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The distribution of Sr contents and isotopes of strontium Sr in the labile fraction of sediments from a channel fillings infill in the Middle Loire alluvial plain is used to highlight aspects of the evolution of the basin over the period from 10 000 yr. BP to the present. The acid extractable matter (AEM) in the sediment samples is variable in amount and in trace element contents. Carbonates and Fe-Mn oxyhydroxides are the principal carrying phases in the labile fraction. The historical record of 87 Sr/ 86 Sr ratio variations in AEM shows two components. In the first, the AEM is consistently low (around 10%) and the 87 Sr/ 86 Sr ratios range from around 0.7086 to 0.710. This corresponds to the

Strontium isotopic record of signatures of Holocene fluvial sediments in the Loire valley, France