Computer thermodynamic modeling of the transport and deposition of Sb and Au during the formation of Au-Sb deposits |
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| Authors: | AA Obolensky LV Gushchina AS Borisenko AA Borovikov PA Nevol&#x;ko |
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| Institution: | aSobolev Institute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia |
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| Abstract: | Using the Chiller computer program, we performed modeling of the mechanisms of the joint transport and deposition of Au and Sb from various ore-forming solutions during the formation of Au-Sb deposits. Three models are considered by the example of the Uderei Au-Sb deposit in the Yenisei Ridge: (1) simple cooling (cooling only), (2) iso-enthalpy boiling (P = f(T)), and (3) solution–rock interaction (rock titration model). The behavior of Sb(III) and Au(I) in the system Au–Sb–Fe–Cu–Pb–Zn–As–H2O–Cl–H2S–CO2 under hydrothermal conditions was studied. It is shown that both weakly alkaline (near-neutral) and reduced acidic Feaq2+-enriched low-chloride high-CO2 and high-chloride hydrothermal solutions play a crucial role in the formation of gold parageneses of Au-Sb ores. |
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| Keywords: | Au-Sb deposits thermodynamic models ore-forming systems composition of hydrothermal solutions Au and Sb transport species metal transport capacity of solutions |
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