A Seismic Study on Muddy Sediment Deposits in the Northern Shelf of the East China Sea

동중국해 북부대륙붕에 발달한 니질 퇴적체의 탄성파 연구

  • Choi Dong-Lim (South Sea Institute, Korea Ocean Research and Development Institute) ;
  • Lee Tae-Hee (South Sea Institute, Korea Ocean Research and Development Institute) ;
  • Yoo Hae-Soo (Marine Geoenvironment Research Division, Korea Ocean Research and Development Institute) ;
  • Lim Dhong-Il (South Sea Institute, Korea Ocean Research and Development Institute) ;
  • Huh Sik (Marine Geoenvironment Research Division, Korea Ocean Research and Development Institute) ;
  • Kim Kwang-Hee (Marine Geoenvironment Research Division, Korea Ocean Research and Development Institute)
  • 최동림 (한국해양연구원 남해연구소) ;
  • 이태희 (한국해양연구원 남해연구소) ;
  • 유해수 (한국해양연구원 해양환경연구본부) ;
  • 임동일 (한국해양연구원 남해연구소) ;
  • 허식 (한국해양연구원 해양환경연구본부) ;
  • 김광희 (한국해양연구원 해양환경연구본부)
  • Published : 2005.12.01

Abstract

We present the sedimentary sequence and distribution pattern of the late Holocene muddy deposits in the northern East China Sea shelf using the high-resolution 'Chirp' profiles. The seismic sedimentary sequence overlying acoustic basement (basal reflector-B) can be divided into two depositional units (Unit 1 and 2) bounded by erosional bounding surface (mid reflector-M). The lower Unit 1 above basal reflector-H is characterized by the acoustically parallel to subparallel reflections and channel-fill facies. The upper Unit 2, up to 7 m in thickness, shows seismically semi-transparent seismic facies and lenticular body form. On the base of sequence stratigraphic concept, these two sediment units have developed during transgression and highstand period, respectively, since the last sea-level lowstand. The transgressive systems tract (Unit 1) lie directly on the sequence boundary (reflector B) that have farmed during the last glacial maximum. The transgressive systems tract in this study consists mostly of complex of delta, fluvial, and tidal deposits within the incised valley estuary system. The maximum flooding surface (reflector M) corresponding to the top surface of transgressive systems tract is obviously characterized by erosional depression. The highstand systems tract (Unit 2) above maximum flooding surface is made up of the mud patch filled with the erosional depression. The high-stand mud deposits showing a circle shape just like a typhoon symbol locates about 140 km off the south of Cheju Island with water depth of $60\~90m$. Coverage area and total sediment volume of the mud deposits are about $3,200km^2$ and $10.7\times10^9\;m^3$, respectively. The origin of the mud patch is interpreted as a result of accumulating suspended sediments derived from the paleo-Yellow and/or Yangtze Rivers. The circular distribution pattern of the mud patch appears to be largely controlled by the presence of cyclonic eddy in the northern East China Sea.

