Physics
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pepi..108..235b&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 108, Issue 3, p. 235-243.
Physics
2
Scientific paper
Low field magnetic susceptibility of 151 tektites from the Australasian strewn field is dominated by paramagnetism of the silicate glass. Ferromagnetic contributions are negligible because the formation of oxides was suppressed during rapid quenching. A few samples from the Central European strewn field show similar properties. Also, susceptibilities calculated from the large number of published geochemical analyses yield similar low susceptibilities. To produce low mass susceptibilities in such a narrow range of 50-100×10-9 m3 kg-1, paramagnetic behaviour and negligible remanence, a target source that is both appropriate and widespread over the Earth's surface is required. Modern marine sediments would appear to fill these requirements. The uniformity of the material, and hence its magnetic properties would be enhanced by the thorough mixing of molten terrestrial sedimentary during vaporization and ejection and its subsequent rapid quenching.
Borradaile Graham J.
Werner Thomas
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