Eocene to Miocene Hydrothermal Deposits of Northern Greece and Bulgaria: Relationships Between Tectonic-Magmatic Activity, Alteration, and Gold Mineralization

Voudouris, Panagiotis; Siron, Chris R.; Márton, Istvan

doi:10.5382/gb.54

Cited by 2 publications

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“…They were identified as meta-lamprophyres. (Voudouris et al 2016;Xydous 2018) N 40.960313, E 24.438440 Several lamprophyre dikes crosscut sheeted veins and the Kavala granodiorite pluton on the highway to Thessaloniki. They have a modal composition of biotite-hornblende quartz monzodiorite.…”

Section: Tablementioning

confidence: 99%

Lamprophyric rock locations in Greece

Kamvisis¹

2019

Mineralogia

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Section: Tablementioning

confidence: 99%

Lamprophyric rock locations in Greece

Kamvisis¹

2019

Mineralogia

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The Ak-Sug Porphyry Copper–Gold–Molybdenum Deposit, East Sayan: Noble Metal Mineralization, PT-Parameters, and Composition of Ore-Bearing Fluid

Kuzhuget,

Ankusheva,

Khertek

et al. 2023

Geologiâ rudnyh mestoroždenij

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Ore mineralization of the Ak-Sug Porphyry Copper–Gold–Molybdenum deposit formed during three stages: 1) porphyry-copper mineralization with simple sulfides in quartz–sericite and quartz–sericite–chlorite metasomatites, 2) subepithermal Au–Bi–Te–Pd-quartz mineralization in quartz–sericite metasomatites, and 3) intermediate-sulfidation Au–Ag mineral assemblages with selenides, tellurides, and Sb and As sulfosalts in argillisites. Fluid inclusion studies (microthermometry, Raman spectroscopy) of quartz and mineral thermometry (an assemblage of Au and Ag tellurides) showed that porphyry copper and subepithermal mineralization precipitated from hydrocarbon–aqueous–chloride (Na–K ± Fe) fluid with salinity of 20.1–32.8 wt % NaCl eq. at 435–375°C and hydrocarbon–aqueous–chloride (Na–K ± Fe ± Ca ± Mg) fluid with salinity of 7.5–15.0 wt % NaCl eq. at 415–325°C, respectively. The epithermal mineral assemblages precipitated at ∼0.55 kbar from hydrocarbon–aqueous–chloride (Na–K ± Fe ± Ca ± Mg) fluid with salinity of 1.4–12.6 wt % NaCl eq. at 370–200°C. The latest low-temperature (240–190°С) and diluted (3.5–4.9 wt %) fluids are characterized by variations in Na and K chlorides; Fe2+, Fe3+, Ca, and Mg carbonates; and Na, K, and Mg sulfates. The S isotopic composition of the fluid of different mineral assemblages varies from –2.7 to +0.3‰ and suggest that they are derivatives of a single porphyry system. The δ18О values of the fluid of porphyry copper (7.4‰) and subepithermal (7.0‰) stages indicate its magmatic genesis, whereas those of the epithermal stage (from +1.2 to +7.2‰) are evident of mixing of magmatic fluid and meteoric waters (from +0.4 to +5.7‰). Our isotopic data, combined with mineralogical–geochemical peculiarities and formation conditions of ores, provide tracing the principles of the evolution of mineral assemblages, temperatures, composition, and fluid salinity at the Ak-Sug deposit upon the transition from porphyry copper to epithermal stage.

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Eocene to Miocene Hydrothermal Deposits of Northern Greece and Bulgaria: Relationships Between Tectonic-Magmatic Activity, Alteration, and Gold Mineralization

Cited by 2 publications

References 0 publications

Lamprophyric rock locations in Greece

Lamprophyric rock locations in Greece

The Ak-Sug Porphyry Copper–Gold–Molybdenum Deposit, East Sayan: Noble Metal Mineralization, PT-Parameters, and Composition of Ore-Bearing Fluid

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