Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001

Carles E. Moyano-Cambero, Josep M. Trigo-Rodríguez, M. Isabel Benito, Jacinto Alonso-Azcárate, Martin R. Lee, Narcís Mestres, Marina Martínez-Jiménez, Javier Martin-Torres, Jordi Fraxedas

Research output: Contribution to journalArticle

Abstract

Martian meteorites can provide valuable information about past environmental conditions on Mars. Allan Hills 84001 formed more than 4 Gyr ago, and owing to its age and long exposure to the Martian environment, and this meteorite has features that may record early processes. These features include a highly fractured texture, gases trapped during one or more impact events or during formation of the rock, and spherical Fe-Mg-Ca carbonates. In this study, we have concentrated on providing new insights into the context of these carbonates using a range of techniques to explore whether they record multiple precipitation and shock events. The petrographic features and compositional properties of these carbonates indicate that at least two pulses of Mg- and Fe-rich solutions saturated the rock. Those two generations of carbonates can be distinguished by a very sharp change in compositions, from being rich in Mg and poor in Fe and Mn, to being poor in Mg and rich in Fe and Mn. Between these two generations of carbonate is evidence for fracturing and local corrosion.

Original languageEnglish
Pages (from-to)1030-1047
Number of pages18
JournalMeteoritics and Planetary Science
Volume52
Issue number6
DOIs
Publication statusPublished - Jun 1 2017
Externally publishedYes

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carbonates
carbonate
rocks
SNC meteorites
Martian meteorite
fracturing
meteorites
rock
meteorite
mars
Mars
corrosion
textures
texture
shock
environmental conditions
pulses
gases
gas

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

Cite this

Moyano-Cambero, C. E., Trigo-Rodríguez, J. M., Benito, M. I., Alonso-Azcárate, J., Lee, M. R., Mestres, N., ... Fraxedas, J. (2017). Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001. Meteoritics and Planetary Science, 52(6), 1030-1047. https://doi.org/10.1111/maps.12851

Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001. / Moyano-Cambero, Carles E.; Trigo-Rodríguez, Josep M.; Benito, M. Isabel; Alonso-Azcárate, Jacinto; Lee, Martin R.; Mestres, Narcís; Martínez-Jiménez, Marina; Martin-Torres, Javier; Fraxedas, Jordi.

In: Meteoritics and Planetary Science, Vol. 52, No. 6, 01.06.2017, p. 1030-1047.

Research output: Contribution to journalArticle

Moyano-Cambero, CE, Trigo-Rodríguez, JM, Benito, MI, Alonso-Azcárate, J, Lee, MR, Mestres, N, Martínez-Jiménez, M, Martin-Torres, J & Fraxedas, J 2017, 'Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001', Meteoritics and Planetary Science, vol. 52, no. 6, pp. 1030-1047. https://doi.org/10.1111/maps.12851
Moyano-Cambero CE, Trigo-Rodríguez JM, Benito MI, Alonso-Azcárate J, Lee MR, Mestres N et al. Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001. Meteoritics and Planetary Science. 2017 Jun 1;52(6):1030-1047. https://doi.org/10.1111/maps.12851
Moyano-Cambero, Carles E. ; Trigo-Rodríguez, Josep M. ; Benito, M. Isabel ; Alonso-Azcárate, Jacinto ; Lee, Martin R. ; Mestres, Narcís ; Martínez-Jiménez, Marina ; Martin-Torres, Javier ; Fraxedas, Jordi. / Petrographic and geochemical evidence for multiphase formation of carbonates in the Martian orthopyroxenite Allan Hills 84001. In: Meteoritics and Planetary Science. 2017 ; Vol. 52, No. 6. pp. 1030-1047.
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