Stratabound pyritic sulphide occurrences in an ophiolite rock assemblage near Tumut, New South Wales
Titel:
Stratabound pyritic sulphide occurrences in an ophiolite rock assemblage near Tumut, New South Wales
Auteur:
Ashley, P. M.
Verschenen in:
Australian journal of earth sciences
Paginering:
Jaargang 21 (1974) nr. 1 pagina's 53-62
Jaar:
1974-03
Inhoud:
Pyrite-rich sulphide with minor chalcopyrite, sphalerite, marcasite, and pyrrho-tite, occurs in low-grade metabasaltic rocks near Tumut, New South Wales. The rocks are chemically akin to modern abyssal tholeiites and form part of a well-developed ophiolite rock assemblage. Rock alteration and sulphide mineral assemblages are similar to those found in pyrite-rich sulphide deposits in the Troodos ophiolite complex, Cyprus, and in other ophiolite complexes, although low-grade regional metamorphism has caused textural and mineralogical changes. It is suggested that the Tumut occurrences formed from submarine volcanic exhalations, associated with abyssal theoliite volcanism; and that the ophiolite rock assemblage formed contemporaneously with a sea-floor spreading episode. The ophiolite rock assemblage was later obducted, perhaps during continental collision.
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