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http://dx.doi.org/10.5657/kfas.2004.37.2.159

Sedimentation and Distribution Pattern of the Fine-grained Sediments in the Southeastern Inner Shelf of Korea  

YOO Dong Geun (Petroleum and Marine Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM))
KIM Gil Young (Research Institute of Marine Science & Technology, Korea Maritime University)
LEE Ho Young (Petroleum and Marine Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM))
SEO Young Kyo (Department of Environmental Exploration Engineering, Pukyong National University)
PARK Soo Chul (Department of Oceanography, Chungnam National University)
KIM Dae Choul (Department of Environmental Exploration Engineering, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.37, no.2, 2004 , pp. 159-169 More about this Journal
Abstract
Sedimentation and depositional pattern of the fine-grained sediments in the southeastern inner shelf of Korea were studied using a very high-resolution seismic profiles and sediment data. The recent mud deposits up to 45 m thick are distributed in the inner shelf forming a nearshore belt from the eastern part of Geoje Island to off the Pohang along the coast. The sediment in this area consists of homogeneous mud with mean grain size between $8.6\;to\;5.3\phi$ and does not show any distinct variability It gradually becomes finer and well sorted northeastward along the coast. Sediments normally appear as structureless massive mud but X-radiographs show that some bioturbation and faint lamination are present. The sediments accumulate at a rate of 0.18-0.44 cm/yr and the rate coincides well with the long-term (a 1000-year scale) accumulation based on very high-resolution seismic data. Distribution of wet bulk density and velocity shows a gradual increase from the southeastern part of Ulsan to off Pohang, whereas porosity shows a reverse pattern. Correlations between velocity and porosity/mean grain size are different from other regions compared, due to the difference of sediment texture and sedimentary environment. The recent shelf deposits are seismically characterized by three distinct facies: 1) well-stratified (near the river mouth), 2) semi-transparent (eastern part of Geoje Island), and 3) transparent (off Ulsan). The results suggest that fine-grained sediment derived from rivers, forming a nearshore mud belt, have been transported northeastward by the northeastward-flowing coastal current.
Keywords
Sedimentation and depositional pattern; High resolution seismic profile; Physical properties; Southeastern inner shelf of Korea;
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  • Reference
1 Yoo, D.G. and S.C. Park. 1997. Late Quaternary lowstand wedges on the shelf margin and trough region of the Korea Strait. Sediment. Geol., 109, 121-133   DOI   ScienceOn
2 Yoo, D.G. and S.C. Park. 2000. High-resolution seismic study as a tool for sequence stratigraphic evidence of high-frequency sea-level changes: Latest Plei- stocene-Holocene example from the Korea Strait. J. Sedimentol. Res., 70, 210-223   DOI   ScienceOn
3 Yoo, D.G., H.Y. Lee, S.P. Kim, K.O. Kim, N.H. Ku and Y.G. Kim. 2002. Seismic stratigraphy and deposi-tional history of late Quaternary deposits on the Korea Strait inner shelf, Korea. J. Kor. Geophys. Soc., 5(4), 271-281
4 Yoo, D.G., C.W. Lee, J.Y. Choi, S.C. Park and J.H. Choi. 2003. Sequence stratigraphy of Late Quaternary de-posits in the southeastern continental shelf, Korea. J. Kor. Soc. Oceanogr., 8, 369-379. (in Korean)
5 Kim, M.S., K.S. Chu and O.S. Kim. 1986. Inverstigation of some inflluence of the Nakdong River water on marine environment in the estuarine area using Landsat imagery. Rpt. Korea Ministry Sci. Technology, 93-147
6 Kim, S.Y. and B.C. Suk. 1985. The sound velocity and attenuation coefficient of the marine surface sediments in the nearshore area. J. Oceanogr. Soc. Korea, 20, 10-21. (in Korean)
7 Min, G.H. 1994. Seismic stratigraphy and depositional history of Pliocene-Holocene deposits in the south- eastern shelf, Korean Peninsula. Ph.D. Thesis, Seoul Natl. Univ., Seoul, Korea, pp. 196. (in Korean)
8 Anderson, R.S. 1974. Statistical correlation of physical properties and sound velocity in sediments. In: Physics of Sound in Marine Sediment, Hampton, L., ed. Plenum. New York, pp. 481-457
