Deposits of the so-called gold-silver formation have been known and developed since ancient times in Bohemia, Transylvania, and Hungary. They are numerous in the west of North and Central America, in Japan, New Zealand, Philippines, Fiji, New Guinea, Sumatra. In our country gold-silver deposits are widespread in the North-East and Far East, in Kazakhstan, Central Asia, they are known in Transcaucasia and Eastern Transbaikalia ...

The deposit under consideration is one of the typical deposits of the gold-silver formation. Numerous ore bodies occur mainly among hydrothermally altered acidic and medium-sized rocks of effusive and subvolcanic facies. Explosive formations are widely developed - so-called tuffisites and tuffisite breccias, with which ore bodies are spatially closely associated ...

Gold deposits confined to mineralized zones of crushing and folding of sandstone-shale sequences have specific structural features. They differ from the widespread quartz-gold deposits of the vein type not only in the morphology of ore-hosting bodies, but also in the structure of ore fields confined to large discontinuous structures of deep occurrence, the long and complex history of ore formation, the significant scale of hydrothermally altered and mineralized rocks, and the predominant role of microscopic and sometimes dispersed gold in the ores. To put it simply, whereas for vein quartz-gold deposits the problem of prospecting and subsequent exploration comes down to finding veins and identifying areas (blocks) with commercial ores in them using the already repeatedly tested exploration grid, the theoretical aspects of the methodology for exploring gold deposits of the mineralized crushing zone type and their practical solution still need to be developed. ...