A comparison of metallographic cooling rate methods used in meteorites

Details A comparison of metallographic cooling rate methods used in meteorites A comparison of metallographic cooling rate methods used in meteorites

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gecoa..58.1353h&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 58, p. 1353

Computer Science

24

Metallography, Meteoritic Composition, Cooling, Heat Flux, Nickel, Phosphorus, Widmanstatten Structure, Chondrites, Time Temperature Parameter

Scientific paper

The objective of the study was to test the postulate that cooling rates acquired from metal grains in chondrites are consistent with those from iron meteorites. Cooling rates were obtained by using the central Ni content method. The cooling rates obtained form Windmanstaetten structures and metal grains in chondritic inclusions of the same meteorite are found to be consistent, with uncertainties in the best data being +/- 10 K/Ma. Cooling rates range from 40 to 70 K/Ma in IAB meteorites that contain both grains and Windmanstaetten structures. Cooling rates correlate with Ni content and are lower for Ni-poor meteorites than for Ni-rich ones.

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