9 Birch, F. 1960. The velocity of compressional waves in rocks up to 10 kilobars. J. Geophys. Res., 65, 1083- 1102   DOI
10 Boyce, R.E. 1976. Definition and laboratory techniques of compressional sound velocity parameter and wet- water, wet bulk density, and porosity parameter by gravimetric and gamma ray attenuation Zion tech- niques. Initial Reports of the Deep Sea Drilling Project 33, Washington, DC, U.S. Government Printing Office, pp. 931-958
11 Park, S.C. and K.S. Chu. 1991. Dispersal pattern of river-derived fine grained sediments on the inner shelf of Korea Strait, In: Oceanography of Asian Marginal Sea, Takano, T., ed. Elsevier Oceanography Series, 54, pp. 231-240   DOI
12 Mitchum, R.M., P.R. Vail and S. Thompson. 1977. Seismic stratigraphy and global changes of sea level. Part 2: The depositional sequence as a basic unit for strati-graphic analysis. In: Seismic stratigraphy-applications to hydrocarbon exploration. Payton, C.W. ed. AAPG Mem., 26, 53-62
13 Park, B.K. and S.J. Han. 1985. The distribution of clay minerals in the recent sediments of the Korea Strait. Sedi. Geol., 41, 173-184
14 Park, Y.A., K.R. Kim, S.C. Park and S.Y. Bak. 1987. Characteristics of the bottom sediments from the continental shelf of the Korea Strait and some geo-chemical aspects of the shelf fine-grained sediments. J. Oceanogr. Soc. Korea, 22, 43-56
15 Park, S.C., K.M. Jang and S.D. Lee. 1990. High-resolution seismic study of modern fine-grained deposits: inner shelf off the southeastern coast of Korea. Geo-Mar. Lett., 10, 195-205
16 Park, S.C., D.G. Yoo, K.W. Lee and H.H. Lee. 1999. Accumulation of recent muds associated with coastal circulations, southeastern Korea Sea (Korea Strait). Cont. Shelf Res., 19, 589-608   DOI   ScienceOn
17 Choi, D.L., J.K. Oh, C.W. Lee and H.J. Woo. 1997. High resolution seismic characteristics of the Holocene mud deposits in the southeast innershelf, Korea. J. Kor. Soc. Oceanogr., 2, 8-13
18 Folk, R.L. and W.C. Ward. 1957. Brazos river bars, a study in the significance of grain size parameters. J. Sedi. Petrol., 27, 3-27   DOI
19 Park, Y.A. and J.Y. Choi. 1986. Factor analysis of the continental shelf sediments of the southeast coast of Korea and its implication of the depositional environ-ments. J. Oceanogr. Soc. Korea. 21, 34-45
20 Park, S.C., D.G. Yoo, C.W. Lee and E.L. Lee. 2000. Last glacial sea-level changes and paleogeography of the Korea (Tsushima) Strait. Geo-Mar. Lett., 20, 64-71   DOI   ScienceOn
21 Shim, T.W., J. Wiseman Jr., O.K. Huh and W.S. Chung. 1984. A test of geostrophic approximation in the Western Channel of the Korea Strait. In: Ocean Hydrographic Dynamics of the Japan Sea and East China Sea, Ichiye, T., ed. Elsevier, Amsterdam, pp. 263-272
22 Yoo, D.G., S.C. Park, W.C. Shin, and W.S. Kim. 1996. Near-surface seismic facies at the Korea Strait shelf margin and trough region. Geo-Mar. Lett., 16, 49-56   DOI   ScienceOn
23 KHO (Korea Hydrographic Office). 1982. Marine environ- mental atlas of Korean waters, pp. 38
24 Hamilton, E.L. 1970. Sound velocity and related properties of marine sediments, J. Geophys. Res., 75, 4423-4446   DOI
25 Hamilton, E.L. and R.T. Bachman. 1982. Sound velocity and related properties of marine sediments. J. Acoust. Soc. Am., 72, 1891-1904   DOI   ScienceOn
26 Jang, K.M. 1990. Sedimentation of fine-grained sediments on the inner shelf off the southeastern coast of Korea. MS Thesis, Chungnam Natl. Univ., Daejon, Korea, pp. 113. (in Korean)
27 Kim, D.C., J.Y. Sung, S.C. Park, G.H. Lee, J.H. Choi, G.Y. Kim, Y.K. Seo and J.C. Kim. 2001. Physical and acoustic properties of shelf sediments, the South Sea of Korea. Mar. Geol., 179, 39-50   DOI   ScienceOn
28 Kim, G.Y., D.C. Kim, S.C. Park, D.G. Yoo, J.H. Choi and J.C. Kim. 1996. Physical properties of sandy sediment in the southeastern coast of Korea. J. Kor. Fish. Soc., 29, 663-676. (in Korean)
29 Kim, G.Y., D.C. Kim, Y.K. Seo, S.C. Park, J.H. Choi and J.C. Kim. 1999. Physical properties of mudbelt sediments in the southeastern inner shelf of Korea. J. Kor. Soc. Oceanogr., 4, 338-348. (in Korean)
30 Kim, G.Y. and D.C. Kim. 2001. Comparison and correla-tion of physical properties from the plain and slope sediments in the Ulleung Basin, East Sea (Sea of Japan). J. Asian Earth Sci., 19, 669-681   DOI   ScienceOn