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Published September 1988 | Published
Journal Article Open

Correlated Isotope Fractionation and Formation of Purple FUN Inclusions


Allende coarse-grained inclusions characterized by a distinct purple color and high spinel contents (≤ 50 vol.%) exhibit a higher frequency of FUN isotopic anomalies (≈20%) than the general CAI population (≤6%). We used the ion microprobe to measure Mg, Si, Cr and Fe isotopic compositions of three Purple Spinel-rich Inclusions (PSI = ψ) which are petrographically similar to Type B CAl to investigate: 1) variations in isotopic fractionation within inclusions, including secondary phases; 2) correlated isotopic fractionation; and 3) excess ^(26)Mg.

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© 1988. Publication Date: 09/1988.

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Published - Wasserburg_1988p260.pdf


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October 17, 2023