Opaque mineralogy and mafic mineral chemistry of I-and S-type granites of the Lachlan fold belt, Southeast Australia.

J. B. Whalen, B. W. Chappell

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    117 Citations (Scopus)

    Abstract

    A systematic survey of opaque mineral assemblages and mafic mineral chemistry was undertaken to clarify the relationship between the descriptive magnetite- and ilmenite-series granite classification and the petrogenetic I- and S-type granite classification. I- and S-type granites may belong to either the magnetite or ilmenite series. However, the bulk of I-type granites are magnetite series, and the bulk of S-type granites are ilmenite series. The fO2 in a granitic magma may be more important than the nature of the granitic source rocks in controlling the type of associated mineral deposits.-J.A.Z.

    Original languageEnglish
    Pages (from-to)281-296
    Number of pages16
    JournalAmerican Mineralogist
    Volume73
    Issue number3-4
    Publication statusPublished - 1988

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