Литотипы, фации и источники материала осадочных пород в Баргузинской долине Байкальской рифтовой системы

Lithological, petrographic, and lithogeochemical data are given for sedimentary rocks of alluvial, lacustrine-marsh, and lacustrine facies in the Barguzin valley, uncovered by new boreholes. During petrographic studies of thin sections, the main lithotypes of stratons of rift basins were identified. According to the mineral composition of the rocks, petrochemical and microelement characteristics, a conclusion was made about the origin of sedimentary deposits as a result of erosion of the granite basement rocks.