosmochimica Acta, 2014, 125, pp.23-33. ⟨10.1016/j.gca.2013.09.033⟩. ⟨insu-00915197⟩
125 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More