Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia

Advanced Search

Russian Geology and Geophysics

2009 year, number 11

Computer thermodynamic modeling of the transport and deposition of Sb and Au during the formation of Au-Sb deposits

A.A. Obolensky, L.V. Gushchina, A.S. Borisenko, A.A. Borovikov, P.A. Nevol'ko
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Au-Sb deposits; thermodynamic models; ore-forming systems; composition of hydrothermal solutions; Au and Sb transport species; metal transport capacity of solutions
Pages: 950-965


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.