References

  1. 윤정수, 임동일, 변종수, 정희수 (2005) 87Sr/86Sr 비를 이용한 동중국해 대륙붕 퇴적물의 기원 연구. 한국해양학회지 바다, 10권, p. 92-99
  2. Allen, G.E and Posamentier, H.W. (1993) Sequence stratigraphy and fades model of an incised valley fill: the Gironde estuary. France. J. Sed. Petro., v. 63, p. 378-391
  3. Berne, S., Vagner, P., Guichard, E, Lericolais, G., Liu, Z., Trentesaux, A., Yin, P. and Yi, H. (2002) Pleistocene forced regressions and tidal sand ridges in the East China Sea. Mar. Geol., v. 3193, p. 1-23
  4. Dalrymple, R.W., Boyd, R. and Zaitlin, B.A. (1994) History of research, types and internal organization of incised-valley systems: Introduction to the volume. In Dalrymple, R.W, Boyd, R. and Zaitlin, B.A. (eds.) Incised-valley systems: Origin and sedimentary sequences. SEPM spec. pub. 51, p. 3-10
  5. Lericolais, G., Berne, S. and Fenies, H. (2001) Seaward pinching out and internal stratigraphy of the Gironde incised valley on the shelf (Bay of Biscay). Mar. Geol., v. 175, p. 183-197 https://doi.org/10.1016/S0025-3227(01)00134-7
  6. Liu, J.E, Milliman, J.D. and Gao, S. (2002) The Shandong mud wedge and post-glacial sediment accumulation in the Yellow Sea. Geo-Mar. Lett., v. 21, p. 212-218 https://doi.org/10.1007/s00367-001-0083-5
  7. Saito Y, Katayama, H., Ikehara, K., Kato, Y., Matsumoto, E., Oguri, K., Oda, M. and Yumoto, M. (1998) Trans-gressive and highstand systems tracts and post-glacial transgression, the East China Sea. Sed. Geol., v. 122, p. 217-232 https://doi.org/10.1016/S0037-0738(98)00107-9
  8. Thomas M.A. and Anderson, J.B. (1994) Sea-level controls on the fades architecture of the Trinity/Sabine incised-valley system, Texas continental shelf. In Dal-rymple, R.W., Boyd, R. and Zaitlin, B.A. (eds.) Incised-valley systems: Origin and sedimentary sequences. SEPM spec, pub., 51, p. 3-10
  9. Yang, C.S. (1989) Active, moribund and buried tial sand ridges in the East China Sea and the Southern Yellow Sea. Mar. Geol., v. 88, p. 97-116 https://doi.org/10.1016/0025-3227(89)90007-8
  10. Yang, Z., Saito, Y, Guo, Z. and Cui, Q. (1995) Distal mud area as a material sink in the East China Sea. In Tsu-nogai, S., Iseki, K, Koike, I. and Oba, T. (eds.) Global fluxes of carbon and its related substances in the coastal sea-ocean-atmosphere system. M and J international, Yokohama, p. 1-6
  11. Yoo, D.G., Lee, C.W., Kim, S.E, Jin, J.H., Kim, J.K. and Han, H.C. (2002) Late Quaternary transgressive and highstand systems tracts in the northern East China Sea mid-shelf. Mar. Geol., v. 82, p. 1-16 https://doi.org/10.1016/0025-3227(88)90003-5
  12. 한국해양연구원 (2002) 배타적 경제수역내 해양자원조사. 해양수산부
  13. Hu, D. (1994) Some striking features of circulation in Huanghai Sea and East China Sea. In Zhou, D., Liang, Y. and Zeng, C. (eds.) Oceanology of China Seas. Volume 1. Kluwer Academic Publ., p. 27-38
  14. Saito Y. (1998a) Sea level changes since the Last Glacial in the East China Sea. Quat. Res., v. 37, p. 235-242 (in Japanese) https://doi.org/10.4116/jaqua.37.235
  15. Van Wagoner, J.C., Mitchum, R.M., Campion, K.M. and Rahmanian, VD. (1990) Siliciclastic sequence stratigraphy in well logs, cores, and outcrops: Concepts for high-resolution correlation of time and facies. AAPG Methods Explo. Seri., 7, 55p
  16. Niino, H. and Emery, K.O. (1961) Sediments of the shallow portions of East China Sea and South China Sea. Geol. Soc. Am. Bull., v. 72, p. 731-762 https://doi.org/10.1130/0016-7606(1961)72[731:SOSPOE]2.0.CO;2
  17. Oh I.S. and Park, T. (2004) A numerical study on the dispersion of the Yangtze River water in the Yellow and East China Seas. J. Korean Soc. Oceanogr., v. 39, p. 119-134
