Magnetic Properties Experiments on the Mars Pathfinder Lander: Preliminary Results-Reference-Cited by-同舟云学术

Magnetic Properties Experiments on the Mars Pathfinder Lander: Preliminary Results

Published:1997-12-05 Issue:5344 Volume:278 Page:1768-1770
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Hviid S. F.¹²³,Madsen M. B.¹²³,Gunnlaugsson H. P.¹²³,Goetz W.¹²³,Knudsen J. M.¹²³,Hargraves R. B.¹²³,Smith P.¹²³,Britt D.¹²³,Dinesen A. R.¹²³,Mogensen C. T.¹²³,Olsen M.¹²³,Pedersen C. T.¹²³,Vistisen L.¹²³

Affiliation:

1. S. F. Hviid, M. B. Madsen, H. P. Gunnlaugsson, W. Goetz, J. M. Knudsen, A. R. Dinesen, C. T. Mogensen, M. Olsen, C. T. Pedersen, L. Vistisen, Oersted Laboratory, Niels Bohr Institute for Astronomy, Physics, and Geophysics, University of Copenhagen, Copenhagen, Denmark.

2. R. B. Hargraves, Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.

3. P. Smith and D. Britt, Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.

Abstract

Many of the particles currently suspended in the martian atmosphere are magnetic, with an average saturation magnetization of about 4 A·m 2 /kg (amperes times square meters per kilogram). The particles appear to consist of claylike aggregates stained or cemented with ferric oxide (Fe 2 O 3 ); at least some of the stain and cement is probably maghemite (γ-Fe 2 O 3 ). The presence of the γ phase would imply that Fe 2+ ions leached from the bedrock, passing through a state as free Fe 2+ 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference25 articles.

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