Abstract
A KNOWLEDGE of the response of iron meteorites to heat treatment is necessary for the understanding of such specimens as Kamkas1 which appear to have suffered partial destruction of their Widmanstatten structures by cosmic heat treatment. Kasé2 has published evidence to show that for the medium octahedrite Sacramento Mountains the nickel-rich tænite is still clearly visible after a heat treatment of 20 min at 1,000° C or 3 min at 1,200° C. Even after 4 min at 1,300° C there remains a faint trace of nickel enrichment which marks the previous location of a tænite area.
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References
Axon, H. J., The Metallurgist, 322 (1961).
Kasé, T., Sci. Rep. Tôhoku Imp. Univ., 537 (1925).
Perry, S. H., U.S. Nat. Mus. Bull., 184, Plate 74, Fig. 4 (1944).
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AXON, H. Destruction of the Widmanstatten Structure in Iron Meteorites by Laboratory Heat Treatment. Nature 197, 1291 (1963). https://doi.org/10.1038/1971291a0
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DOI: https://doi.org/10.1038/1971291a0
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