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UDC 553.411:552.1(550.81+550.85)(571.1)
GEOLOGICAL STRUCTURE, MINERALOGICAL AND PETROGRAPHIC FEATURES OF GOLD ORES AND ORE-BEARING METASOMATITES AT THE VIKTORYEVSKY SITE (MOUNTAIN SHORIA)
A. I. Chernykh, M. V. Viktorov, N. A. Baksheev, V. S. Senkevich, I. V. Shalamov, A. Yu. Shirobokov
In the paper the authors give new data on geological structure of the Viktoryevsky site, mineralogical and petrographic composition of gold ores and ore-bearing rocks. The recent exploration data acquired by the SNIIGGiMS crews justify the blocky structure of the Viktoryevsky site. Ore-controlling faults and igneous-sedimentary rocks of the Mundybash Formation are described, they are associated with the most direct and indirect prospecting indicators of gold mineralization. Within the Mundybash Formation the gold mineralization is controlled by linear zones of metasomatic rocks confined to faults. The maximum gold content of 1–26 g/t was discovered in the zones of vein-veinlet sulfide-quartz and impregnated pyritearsenopyrite mineralization among quartz-albite-sericite(muscovite)-ankerite metasomatites. Petrographic composition features of the ore-bearing metasomatites are described in detail, with conclusions drawn on their zonation. The paper also contains a brief mineralogical description of gold ores.
Key words: gold, Mountain Shoria, metasomatites, veinlet sulfide-quartz mineralization, Viktoryevsky site.
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