Age estimates of deep-water bottom sediments of Lake Baikal from uranium-series disequilibrium

The paper presents mathematical models simulating the relative radioactivit y of uranium isotopes in the Selenga discharge and in the water of Baikal. The measured contemporary radioactivity of uranium isotopes relative to the initial level is proposed as a means of dating pelagic sediments in Lake B aikal by a special method. Preliminary estimates based on published measure ment data agree with qualitative modeling results and with Arkhipov's time scale of paleoclimates for Siberia.