Campus Units

Geological and Atmospheric Sciences

Document Type

Conference Proceeding

Publication Version

Published Version

Publication Date

2007

Journal or Book Title

Digging Deeper: Proceedings of the Ninth Biennial Meeting of the Society for Geology Applied to Mineral Deposits

First Page

641

Last Page

644

Conference Title

Ninth Biennial Meeting of the Society for Geology Applied to Mineral Deposits

Conference Date

August 20-23, 2007

City

Dublin, Ireland

Abstract

At Tinos Island, Greece, the physicochemical evolution of the hydrothermal system and the associated stages of metallic mineralization that are developed in the vicinity of the Tinos granodiorite-leucogranite has been studied, based on fluid inclusion studies and chemical reactions modeling. Early tungsten mineraliozation was related to the metasomatic stage of contact metamorphism and precipitated at ~ 350oC, from moderate saline (10.4 to 14.8 wt% NaCl eq.), CO2- effervescing fluids, that contained variable amounts of CaCl2 and MgCl2. Panormos Bay Au-Ag-Te mineralization, located 16 km away from the intrusive site, was deposited from cooler 200° to 300oC, and low to moderate saline (0.2 to 13.2 wt% NaCl eq.) mineralizing fluids. Au-Ag mineralization at Apigania Bay, which represents a late evolutionary phase, was deposited from even cooler (125o to 235oC) and dilute (0.2 to 6.8 wt % NaCl eq.) fluids. In all, the mineralization stage precipitation was controlled by two principal factors: the exsolution of gaseous phase and an increase in pH from 3.3 to 7.6.

Comments

This proceeding is published as Tombros, S.F., St. Seymour, K. St., Zouzias, Mastrakas, N., Spry, P.G., and Williams-Jones, A.E., The evolution of a W, Au-Ag-Te and Au-Ag hydrothermal system, Tinos Island, Cyclades, Greece, in Andrew C. J. et al. (eds.) Digging Deeper, Proceedings of the Ninth Biennial SGA Meeting, Dublin, Ireland, p. 641-644. Irish Association for Economic Geology, 2007. Posted with permission.

Copyright Owner

Society for Geology Applied to Mineral Deposits

Language

en

File Format

application/pdf

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Article Location

 
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