Mineral composition of surface bottom sediments and deposits of tributaries in the area of north shore of Southern Basin of Lake Baikal
Results of grain size and mineral (fraction 0,25–0,05 mm) analyses of recent bottom sediments and deposits of tributaries in the area of north shore of Southern Basin of Lake Baikal are presented in the article. Minerals of sand fraction of bottom sediments, recovered at 1300 m in area of Sharyzhalgai station of the Circum-Baikal Railway, and deposits of tributaries are mainly the same. They reflect the composition of coastal rocks. High content of biotite and terrestrial plant remains within very upper turbidite (interval 1–8 cm) of sediment core possibly indicate that the main source of the deposits of this layer is the northern coast of South Baikal. Content of heavy minerals in the most samples of sediment of tributaries is much higher than in the Baikal deposits.