Fluid inclusion thermometric and stable isotope (δ18O-δD) evidence for “cryptic boiling” in the Profitis Ilias epithermal gold deposit, Milos : a potential exploration tool for epithermal gold

Kilias, S.P.; Naden, J.; Leng, M.; Cheliotis, I.. 2001 Fluid inclusion thermometric and stable isotope (δ18O-δD) evidence for “cryptic boiling” in the Profitis Ilias epithermal gold deposit, Milos : a potential exploration tool for epithermal gold. Bulletin of the Geological Society of Greece, 34. 1053-1058.

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Abstract/Summary

“Cryptic boiling” has been disclosed throughout the vertical extent of the Profitis Ilias epithermal system (~450 m) by assessing systematic variations in fluid inclusion and stable isotope (δ18O-δD) data in relation to elevation. Highest gold grades (Au: 2-57.9 g/t) are preferentially concentrated in the upper 200-250 m of the system in a “steam-dominated zone” that is separated from a lower “liquid-dominated zone” (Au < 2 g/t). This distribution of gold may be due to colloidal transport in a boiling epithermal system. The identification of the base of the “steam-dominated zone” using fluid inclusion and stable isotope data may potentially guide exploration drilling to depths with high-grade gold ore in productive epithermal systems.

Item Type:	Article
Programmes:	BGS Programmes > Economic Minerals
Additional Keywords:	fluid inclusions, boiling, isotopes, epithermal gold, exploration
NORA Subject Terms:	Earth Sciences
Date made live:	10 Sep 2010 08:41
URI:	http://nora.nerc.ac.uk/id/eprint/7711

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