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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 19 - 32 (14page)
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초록· 키워드
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On the Duuri macrotidal flat along the west coast of Korea, mud sheets exceeding 20 cm in thickness form during summer, and are completely eliminated in the course of the following winter. This cyclical seasonal deposition/erosion of mud on the extensive intertidal flat of Korea has to date not been plausibly explained. To elucidate the responsible mechanism, vertical profiles of suspended sediment concentrations (SSCs) were obtained from March to August 2008 using an ASM-IV, which comprises a vertical array of OBS sensors mounted within a 1.44-m-long pole. The measurements reveal that a high-concentration mud layer begins to develop in mid-May, and reaches concentrations over 10 g/l (fluid mud) by August. SSCs are observed to be generally higher at spring tide than at neap tide. The fluid mud (SSCs > 10 g/l) clearly responds to wave action: the calm period being characterized by a two-layer profile, whereas a gradational one-layer profile during the rough summer season. The fluid mud sheet blanketing the exposed flat is supposed to be semi-consolidated mainly by organic processes and solar radiation during low-water slack tide. The differential response of the fluid mud to the variable seasonal wave-energy conditions thus plays a key role in the rapid and widespread formation of ephemeral mud flats in the study area during summer. The available evidence, however, suggests that the summer mud sheet has a very low potential for preservation in the rock record.
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참고문헌 (87)
참고문헌 신청
Allen, G.P. / 1977 / Transport and deposition of suspended sediment in the Gironde estuary;Estuarine Processes, Vol. II: Circulation, Sediments and Transfer of Material in the Estuary / Academic Press :63~81
Allen, J.R.L. / 1990 / The Severn Estuary in Southwest Britain: its retreat under marine transgression, and fine sediment regime / Sedimentary Geology 66:13~28
Anthon,y E.J. / 2008 / Nearshore intertidal topography and topographicforcing mechanisms of an Amazon-derived mud bank in French Guiana / Continental Shelf Research 28:813~822
Augustinus, G.E.F. / 2002 / Biochemcial factors influencing deposition and erosion of fine grained sediment;Muddy Coast of the World: Processes, Deposits and Function / Proceedings in Marine Science 4:203~228
Baek, Y.S. / 2004 / Southwestern coast of Korea / Korean Journal of Petrology Geology 10:10~17
Allen, J.R.L. / 1990 / The Severn Estuary in Southwest Britain: its retreat under marine transgression, and fine sediment regime / Sedimentary Geology 66:13~28
Anthon,y E.J. / 2008 / Nearshore intertidal topography and topographicforcing mechanisms of an Amazon-derived mud bank in French Guiana / Continental Shelf Research 28:813~822
Augustinus, G.E.F. / 2002 / Biochemcial factors influencing deposition and erosion of fine grained sediment;Muddy Coast of the World: Processes, Deposits and Function / Proceedings in Marine Science 4:203~228
Baek, Y.S. / 2004 / Southwestern coast of Korea / Korean Journal of Petrology Geology 10:10~17
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