Botogol deposit

BOTOGOL DEPOSIT of graphite (RU: Ботогольское месторождение графита) is situated within the central part of the eastern Sayan mountains, on the top of the Botogol bare stony mountain within the Buryat Autonomous Republic. The deposit has been discovered during the 1838, and is being developed since the 1847. It is confined to the Devonian intrusion of alkaline nephelinic syenites, which is breaching micaceous schists, gneisses, quartzites, and marbled limestones of the Proterozoic. The rocks are metamorphosed, crumpled into complicately-corrugated brachyanticlinal fold, and broken by numerous disjunctive dislocations.

The industrial clusters of graphite gravitate to nephelinic syenites, and to those limestones, which are contacting with syenites. The depositions of graphitic ores have the shape of ellipsoidal or rounded stocks and nests, with the volume from several cubic metres to thousands cubic metres (the Kornelevskiy stock). The major varieties of graphite are holocrystalline, tree-alike, teardrop-alike (concentric-shelly), and scaly. According to their textural-structural peculiarities and quality, the ores are sub-divided into continuous (the content of the graphitic hydrocarbon is 60% or more), blocked (20-40%), interspersed (10-30%), and banded. At the deposit, there is being developed the south-western deposition. The extraction of the ore is performed by the underground method with the stowing of the goaf space.