The magnetization of carbonaceous meteorites

Details The magnetization of carbonaceous meteorites The magnetization of carbonaceous meteorites

Aug 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974phdt.........1h&link_type=abstract

Ph.D. Thesis Texas A&M Univ., College Station. Nuclear-Geochemistry Dept. of Chemistry.

Computer Science

1

Carbonaceous Meteorites, Magnetization, Thermomagnetic Effects, Magnetite, Oxidation, Oxygen, Troilite, Ureilites

Scientific paper

Alternating field demagnetization experiments have been conducted on representative samples of the carbonaceous meteorites (carbonaceous chondrites and ureilites). The results indicate that many, if not all, of these meteorites possess an intense and stable magnetic moment of extraterrestrial origin. Thermomagnetic analyses have been conducted on samples of all known carbonaceous meteorites. In addition to yielding quantitative magnetite estimates, these studies indicate the presence of a thermally unstable component, troilite, which reacts with gaseous oxygen to form magnetite. It is proposed that the magnetite found in some carbonaceous chondrites resulted from the oxidation of troilite during the early history of the solar system. The formation of pyrrhotite is expected as a natural consequence of magnetite formation via this reaction. Consideration is given to the implications of magnetite formation on paleointensity studies.

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