Sources of Material and Composition of Bottom Sediments of South Basin of Lake Baikal (Preliminary Results)
The results of investigation of recent bottom sediments, recovered at South Basin of Lake Baikal in area of situation of Baikal Neutrino telescope (north west coast, Ivanovskii Cape) has shown.
Biogenic-terrigenous mud and turbidites are main types of deposits. Turbidites are distinguishable from containing sediments by characteristic features. In particular, Holocene turbidites have increased content of Pliocene and Pleistocene species of diatoms. Sources of the diatom are deposits which are distributed along the south and south east shores of the lake.
Data of mineral composition of sand fraction of sediments has presented. There is shpinel in mud recovered near north west coast. This mineral is presented also in marble of ‘sharyzalgaiskoi’ series (early Precambrian), which are widely distributed in area of investigation (coastal section “Belaia Vyemka”).
Obtained results indicate that sources of turbidites are south and south east shores of South Baikal. The fact that the deposition of turbidites takes place far away from their sources testify of powerful, high-energy turbidity currents, which are responsible for the deposition of turbidites.