Magnetic properties of low-petrologic grade non-carbonaceous chondrites

Details Magnetic properties of low-petrologic grade non-carbonaceous chondrites Magnetic properties of low-petrologic grade non-carbonaceous chondrites

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982polre..25..260s&link_type=abstract

(Symposium on Antarctic Meteorites, 7th, Tokyo, Japan, Feb. 19, 20, 1982) National Institute of Polar Research, Memoirs, Special

Mathematics

Logic

3

Meteorites, Antarctic Meteorites, Magnetic Properties, Petrology, Chondrites

Scientific paper

Magnetic properties and paleointensities are reported for several low-petrologic-grade noncarbonaceous chondrites. Enstatite chondrites are far more magnetic than others and record ancient fields of 7-16 Oe. Abee has nearly random NRM in clasts and matrix samples, suggesting preaccretional remanence. Indarch and Yamato-691 record high fields, but have a single direction of magnetization, so that it cannot be determined whether the magnetic record is of pre- or postaccretional origin. Bjurbole, Chainpur, Mezo Madaras, and Yamato-74191 have random (and stable) NRM components carried by plessite, indicating possible preaccretional remanence. However, Bjurbole and Mezo Madaras are thought to have been reheated to above 500 C after their accretion, and in that case the random NRM in these chondrites could not be preaccretional.

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