Fluids in early stage hydrothermal alteration of high-sulfidation epithermal systems: A view from the Vulcano active hydrothermal system (Aeolian Island,Italy) |
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| Authors: | Adrian J Boyce Paolo Fulignati Alessandro Sbrana Anthony E Fallick |
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| Institution: | 1. Stable Isotope Unit, Scottish Universities Environmental Research Centre, East Kilbride, Glasgow, G75 0QF, Scotland, United Kingdom;2. Dipartimento di Scienze della Terra, Universita'' degli Studi di Pisa, via Santa Maria, 53, 56126 Pisa, Italy |
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| Abstract: | High-sulfidation (HS) epithermal systems have elements in common with passively degassing volcanoes associated with high T, acid fumarole fields or acid crater lakes. They are considered to form in two stages, the first of which involves advanced argillic alteration resulting from intense, strongly acidic fluid–rock interaction. The La Fossa hydrothermal system (Vulcano Island) represents a classic example of such an active HS system and can be considered as a modern analogue of this early stage of alteration, resulting in a core of intense silicic (90–95% pure SiO2) alteration surrounded by alunitic alteration zones. |
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| Keywords: | hydrothermal alteration epithermal systems high-sulfidation stable isotopes Vulcano |
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