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Trace element distributions of Lake Ogawara sediment core: Implication for the past sea level change at the late Holocene

Nara, Fumiko*; Yamasaki, Shinichi*; Watanabe, Takahiro   ; Tsuchiya, Noriyoshi*; Yamada, Kazuyoshi*; Yasuda, Yoshinori*

Lake Ogawara is located northernmost Honshu island Japan, Tohoku region alongside Pacific Ocean. In this study, the trace elements (Br and U) in the Lake Ogawara sediment core were analyzed using XRF to reconstruct the past sea level and salinity changes during the late Holocene. The depth profiles of the trace elements (Br and U) showed the gradual decrease from 160 cm depth to the top of the core (corresponding to ca. 2,200 cal BP). These results showed that the sea level was decreased at around 2,200 cal BP.

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