Self-Assembled Structures Formed in CO2-Enriched Atmospheres: A Case-Study for Martian Biomimetic Forms

  • Elizabeth Escamilla-Roa* (Corresponding Author)
  • , Maria-Paz Zorzano
  • , Javier Martin-Torres
  • , Claro Ignacio Sainz-Diaz
  • , Julyan H. E. Cartwright
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The aim of this study was to investigate the biomimetic precipitation processes that follow the chemical-garden reaction of brines of CaCl2 and sulfate salts with silicate in alkaline conditions under a Mars-type CO2-rich atmosphere. We characterize the precipitates with Environmental Scanning Electron Microscope micrography, micro-Raman spectroscopy, and X-ray diffractometry. Our analysis results indicate that self-assembled carbonate structures formed with calcium chloride can have vesicular and filamentary features. With magnesium sulfate as a reactant a tentative assignment with Raman spectroscopy indicates the presence of natroxalate in the precipitate. These morphologies and compounds appear through rapid sequestration of atmospheric CO2 by alkaline solutions of silica and salts.

Original languageEnglish
Pages (from-to)863-879
Number of pages17
JournalAstrobiology
Volume22
Issue number7
Early online date25 May 2022
DOIs
Publication statusPublished - 11 Jul 2022

Bibliographical note

Acknowledgments
E.E.-R. acknowledges Rafael Esteso for his help and advice with the experimental setups and photography, Abhilash Vakkada Ramachandran for his help with the Mars Chamber experiment, and Carlos Pimentel for the fruitful discussion about platonic carbonates.

Funding

The authors acknowledge the contribution of the European COST Action CA17120 supported by the EU Framework Programme Horizon 2020 and the Spanish MINECO projects FIS2016-77692-C2 and PCIN-2017-098. M.P.Z. acknowledges the partial support of the Spanish State Research Agency (AEI) Project No. MDM-2017-0737 and of the Spanish Ministry of Science and Innovation project PID2019-104205GB-C21

FundersFunder number
European Commission
COST European Cooperation in Science and TechnologyCA17120
Ministerio de Economía, Comercio y EmpresaFIS2016-77692-C2 , PCIN-2017-098
Agencia Estatal de InvestigaciónMDM-2017-0737
Ministerio de Ciencia e InnovaciónPID2019-104205GB-C21

    Keywords

    • Mars
    • Carbonate minerals
    • Self-assembly
    • Natroxalate
    • Chemical gardens
    • CO2 atmosphere
    • CALCIUM-CARBONATE
    • GALE CRATER
    • MARS
    • CRYSTALLIZATION
    • MINERALS
    • MAGNESIUM
    • DRIVEN
    • TUBES
    • RAMAN
    • LIFE

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