New magnetic results from Allende C3/V/

Details New magnetic results from Allende C3/V/ New magnetic results from Allende C3/V/

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pepi...26..134w&link_type=abstract

(International Association of Geomagnetism and Aeronomy, Symposium on Rock Magnetism of Fine Particles, Canberra, Australia, Dec

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Carbonaceous Chondrites, Magnetic Properties, Meteoritic Composition, Thermomagnetic Effects, Demagnetization, Low Temperature, Metastable State, Microstructure, Remanence, Saratov Meteorite, Bjurbole Meteorite, Chainpur Meteorite, Techniques, Barwell Meteorite, Allegan Meteorite, Bruderheim Meteorite, Experiments, Beenhan Meteorite, Modoc Meteorite, Atwood Meteorite, Procedure, Data, Claytonsville Meteorite, Appley Bridge Meteorite, Texture, Coercivity, Meteorites, Allende Meteorite, Magnetic Properties, P

Scientific paper

Thermomagnetic analyses of Allende C3(V) suggest that magnetic phases contributing about 15% to saturation magnetization with transition temperatures not greater than 320 C, also contribute about 90% to natural remanence (NRM) and about 80% to the saturation isothermal remanence (SIRM). Phases carrying the dominating part of of the NRM are found to be intergrown, magnetically interacting, and thermally unstable, beginning at temperatures as low as 50 C. The ratio of the NRM/SIRM ranges from 0.004 to 0.006 for the bulk meteorite and from 0.0004 to 0.005 for chondrules of all sizes. The remanent coercive force behavior suggests coexisting magnetic phases with differing Curie points or with the low temperature transitions being due to transformation of a thermally metastable phase.

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