The Estrela copper deposit, Carajás, Brazil: Geology and implications of a Proterozoic copper stockwork (original) (raw)

Abstract

Estrela is a recently discovered Cu-(Mo-[Au-Sn]) deposit, and one of several granite-related Cu±Au deposits within the Carajás Mineral Province (CMP) of northern Brazil. The deposit comprises a stockwork of quartz-biotite-muscovite-fluorite-chalcopyrite veins and biotite-pyrrhotite-chalcopyrite alteration of country rocks.

Mineralisation is intimately associated with a 1.88 Ga A-type granite. Serra dos Carajás (northern CMP) is renowned for Cu±Au deposits and these define at least two metallogenic epochs, an Fe-oxide Cu-Au event of 2.5–2.7 Ga and a new Cu±Au-(Ag-W-Sn-Mo-Bi) granite-related event at ∼1.88 Ga. At a craton scale, Estrela may represent one of a series of deposits which illustrate a time-space distribution of A-type granite-related deposits in the Amazon craton which progress from ∼1.88 Ga Cu±Au deposits in Serra dos Carajás to Proterozoic tin-granites (1.88–0.97 Ga) e.g. Rondônian Tin Province.

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Authors and Affiliations

1. School of Earth Sciences, James Cook University, Townsville, Qld, 4811, Australia
   Karen M. Volp

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© 2005 Springer-Verlag Berlin Heidelberg

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Volp, K.M. (2005). The Estrela copper deposit, Carajás, Brazil: Geology and implications of a Proterozoic copper stockwork. In: Mineral Deposit Research: Meeting the Global Challenge. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-27946-6\_277

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