[HQR04-P15] High precision radiocarbon dating of marshland sediments using peat samples
Keywords:AMS, Radiocarbon dating, Peat deposits
In this study, we examined the highly accurate radiocarbon dating of marshy sediments using peat samples, using samples in drill cores collected at the Saruto River Marshland in the northern part of Hokkaido. In addition to the bulk peat sample, plants and aquatic plants were used for dating samples. The AMS 14C age was measured by the single stage accelerator mass spectrometer owned by the Analytical Center for Environmental Study, Atmosphere and Ocean Research Institute, The University of Tokyo.
In the age analysis of algae, it is presumed that the research area was the brackish water area, so the old salinity concentration (Sagayama et al. 2018) restored by the diatom analysis from the core sample obtained from the same wetland By using the brackish water environment to estimate the contribution rate of the reservoir effect of sea water and atmosphere, we confirmed the possibility that the calendar age can be estimated accurately.
In this presentation, we will discuss the possibility of high precision radiocarbon dating of marshy sediments using peat samples, taking samples in boring core taken at Sarutake River Marsh as examples.