Abstract

Abstract Alunite has been noted as a common member of hydrothermal assemblages resulting from the epigene sulphuric acid alteration of acidic volcanic rocks (Steiner, 1953, 1963; Harvey, 1967). Although alunite is not uncommon in sinter deposits at Whitianga (Harvey, 1967) and in silicified andesite at Thames (Hutton, 1947), this is the first occurrence for the Coromandel Peninsula where the alunite occurs in silicified greywacke.

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