Ion-microprobe analysis for rare elements and water in pantellerites from Pantelleria, Italy

V. I. Kovalenko, Richard Hervig, V. B. Naumov, I. P. Solovova, M. F. Sheridan

    Research output: Contribution to journalArticlepeer-review


    An ion microprobe was used to determine for the first time the contents of water and Li, Be, B, F, P, Rb, Sr, Ba, Y, Zr, Nb, Sn, Cs, and the REE in melt inclusions in pantellerites. Estimates were made of their distribution coefficients K between the liquid and phenocrysts of orthoclase, hedenbergite, aenigmatite, quartz, and apatite; for apatite the values are much less than one apart from those of Sr, Ba and the REE. The variations in K are controlled by the mineral structures. The highest K are found for elements that are crystallochemically similar to host elements in the minerals. The pantellerite magma before eruption contained not less than 4 wt.% water, whose loss on eruption was accompanied by appreciable losses only of Na and Cl; nearly all of the rare elements were retained in the magma. Pre-eruption crystallization began at 850° (anorthoclase) and continued to 760°C (quartz) and below and was accompanied by extensive accumulation of most of the rare lithophile and volatile elements in the residual liquid. -Journal summary

    Original languageEnglish (US)
    Pages (from-to)80-91
    Number of pages12
    JournalGeochemistry International
    Issue number4
    StatePublished - 1990

    ASJC Scopus subject areas

    • Geophysics
    • Geochemistry and Petrology


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