Uranium distribution in Baikal sediments using SSNTD method for paleoclimate reconstruction

First data on local distribution of uranium in the core of Lake Baikal floo r sediments (Academician ridge, VER-95-2, St 3 BC, 53 degrees 113'12'N/108 degrees 25'01'E) are presented in this paper. They have been obtained using (n,f)-radiography. Various forms of U-occurrence in floor sediments are sh own, i.e. evenly disseminated, associated with clayey and diatomaceous comp onents; micro- and macroinclusions of uranium bearing minerals - microlacat ions with uranium content 10-50 times higher than U-Concentrations associat ed with clayey and diatomaceous components. Relative and absolute U-concent ration can be determined for every mineral. Signs of various order periodic ity of U-distribution in the core of Lake Baikal floor sediments have been found. Using (n,f)-radiography method of the study of Baikal floor sediment permits gathering of new information that can be used at paleoclimate reco nstruction.