Detection of a hot 137Cs particle in marine sediments from Norway: potential implication for 137Cs dating

Summary: The sedimentary environment in Vefsnfjord, Norway was significantly impacted by fallout from the Chernobyl accident, leading to higher Cs-137 inventories compared to other Norwegian fjords. Sediment supply rates were assessed at four sites using Pb-210/Ra-226 and Cs-137, with sedimentation rates ranging from 0.042 to 0.25 g cm(-2) y(-1). Well-defined Cs-137 concentration peaks served as a supplementary tool for the Pb-210 dating methods.