Cooling rate based on schreibersite growth for the Emery mesosiderite

Computer Science

Scientific paper

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Geochemistry, Iron Meteorites, Metamorphism (Geology), Schreibersite, Stony Meteorites, Computerized Simulation, Cooling, Kamacite, Nickel, Planetary Evolution, Cooling, Breccias, Emery Meteorite, Temperatures, Thermal History, Mineralogy, Schreibersite, Origin, Chemical Composition, Silicates, Taenite, Simulation, Mesosiderite, Nickel, Kamacite, Stony Meteorites, Iron Meteorites, Metals

Scientific paper

Computer simulation of diffusion-controlled growth of the large Ni-rich grains of schreibersite found in the Emery mesosiderite indicates that exsolution from kamacite occurred during cooling at the rate of 0.1 C/Myr. This finding agrees with the mesosiderite cooling rate determined by Powell (1969) from taenite-kamacite data. The cooling rate is the lowest found for any meteorite group, and implications for the cooling history, with a possibility of reheating, are considered. The procedure for computing a family of cooling rate curves is based on Randich's (1975) method.

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