Physics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983polre..30..378l&link_type=abstract
(National Institute of Polar Research, Symposium on Antarctic Meteorites, 8th, Tokyo, Japan, Feb. 17-19, 1983) National Institut
Physics
Magnetic Properties, Meteorites, Oxidation, Thermal Analysis, Thermogravimetry, Argon, Chromites, Petrology, Troilite, Weathering
Scientific paper
A thermoanalytic study was made of a number of meteorites to obtain differential thermal analysis (DTA) and thermogravimetric (TG) curves for the Yamato-74013 and -74010 diogenites. Small lithic fragments (blebs) and fines were taken for samples, some of them weathered. Heating both in air and in oxidation-suppressing argon was done up to 1200 C, though analysis was limited to the interval up to 700 C. The major features on the DTA curves were found to originate from oxidation of troilite to pyrrhotite and magnetite, being followed by further partial oxidation of magnetite to maghemite and hematite. The thermoanalytical and thermomagnetic data were shown to be consistent, though there is the possibility that thermal effects interfered with the magnetic properties of minerals. The similarity of the thermoanalytical curves for both diogenites examined lends support to the view that they came from a single fall.
Grodzinski Andrzej
Lang Benjamin
Stoch Leszek
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