Thermomagnetic analysis of meteorites, 2.C2 chondrites

Details Thermomagnetic analysis of meteorites, 2.C2 chondrites Thermomagnetic analysis of meteorites, 2.C2 chondrites

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975e%26psl..27..101w&link_type=abstract

Earth and Planetary Science Letters, vol. 27, no. 1, Aug. 1975, p. 101-107.

Computer Science

6

Chemical Composition, Chondrites, Iron Oxides, Magnetic Properties, Meteoritic Composition, Thermomagnetic Effects, Chemical Reactions, Magnetite, Nickel, Saturation, Temperature Measurement

Scientific paper

Samples of all eighteen known C2 chondrites have been analyzed thermomagnetically. For eleven of these, initial Fe3O4 content is low (generally less than 1%) and the saturation magnetization-vs.-temperature curves are irreversible. The heating curves show variable and erratic behavior, whereas the cooling curves are similar to that of Fe3O4. The saturation moment after cooling is greater (up to 10 times) than it is initially. This behavior is attributed to the production of magnetite from a thermally unstable phase - apparently FeS. Four of the remaining seven C2 chondrites contain Fe3O4 as the only significant magnetic phase; initial magnetite contents range from 4 to 13%. The remaining three C2 chondrites contain iron or nickel-iron in addition to Fe3O4. These seven C2 chondrites show little evidence of the breakdown of a thermally unstable phase.

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