Other
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.1043c&link_type=abstract
(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,
Other
17
Achondrites, Magnetic Properties, Meteoritic Composition, Paleomagnetism, Remanence, Asteroids, High Field Magnets, Hysteresis, Magnetic Measurement, Mars (Planet), Paramagnetism, Petrology, Thermomagnetic Effects, Meteorites, Stony Meteorites, Achondrites, Shergotty, Samples, Meteorite, Snc Meteorites, Shergottites, Nakhlites, Chassigny, Magnetic Properties, Hysteresis, Antarctic Meteorites, Nakhla, Zagami, Eeta79001, Alha79005, Eet Meteorites, Alh Meteorites, Governador Valadares, Thermomagnetism, Oxidati
Scientific paper
The results of a study of basic magnetic properties of meteorites within the SNC group, including the four known shergottites and two nakhlites, are presented. An estimate is made of the strength of the magnetic field which produced the remanent magnetization of the Shergotty meteorite, for the purpose of constraining the choices for the parent body of these SNC meteorites. Remanence measurements in several subsamples of Shergotty and Zagami meteorites reveal a large variation in intensity that does not seem to be related to the abundance of remanence carriers. The other meteorites carry only weak remanence, suggesting weak magnetizing fields as the source of their magnetic signal. A paleointensity experiment on a weakly magnetized subsample of Shergotty revealed a low temperature component of magnetization acquired in a field of 2000 gammas, and a high temperature component reflecting a paleofield strength of between 250 and 1000 gammas. The weak field environment that these meteorites seem to reflect is consistent with either a Martian or asteroidal origin, but inconsistent with a terrestrial origin.
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