Resumo

RODRIGUEZ, María Eugenia; FERNANDEZ, Raúl R.; ECHAVARRIA, Leandro  e  DUCART, Diego F.. Hydrothermal alteration in San José mining district,Santa Cruz province. Rev. Asoc. Geol. Argent. [online]. 2010, vol.67, n.3, pp.408-411. ISSN 0004-4822.

Hydrothermal clay mineral present at San José were characterized by field portable spectroscopy. Mineral assemblages indicate that hydrothermal fluid evolved throughout the district, from low pH-high temperature proximal to neutral-low temperature distal fluids. Compositional difference of illite depends of the fluid characteristics becoming more Na-rich at high temperature whereas in mineralizated areas are K-normal.

Palavras-chave : Epithermal deposits; Hydrothermal alteration; San José district; Deseado Massif.

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