Influence of mineral formation conditions on the distribution of Ge and Ti impurities in quartz of Darasun gold deposits.
https://doi.org/10.24930/2500-302X-2025-25-5-1161-1175
Abstract
Research subject. The distribution regularities of Ge and Ti impurities in gold-ore quartz. Materials and methods. The quartz of the Darasun, Teremkinskoye, and Talatuy gold deposits of the Darasun ore field was studied. The gross contents of germanium (C Ge) and titanium (C Ti ) impurities in quartz were determined by the LA-ICP-MS method; the contents of substitutional Ge and Ti impurities in the crystal lattice of the mineral were studied by the EPR method. Results. A correlation between the gross concentrations of C Ge and C Ti in quartz was determined. This correlation can take the form of an inversely proportional or directly proportional relationship. In the former case, quartz during crystallization captures predominantly Ge 2+ ions, and, in the latter case, Ge4+ ions. A model according to which the entry of Ge2+ ions into quartz occurs through the formation of complex aluminum complexes GeAl 2 O 4 is considered. The disintegration of such complexes during the recrystallization of quartz leads to the removal of Ge impurity and the capture of Ti impurity. Conclusions. It is suggested that the ratio of the contents of Ge2+ and Ge4+ ions in quartz reflects their ratio in the mineral-forming solution and is associated with the oxidation-reduction environment. On this basis, the type of relationship between the gross contents of Ge and Ti impurities in quartz is proposed to be used as an indicator of mineral formation conditions.
Supporting agencies: The research was carried out within the framework of the state assignment of IGEM RAS 121041500233-0
About the Authors
L. T. Rakov
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM), RAS
Russian Federation
Russian Federation
Leonid T. Rakov
V. Yu. Prokofiev
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM), RAS
Russian Federation
Russian Federation
Vsevolod Yu. Prokofiev
V. A. Kovalenker
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM), RAS
Russian Federation
Russian Federation
Vladimir A. Kovalenker
E. A. Minervina
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM), RAS
Russian Federation
Russian Federation
Elena A. Minervina
L. D. Zorina
A.P. Vinogradov Institute of Geochemistry, SB RAS
Russian Federation
Russian Federation
Lidiya D. Zorina
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Review
For citations:
Rakov L.T., Prokofiev V.Yu., Kovalenker V.A., Minervina E.A., Zorina L.D. Influence of mineral formation conditions on the distribution of Ge and Ti impurities in quartz of Darasun gold deposits. LITHOSPHERE (Russia). 2025;25(5):1161-1175. (In Russ.) https://doi.org/10.24930/2500-302X-2025-25-5-1161-1175
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