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Scheller EL, Swindle C, Grotzinger J, et al. Formation of Magnesium Carbonates on Earth and Implications for Mars. J Geophys Res Planets. 2021;126(7):e2021JE006828doi: 10.1029/2021je006828.
Scheller, E. L., Swindle, C., Grotzinger, J., Barnhart, H., Bhattacharjee, S., Ehlmann, B. L., Farley, K., Fischer, W. W., Greenberger, R., Ingalls, M., Martin, P. E., Osorio-Rodriguez, D., & Smith, B. P. (2021). Formation of Magnesium Carbonates on Earth and Implications for Mars. Journal of geophysical research. Planets, 126(7), e2021JE006828. https://doi.org/10.1029/2021je006828
Scheller, Eva L, et al. "Formation of Magnesium Carbonates on Earth and Implications for Mars." Journal of geophysical research. Planets vol. 126,7 (2021): e2021JE006828. doi: https://doi.org/10.1029/2021je006828
Scheller EL, Swindle C, Grotzinger J, Barnhart H, Bhattacharjee S, Ehlmann BL, Farley K, Fischer WW, Greenberger R, Ingalls M, Martin PE, Osorio-Rodriguez D, Smith BP. Formation of Magnesium Carbonates on Earth and Implications for Mars. J Geophys Res Planets. 2021 Jul;126(7):e2021JE006828. doi: 10.1029/2021je006828. Epub 2021 Jun 22. PMID: 34422534; PMCID: PMC8378241.
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J Geophys Res Planets. 2021 Jul;126(7):e2021JE006828. doi: 10.1029/2021je006828. Epub 2021 Jun 22.

Formation of Magnesium Carbonates on Earth and Implications for Mars.

Journal of geophysical research. Planets

Eva L Scheller, Carl Swindle, John Grotzinger, Holly Barnhart, Surjyendu Bhattacharjee, Bethany L Ehlmann, Ken Farley, Woodward W Fischer, Rebecca Greenberger, Miquela Ingalls, Peter E Martin, Daniela Osorio-Rodriguez, Ben P Smith

Affiliations

  1. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA.
  2. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
  3. Department of Geosciences, Pennsylvania State University, State College, PA, USA.
  4. Geological Sciences Department, University of Colorado Boulder, Boulder, CO, USA.

PMID: 34422534 PMCID: PMC8378241 DOI: 10.1029/2021je006828

Abstract

Magnesium carbonates have been identified within the landing site of the Perseverance rover mission. This study reviews terrestrial analog environments and textural, mineral assemblage, isotopic, and elemental analyses that have been applied to establish formation conditions of magnesium carbonates. Magnesium carbonates form in five distinct settings: ultramafic rock-hosted veins, the matrix of carbonated peridotite, nodules in soil, alkaline lake, and playa deposits, and as diagenetic replacements within lime-and dolostones. Dominant textures include fine-grained or microcrystalline veins, nodules, and crusts. Microbial influences on formation are recorded in thrombolites, stromatolites, crinkly, and pustular laminites, spheroids, and filamentous microstructures. Mineral assemblages, fluid inclusions, and carbon, oxygen, magnesium, and clumped isotopes of carbon and oxygen have been used to determine the sources of carbon, magnesium, and fluid for magnesium carbonates as well as their temperatures of formation. Isotopic signatures in ultramafic rock-hosted magnesium carbonates reveal that they form by either low-temperature meteoric water infiltration and alteration, hydrothermal alteration, or metamorphic processes. Isotopic compositions of lacustrine magnesium carbonate record precipitation from lake water, evaporation processes, and ambient formation temperatures. Assessment of these features with similar analytical techniques applied to returned Martian samples can establish whether carbonates on ancient Mars were formed at high or low temperature conditions in the surface or subsurface through abiotic or biotic processes. The timing of carbonate formation processes could be constrained by

Conflict of interest statement

Conflict of Interest The authors declare no conflicts of interest relevant to this study.

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