Other
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992e%26psl.109..185m&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 109, no. 1-2, March 1992, p. 185-204.
Other
26
Chondrites, Magnetic Properties, Solar System, Demagnetization, Hysteresis, Magnetic Permeability, Remanence
Scientific paper
An analysis of the magnetic properties of 11 ordinary chondrites (eight LL-chondrites and three L-chondrites) is presented. The samples were repeatedly fragmented and oriented to a common reference direction, natural remanent magnetization (NRM), susceptibility, and anisotropy of susceptibility measured at each stage. The response of some fragments to alternating field demagnetization, thermal demagnetization, isothermal remanent magnetization, and magnetic hysteresis was measured. The orientation of the stable NRM was found to be random, down to a scale of about 1 cu mm. Because the magnetic fabric found in all the samples was continuous in the majority of samples, and the NRM randomly orientated, it is concluded that the magnetic carriers were magnetized before emplacement in the meteorite, and that the meteorites are not finescale breccias. The reservation of the random NRM leads to the preference of hot accretion as the mechanism for producing chondritic textures, as opposed to metamorphic reheating, as this would tend to erase the random magnetization.
Collinson D. W.
Morden S. J.
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