As fallout { { } 137 Cs } with a short half life of 30 ^17 a in modern lake deposits, depth distribution shapes of cosmogenic radionuclide 10 Be with a long half of 1.

Information of Environmental Evolution Recorded by Munengnuor Lake Sediment in the Lower Reaches of Heihe River

Sediment samples from Dianchi Lake sediment core were measured by means of the direct γ ray analysis for the sediment-depth profiles of natural radionuclides 210 Pb and 226 Ra and artificial radionuclides 137 Cs and 241 Am.

The information about the climate change and early human activities for 9 000 a in Jiangling area,Hubei Province,China,was documented in lake sediments.

Especially the lake sediments with bigger deposit velocity are well proxies for high-resolution environmental changes researches.

, loess, river sediments, lake sediments, aeolian sediments and red earth, were chosen from South China for magnetic susceptibility measurement, grain-size measurem.

For more than ten years, many studies related to the lake sediments and environmental changes on Tibetan Plateau have been carried out.

Taking MSS image data in 1970 s and ETM image data in 2000 as the major data source,the authors studied the dynamic changes of lake areas in Qinghai-Tibet Plateau during the recent 30 years by using RS and GIS technology.

Based on analysis of grain size, geochemical elements, organic matter and CaCO 3 records in lacustrine sediment in Baiyin-kulun lake, combined with 210Pb and 137Cs, the sequence of climatic and environmental change of Otindag Sandy Land was reconstructed in the past 500 years, including two important climate events, i.

From the base of the formation upwards,the succession is composed of braided river,meandering river and lacustrine sediments.

Lake level change recorded by core of the Quaternary lacustrine sediment in the central Tibetan plateau and its climatic implications;