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太平洋沿岸の完新統に含まれる海生生物と陸源植物の放射性炭素年代値の差異

Offset in radiocarbon ages between marine bioclast and terrestrial plant pairs in the Holocene sediments along the Pacific coasts around Japan

中西 利典; 七山 太*; 堀 和明*; 丹羽 雄一*; 小松原 純子*; 北村 晃寿*; Hong, W.*

Nakanishi, Toshimichi; Nanayama, Futoshi*; Hori, Kazuaki*; Niwa, Yuichi*; Komatsubara, Junko*; Kitamura, Akihisa*; Hong, W.*

放射性炭素($$^{14}$$C)の海洋リザーバー効果の時空間変化を評価するために、日本周辺の完新統で同層準から採取した植物片と海生生物遺体の$$^{14}$$C年代値を比較検討する研究を進めてきた。今回は北海道東部(Nanayama et al., 2003; Nanayama, 2020)、三陸海岸(Niwa et al., 2017, 2019)、荒川低地(小松原ほか、2009, 2010)、清水平野(Kitamura and Kobayashi, 2014)、濃尾平野および台湾南部において採取したボーリングコア試料を用いて検討した。

To identify chronological and spatial changes in the radiocarbon ($$^{14}$$C) marine reservoir effects, the $$^{14}$$C ages of eight pairs of marine shells and terrestrial plants were measured from the same horizons of one core of Holocene sediments around Japan. To determine the direct chronological changes of the marine reservoir effect between the Kuroshio and Oyashio Currents, radiocarbon ages were measured from the same stratigraphic horizons within Holocene sediment cores alomg the Pasific coast of Japan (eastern Hokkaido; Nanayama et al., 2003, Nanayama, 2020, Sanriku Coast; Niwa et al., 2017, 2019, Arakawa Lowland; Komatsubara et al., 2009, 2010, Shimizu Plain; Kitamura and Kobayashi, 2014; Nobi Plain) and Taiwan.

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