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Stratigraphical and Sedimentological Studies on Core Sediments from the Southwestern Ulleung Basin, East Sea  

박명호 (연세대학교 지구시스템과학과)
류병재 (한국지질자원연구원)
김일수 (연세대학교 지구시스템과학과)
정태진 (한국지질자원연구원)
이영주 (한국지질자원연구원)
유강민 (연세대학교 지구시스템과학과)
Publication Information
Economic and Environmental Geology / v.35, no.2, 2002 , pp. 171-177 More about this Journal
Abstract
Two piston-core sediments, obtained from the southwestern margin of the Ulleung Basin in East Sea, are analyzed to investigate the stratigraphy and sedimentary environment of the Late Quaternary. The cores consist mainly of cuddy sediments with silty sands, lapilli tephra and ash layers. The chronostratigraphic correlation with known eruption ages reveals that the core sediments contain the stratigraphic document over the past 46.1 kyr and the sedimentation rates during the last glacial period were relatively higher (12.1-14.9 cm/kyr) than those in pelagic ocean. Several sedimentary facies, mainly affected by turbidity currents, are commonly present in the core interval accumulated during the oxygen-isotope stage 2. Many of horizontal voids, which are thought to have formed by gas expansion, are observed in fore 00GHP-07. The total organic carbon (TOC) contents of the core sediments are noticeably high (average 1 .8%). Particularly, these TOC valuers increased during Termination I, suggesting that dering this time interval the sedimentary environment of the study area was changed to more anoxic.
Keywords
Late quaternary; sedimentary environment; muddy sediments; tephra layer; total organic carbon; Ulleung Basin;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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