ABSTRACT

Detecting seawater-derived elements in terrestrial sediments as evidence of tsunami inundation is challenging due to dilution by freshwater over time. This study provides data useful for evaluating the potential of the strontium (Sr) isotope ratios (⁸⁷Sr/⁸⁶Sr) as indicators of seawater intrusion. We analyzed ⁸⁷Sr/⁸⁶Sr ratios in water leachates and acetic acid (AcOH) leachates from a sedimentary sequence sampled in November 2015 from a coastal lowland in Tohoku, Japan, which includes deposits from the March 2011 Tohoku earthquake tsunami.