Analytical study of spherules from the site of the Tungusk explosion

Details Analytical study of spherules from the site of the Tungusk explosion Analytical study of spherules from the site of the Tungusk explosion

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989crasm.308.1589j&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II - Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Ter

Physics

3

Bolides, Meteoritic Composition, Spherules, Tungusk Meteorite, Iridium, Meteorite Craters, Micrometeoroids, X Ray Spectroscopy

Scientific paper

A group of 80 magnetic spherules recovered in the vicinity of the site of the Tungusk explosion of June 1908 have been analyzed and compared with Fe-Ni spherules from the steady micrometeoroid flux. Most (90 percent) of the spherules cannot be identified with any known micrometeorite family, and their low average iridium content suggests a terrestrial origin. It is found that only three of the spherules (consisting of a single iron oxide phase) could have been produced by the event, and that the previous studies have overestimated the Tungusk iron debris.

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