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Effect of thermal metamorphic conditions on mineralogy and trace element retention in the Allende meteorite

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Abstract

HEATING carbonaceous chondrite from the Allende meteorite in a low pressure environment causes visible mineralogical alteration at 700–1,000° C but not at T ≤ 600° C. Samples heated for 29 d at 500° C lose trace elements (Bi, In and Tl) more effectively than those similarly heated for 7 d. At 1,000° C with ∼ 10−5 atm initial pressure of O2, H2 or He these elements, Ga and Se are comparatively more completely lost.

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Authors and Affiliations

  1. Department of Chemistry,

    MOHAMMED IKRAMUDDIN

  2. Departments of Chemistry and Geosciences, Purdue University, West Lafayette, Indiana, 47907

    MICHAEL E. LIPSCHUTZ

  3. Department of Geology, University of Kansas, Lawrence, Kansas, 66045

    W. R. VAN SCHMUS

Authors
  1. MOHAMMED IKRAMUDDIN
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  2. MICHAEL E. LIPSCHUTZ
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  3. W. R. VAN SCHMUS
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IKRAMUDDIN, M., LIPSCHUTZ, M. & SCHMUS, W. Effect of thermal metamorphic conditions on mineralogy and trace element retention in the Allende meteorite. Nature 253, 703–705 (1975). https://doi.org/10.1038/253703a0

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  • DOI: https://doi.org/10.1038/253703a0

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