The Profitis Ilias deposit, Milos island, Greece : a case study of boiling in an epithermal system recorded by stable isotope and fluid inclusion data
Naden, J.; Kilias, S.P.; Leng, M.J.; Cheliotis, I.; Shepherd, T.J.; Spiro, B.. 1999 The Profitis Ilias deposit, Milos island, Greece : a case study of boiling in an epithermal system recorded by stable isotope and fluid inclusion data. In: Stanley, C.J., (ed.) Mineral deposits : processes to processing. Rotterdam, Netherlands, Balkema, 63-66.Before downloading, please read NORA policies.
Stable isotope (δD and δ18O) and microthermometric data are presented for the Profitis Ilias adularia-sericite-type epithermal gold deposit on Milos Island, Greece. The deposit was discovered by Midas Enterprise SA, and estimated reserves are 5 million tonnes grading at 4.4 g/t Au and 43 ppm Ag. Microther-mometric data show that the system boiled. Stable isotope ratios were determined on inclusion-fluids (δD and δ18O) and vein quartz (δ18O). The inclusion-fluid data show fractionation trends consistent with single–stage steam separation and are broadly comparable to the currently active Milos geothermal system. The trends and comparisons in the fluid-mineral data are more difficult to interpret. This suggests that data derived by ana-lysing both δD and δ18O on inclusion-fluids can provide a better framework for interpreting fluid processes in epithermal systems than current methodologies based on calculating δ18O from fluid-quartz equilibria.
|Item Type:||Publication - Book Section|
|Programmes:||BGS Programmes > Economic Minerals|
|NORA Subject Terms:||Earth Sciences|
|Date made live:||10 Sep 2010 10:06|
Actions (login required)