| 摘 要： | Sedimentation rate of sediments on the continental slope of the South China Sea has been determined by the Th_(ex)~(230) method. Results show that in the upper part of the core from the surface layer down to 48 cm there might have occurred a downslope, reflecting a discontinuous depositional process and palaeoclimate becoming warmer; in the middle section of the core the activities of Th_(ex)~(230) show an exponential decrease with increasing depths and depoaitional rate is 1.6mm/1000 years, and sediments might have been formed in a cold and deep-water environment: in the core from 90cm downward there might have been an active sedimentary environment with a warmer palaeoclimate.Based on the contents of U and Th, U/Th ratios and their relationships with Fe, Mn, Corg and P in all layers of the core, it is inferred that materials of the studied waters are mainly of terrestrial phase with a portion of authigenous constituents.
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