Abstract
The distributions of cosmogenic nuclide10Be in the upper and lower salt units from a core (36.4°N, 94.5°E) in the Chaidamu Basin, Qinghai, China have been measured by means of accelerator-mass spectrometer. The comparison of these10Be results measured on salt and detritus fractions shows that the geochemical behaviour of10Be is detritus-phile. In this area10Be influx is different in the past tens of thousands of years, which is suggested to be related to climatic fluctuations during late Pleistocene. It seems that10Be influx is higher in the humid climate environnent than in the dry climate environment. The230Th-age estimates of two salt units have been determined. The corrected ages of the lower unit show a climate shift from humid to dry at about 50 Ka ago in this area.
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Zhuocheng, L., Ku, TL. 10Be distribution and uranium-series dating of salt samples from salt playae in the Chaidamu Basin, Qinghai, northwest China. Chin. J. of Geochem. 6, 257–263 (1987). https://doi.org/10.1007/BF02842121
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DOI: https://doi.org/10.1007/BF02842121