대형과학조사선 이사부호 시험항해를 통해 획득한 21 m 주상퇴적물: 17만년의 기록에 대한 예비결과

Abstract

After a decade of planning and three years of construction, multidisciplinary research vessel (R/V) ISABU (100 x 18 m, 5,900 ton) has finally started to test the geophysical and geological equipments in East Sea. At the end of June 2016, acoustic pre-site survey (seafloor mapping (EM122) and sub-bottom seismic survey (ParaSound P70)) was performed to find the target area that is gas free and well identified sedimentary layers in Ulleung Basin and southeastern continental slope. Geophysical survey provided a good opportunity to select appropriate coring sites and to understand depositional patterns. Giant Piston Corer System (GPC, OSIL), installed on the starboard of the R/V ISABU, retrieved up to 11.6, 20.7 and 19 m long sediment cores in southern Ulleung Basin (2,100 m water depth) and southwestern Continental Slope (1,400 m water depth) of East Sea, respectively. Although coring system has to be improved that narrow gap between barrel and liner, too much thickness of liner, it is useful equipment. Long sediment cores have been analyzed to understand the high-resolution paleoenvironmental reconstruction and paleoproductivity using nondestructive parameters (magnetic susceptibility, X-ray, XRF etc.), sedimentary textures and geochemical parameters. The preliminary results have been prepared for publication on characteristics of sedimentary facies, paleoproductivity of surface water during 170 kyr and paleoenvironmcoustic pre-site survey (seafloor mapping (EM122) and sub-bottom seismic survey (ParaSound P70)) was performed to find the target area that is gas free and well identified sedimentary layers in Ulleung Basin and southeastern continental slope. Geophysical survey provided a good opportunity to select appropriate coring sites and to understand depositional patterns. Giant Piston Corer System (GPC, OSIL), installed on the starboard of the R/V ISABU, retrieved up to 11.6, 20.7 and 19 m long sediment cores in southern Ulleung Basin (2,100 m water depth) and southwestern Continental Slope (1,400 m water depth) of East Sea, respectively. Although coring system has to be improved that narrow gap between barrel and liner, too much thickness of liner, it is useful equipment. Long sediment cores have been analyzed to understand the high-resolution paleoenvironmental reconstruction and paleoproductivity using nondestructive parameters (magnetic susceptibility, X-ray, XRF etc.), sedimentary textures and geochemical parameters. The preliminary results have been prepared for publication on characteristics of sedimentary facies, paleoproductivity of surface water during 170 kyr and paleoenvironm