摘要 : During the past two decades, great progress has been made in the uranium-series disequilibrium studies and the results have been widely applied to the dating of the Pleistocene pure carbonate deposits with great success. However, ... 展开 During the past two decades, great progress has been made in the uranium-series disequilibrium studies and the results have been widely applied to the dating of the Pleistocene pure carbonate deposits with great success. However, many carbonate deposits are impure and contain detrital material mainly composed of silicate minerals. The presence of detrital material which cannot be isolated from the carbonate fraction by simple 收起