Variations in the chemical and mineralogical composition of rim and plains specimens of the Cañon Diablo meteorite

Mathematics – Logic

Scientific paper

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Scientific paper

Quantitative chemical and modal mineralogical analyses were made on samples representing "rim" and "plains" populations of the Ca on Diablo meteorite. These investigations indicated that the volume per cent of the taenite plus plessite phase, the volume per cent of oxide phase, the total weight per cent nickel and the density are different to a level of significance of 0.05 for each of the populations. Other phases and chemical constituents determined showed no significant differences. The values obtained for the components showing differences were: taenite plus plessite, "rim" 3.98 and "plains" 1.53 vol.%; oxide (lawrencite), "rim" <0.01 and "plains" 3.04 vol. %; nickel, "rim" 7.40 and "plains" 7.10 wt. %; and density, "rim" 7.85 and "plains" 7.81. Diamonds were found only in the "rim" samples.

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