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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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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