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Explores the geochemical patterns of platinum and palladium in floodplain sediments in China, with an attempt to provide clues in searching for large-sized platinum-group elements. Information on sample collection and analysis; Abundance of platinum and palladium in floodplain sediments; Geochemical provinces of platinum and palladium.

In an area of 3.3×106 km2 within eastern China, 28 253 rock samples were collected systematically and combined into 2718 composite samples which were analyzed by 15 reliable methods using national preliminary certified reference materials (CRMs) for data quality monitoring. The average chemical compositions of the exposed crust, the sedimentary cover and the exposed basement as well as the upper crust for 76 chemical elements in eastern China are given. [ABSTRACT FROM AUTHOR]