The Bukachachinskoye field, located in Eastern Transbaikalia (coordinates 53° N and 116°50' E), attracts attention for three reasons. Firstly, among other Mesozoic spots in Transbaikalia, it has undergone the most detailed geological research , and therefore the results of work on it make it possible to outline a methodology for studying such deposits, which has not yet been sufficiently developed, secondly, because its study sheds light on the genesis of Upper Jurassic deposits and tectonics and, thirdly, because the deposit has sintering coals, which sharply distinguishes it from other brown coal deposits in Transbaikal. The coal-bearing deposits of the deposit occupy an area of about 40 km², their boundaries are the Sarananda and Kudikhta rivers. Coal-bearing deposits are surrounded by hills of crystalline rocks, and the boundary of their distribution coincides with the boundaries of the valley. These contours, in addition to their natural outlines, due to the different hardness of crystalline rocks and coal-bearing deposits, were established by exploration work, the lines of which intersect the deposit at a close distance from each other, and these lines in places extend onto granites. There are no natural outcrops of coal-bearing strata in the area, and all data on its occurrence and composition were obtained on the basis of workings.
