Mineralogy and geochemical environment of formation of the Perama Hill high-sulfidation epithermal Au-Ag-Te-Se deposit, Petrota Graben, NE Greece

Electron microprobe analyses of ore minerals and H–O, S isotope geochemistry of the Yuerya gold deposit, eastern Hebei, China: Implications for ore genesis and mineralization

“…Ciobanu et al (2006Ciobanu et al ( , 2009 suggested that the presence of tellurides is indicative of a magmatism-associated system, a viewpoint that is supported by other research. For example, tellurides have also been reported within numerous gold deposits including epithermal Au-Te and Au-Ag deposits in subaerial volcanic environments (e.g., Shackleton et al, 2003;Ciobanu, 2004, 2005;Ciobanu et al, 2005Ciobanu et al, , 2006Voudouris et al, 2011;Nikolaev et al, 2013). These previous studies suggest that the gold mineralization within the Yuerya gold deposit is related to the Yuerya granitoid pluton, with the latter a potential source of heat and some of the metals within the deposit, as described above.…”

Gold Metallogeny of the Serbomacedonianrhodope Metallogenic Belt (Srmb)

“…Placer gold and minerals of the platinum group (alloys of Os-Ir-Ru, Os-Ir-Rh, Os-Ir-Pt, and Pt-Fe) were also found in Servia Kozani and along the riverbeds of Aliakmonas and Axios and their tributaries. The most important and economically significant ores of gold are located in the regions of Thrace and Macedonia (Kalogeropoulos et al, 1989;Michael, 2004;Shawh and Constantinides, 2001;Charistos, 2010;Voudouris et al, 2011;Tsirambides and Filippidis, 2012).…”

“…Sulphides are found at a depth of approximately 120 m. The probable / indicated reserves of this deposit are ~11.7 Mt of ore at an average grade of 3.1-3.5 g/t Au (~74 t Au) and 2.8-4.2 g/t Ag (~62 t Ag) ( Table 1). Eighty percent of the gold is hosted by sandstones (oxidized upper part of the deposit) and the rest is associated with base metal sulphides and tellurides hosted within andesitic breccias and conglomerates (Michael, 2004;Voudouris et al, 2011).…”

Metallic mineral resources of Greece

“…Gold has been located in the submarine fan sandstones of the Ionian Zone [47]. The most important and economically significant ores of gold are located in Chalkidiki (Olympias, Skouries), in Perama Hill Evros, in Sapes Rhodope and in Kilkis (Antigonia, Gerakario, Vathi, Pontokerassia) [12,13,33,34,[48][49][50]. In October 2004 a new Greek Co acquired the initial Kassandra mines Co and the mining and processing of galena and sphalerite continued.…”

“…Eighty percent of the gold is hosted by sandstones (oxidized upper part of the deposit) and the rest is associated with base metal sulphides and tellurides hosted within andesitic breccias and conglomerates [50]. The upper oxidized part of Perama Hill deposit is free of As, Pb or other heavy metals.…”