  18. Milliman, J.D., Beardsely, R.C., Yang, Z.S. and Lime-burner, R. (1985a) Modern Huanghe-derived muds on the outer shelf of the East China Sea: identification and potential transport mechanism. Con. Shelf Res., v. 4, p. 175-188 https://doi.org/10.1016/0278-4343(85)90028-7
  19. Shi Y.L., Yang, W. and Ren, M.E. (1985) Hydrological characteristics of the Changjiang and its relation to sediment transport to the sea. Con. Shelf Res., v. 4, p. 5-15 https://doi.org/10.1016/0278-4343(85)90018-4
  20. Chen, Z., Song, B., Wang, Z. and Cai, Y. (2000) Late Quaternary evolution of the sub-aqueous Yangtze Delta, China: sedimentation, stratigraphy, palynology, and deformation. Mar. Geol., v. 162, p. 423-441 https://doi.org/10.1016/S0025-3227(99)00064-X
  21. Park, S.C., Yoo, D.G., Lee, K.W and Lee, H.H. (1999) Accumulation of recent muds associated with coastal circulations, southeastern Korea Sea (Korea Strait). Con. Shelf Res., v. 19, p. 589-608 https://doi.org/10.1016/S0278-4343(98)00106-X
  22. Ahn, Y.H., Shanmugam, P. and Gallegos, S. (2004) Evolution of suspended sediment patterns in the East China and Yellow Seas. J. Korean Soc. Oceanogr., v. 39, p. 26-34
  23. DeMaster, D.J., McKee, B.A., Nittrouer, C.A., Qin, J. and Cheng, G. (1985) Rates of sediment accumulation and particle reworking based on radiochemical measurements from continental shelf deposits in the East China Sea. Con. Shelf Res., v. 4, p. 143-158. https://doi.org/10.1016/0278-4343(85)90026-3
  24. Nummedal, D., Riley, G.W. and Templet, PL. (1993) High-resolution sequence architecture: a chronos-tratigraphic model based on equilibrium profile studies. In Posamentier, H.W, Summerhayes, C.R, Haq, B.U. and Allen, G.P. (eds.) Sequence Stratigraphy and Facies Associations. Int. Assoc. Sedimentol. Spec. Publ., 18, p. 55-68
  25. Beardsley, R.C., Limeburner, R., Yu, H., and Cannon, G.A. (1985) Discharge of the Changjiang (Yangtze River) into the East China Sea. Con. Shelf Res., v. 4, p. 57-76 https://doi.org/10.1016/0278-4343(85)90022-6
  26. Keller G.H. and Yincan, Y. (1985) Geotechnical properties of surface and near-surface deposits in the East China Sea. Con. Shelf Res., v. 4, p. 159-174 https://doi.org/10.1016/0278-4343(85)90027-5
  27. Saito Y. (1998b) Sedimentary environment and budget in the East China Sea. Bull. Coas. Oceanogr. Japan, v. 36, p. 43-58 (in Japanese with English abstract)
  28. Vail, P.R., (1987) Seismic stratigraphy interpretation using sequence stratigraphy. Part I. Seismic stratigraphy interpretation procedure. In Bally, A.W. (ed.) Atlas of Seismic Stratigraphy 1. AAPG Stud. Geol., 27, p. 1-10
  29. Park, S.C., Hong, S.K. and Kim, D.C. (1996) Evolution of late Quaternary deposits on the inner shelf of the South Sea of Korea. Mar. Geol., v. 131, p. 219-232 https://doi.org/10.1016/0025-3227(96)00006-0
  30. Butenko, J., Milliman, J.D. and Yincan, Y. (1985) Geo-morphology, shallow structure, and geological hazards in the East China Sea. Con. Shelf Res., v. 4, p. 121-141 https://doi.org/10.1016/0278-4343(85)90025-1
  31. Ichikawa, H. and Beardsley, R.C. (2002) The current system in the Yellow and East China Seas. J. Oceanogr., v. 58, p. 77-92 https://doi.org/10.1023/A:1015876701363
  32. Milliman, J.D., Shen, H.T., Yang, Z.S. and Meade, R.H. (1985b) Transport and depostion of river sediment in the Changjiang estuary and adjacent continental shelf. Con. Shelf Res., v. 4, p. 37-45 https://doi.org/10.1016/0278-4343(85)90020-2
  33. Posamentier, H.W. and Vail, PR. (1988) Eustatic controls on clastic deposition Il-Sequence and systems tract models. In Wilgus, C.K., Hastings, B.S., Kendall, C.G.SLC., Posamentier, H.W, Ross, C.A. and Van Wagoner, J.C. (eds.) Sea-level Changes-An Integrated Approach. SEPM Spec. Publ., 42, p. 125-154