Lithostratigraphy and geochemical evidences for paleooceanographic changes in core sediment from the Korea Plateau of the East Sea (Japan Sea), Korea over the last 400 kyr

Abstract

High-resolution measurements were performed on core E09-08, which was taken from the top flat area of the Korea Plateau in the East Sea (Japan Sea). Based on the high-resolution oxygen isotope results, the sediment color (L*), and comparison with previous results from the eastern part of the East Sea, the detailed lithostratigraphy was reconstructed. The biogenic components (TOC and carbonate) and the carbon (&#61540 13Corg) and nitrogen (&#61540 15Norg) isotopes of the organic matter in sediments from core E09-08 were investigated to delineate the paleoceanographic variations. This demonstrated that the cores, which covered about 400 kyr, approximately the middle of Marine Isotope Stage (MIS) 11, providing high-resolution paleoceanographic records of the Korea Plateau, northern part of Ulleung Basin in East Sea, Korea.n with previous results from the eastern part of the East Sea, the detailed lithostratigraphy was reconstructed. The biogenic components (TOC and carbonate) and the carbon (&#61540 13Corg) and nitrogen (&#61540 15Norg) isotopes of the organic matter in sediments from core E09-08 were investigated to delineate the paleoceanographic variations. This demonstrated that the cores, which covered about 400 kyr, approximately the middle of Marine Isotope Stage (MIS) 11, providing high-resolution paleoceanographic records of the Korea Plateau, northern part of Ulleung Basin in East Sea, Korea.1