Magnetic Properties Experiments on the Mars Pathfinder Lander: Preliminary Results
Open accessAbstract
Many of the particles currently suspended in the martian atmosphere are magnetic, with an average saturation magnetization of about 4 A. m2/kg (amperes times square meters per kilogram). The particles appear to consist of claylike aggregates stained or cemented with ferric oxide (Fe2O3); at least some of the stain and cement is probably maghemite (gamma-Fe2O3). The presence of the gamma phase would imply that Fe2+ ions leached from the bedrock, passing through a state as free Fe2+ ions dissolved in liquid water. These particles could be a freeze-dried precipitate from ground water poured out on the surface. An alternative is that the magnetic particles are titanomagnetite occurring in palagonite and inherited directly from a basaltic precursor.
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The hypothesis that iron existed in the aqueous Fe2+ state on Mars earlier in its history may be supported by the Mars Pathfinder magnetic properties experiment.
“Indeed, the hypothesis that iron existed in the aqueous Fe 2+ state on Mars earlier in its history (which implies very low oxygen levels) may be supported by the Mars Pathfinder magnetic properties experiment [Hviid et al., 1997].”
From A chemical model for evaporites on early Mars: Possible sedimentary tracers of the early climate and implications for exploration (1999) · cites this paper as Hviid et al., 1997
Cites
Soil mineralogy and chemistry on Mars: Possible clues from salts and clays in SNC meteorites
Gooding, J. L. (1992) · Icarus · doi:10.1016/0019-1035(92)90168-7 · Cited by 232 · see citing works
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Catling, D. C. (1999) · Journal of Geophysical Research: Planets · doi:10.1029/1998je001020 · Cited by 148 · see citing works
- Authors
- Hviid, S. F., Madsen, M. B., Gunnlaugsson, H. P., Goetz, W., Knudsen, J. M., Hargraves, R. B., Smith, P., Britt, D., Dinesen, A. R., Mogensen, C. T., Olsen, M., Pedersen, C. T., & Vistisen, L.
- Affiliations
- University of Copenhagen (DK)
- Venue
- Science
- Published
- 1997-12-05
- Volume
- 278
- Issue
- 5344
- Pages
- 1768-1770
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2146994550
- Cited by
- 113
- References
- 1
- Citations by year
- 2025: 1 · 2024: 1 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 1 · 2012: 3
- FWCI
- 14.02
- Type
- journal article
- Language
- en
- Open access
- Licence
- cc-by
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- GoeScholar The Publication Server of the Georg-August-Universität Göttingen (Georg-August-Universität Göttingen) (submittedVersion, cc-by)
- Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Geomagnetism and Paleomagnetism Studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
- Keywords
- Mars Pathfinder, magnetic particles, Mars atmosphere, saturation magnetization, ferric oxide, maghemite, titanomagnetite, palagonite, clay aggregates, groundwater leaching
- MeSH terms
- Atmosphere, Extraterrestrial Environment, Ferric Compounds, Iron, Magnetics, Minerals, Oxides, Water, Silicates, Mars, Ferrosoferric Oxide
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