Abstract
In this study, variations of organic carbon accumulation rate in hemipelagic mud during the end of last glacial period to deglaciation were examined in the two different depositional environments in the forearc basins along the Nankai Trough, such as on the deep-sea fan which connected submarine canyon and deep-sea floor where is far from the canyon mouth. The sediment of deep-sea fan contained several turbidite layers during the end of last glacial period, and the depositional frequencies of turbidites were decrease with sea-level rise during the deglaciation. On the other hand, turbidites were not recognized in the deep-sea floor sediments that were deposited far from the submarine canyon. The accumulation rate of organic carbon and terrigenous contents were high during the end of last glacial period, while those were low and the most of organic carbon is marine origin in the both depositional environments during the deglaciation.
