Computer Science
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..40..141w&link_type=abstract
Earth and Planetary Science Letters, vol. 40, no. 2, July 1978, p. 141-150.
Computer Science
14
Cooling, Iron Meteorites, Meteoritic Composition, Chemical Composition, Close Packed Lattices, Computerized Simulation, Concentration (Composition), Diffusion Coefficient, Energy Dissipation, Heat Transfer, Igneous Rocks, Meteoritic Microstructures, Nickel Alloys, Phase Diagrams, Rates (Per Time), Thermal Conductivity, Thermodynamics, Iron, Meteorites, Iron Meteorites, Cooling, Kamacite, Taenite, Temperatures, Nickel, Diffusion, Phase Diagrams
Scientific paper
Cooling rates of six group IVA iron meteorites were estimated by a taenite central Ni concentration-taenite half-width method. Calculated cooling rates range from 13 to 25 C/Myr, with an average of 20 C/Myr. No correlation between cooling rate and bulk Ni content is observed, and the data appear to be consistent with a uniform cooling rate as expected from an igneous core origin. This result differs from previous studies reporting a wide range in cooling rates that were strongly correlated with bulk Ni content. The differences result mainly from differences in the phase diagram and the selected diffusion coefficients. Cooling rates inferred from taenite Ni concentrations at the interface with kamacite are consistent with those based on taenite central Ni content.
Wasson John T.
Willis James J.
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