DOI QR코드

DOI QR Code

Development of Sedimentary Sequence in the Masan Bay, South Sea of Korea

마산만 퇴적층서 발달 특성

  • 최동림 (한국해양연구원 남해연구소) ;
  • 이태희 (한국해양연구원 남해연구소)
  • Published : 2007.12.30

Abstract

We studied the bottom morphology and sedimentary environments of the Masan Bay using high-resolution Chirp seismic profiles and sediments data. According to deep-drilled core samples (up to 20 m thick) penetrated into the weathered rock basement, the sediments consist largely of three sediment types: the lower sandy gravel facies (Unit I) of 1-4 m in thickness, the middle sandy mud and/or muddy sand facies(Unit II) of 1-2 m thick and the upper mudfacies (Unit III) of over 10 m in thickness. The sedimentary column above the acoustic basement can be divided into two major sequences by a relatively strong mid-reflector, which show the lower sedimentary sequenc e(T) with parallel to subparallel internal reflectors and the upper sedimentary sequence(H) with free acoustic patterns. Acoustic basement, the lower sedimentary sequence (T), and the upper sequence (H) are well correlated with poorly sorted massive sandy gravels (Unit I), the sand/mud-mixed sediment (Unit II), and the muddy facies(Unit III), respectively. The acoustic facies and sediment data suggest that the Masan bay is one of the most typical semi-enclosed coastal embayments developed during the Holocene sea-level changes. The area of the Masan Bay reduced from about $19\;km^2$ in 1964 to about $13\;km^2$ in 2005 by reclamation, and its bottom morphology changed as a result of dredging of about $2{\times}10^7\;m^3$.

Keywords

References

  1. 마산시. 1994. 마산만 준설에 따른 해양환경 종합 모니터링보고서. 264 p
  2. 박용안, 이창복, 최진혁. 1984. 광양만의 퇴적환경에 관한 연구. 한국해양학회지, 19, 82-88
  3. 우한준, 김효영, 정갑식, 천종화, 김성은, 추용식. 1999. 마산만 퇴적환경 오염에 따른 저서성 유공충분포 변화. 한국해양학회지 바다, 4, 144-154
  4. 우한준, 조진형, 정갑식, 정창수, 권수재, 박성민. 2003. 중금속 원소와 유공층을 이용한 마산만 퇴적물의 오염역사에 관한 연구. 한국지구과학회지, 24(7), 635-649
  5. 최동림, 현상민, 이태희. 2003. 한반도 남해안 광양만의 최근 지형변화 및 후기 제4기 퇴적 층서 발달. 한국해양학회지 바다, 8(1), 35-43
  6. 한국해양연구원. 1999. 진해 마산만 수질환경 관리모델 개발(II). BSPE98703-01-1147-2. 395 p
  7. 한국해양연구원. 2003. 연안역에서의 육지와 해양 상호작용 연구 (1)남해 동부연안역의 영양 물질 유입과 생물 생산력 개발 환경조성 기반기술. BSPE827-01-1493-4. 505 p
  8. 현대건설(주). 2001. 마창대교 가설공사 보고서. 107 p
  9. Chang, J.H. and J.Y. Choi. 2001. Tidal flat sequence controlled by Holocene sea-level rise in Gomso Bay, west coast of Korea. Estuar. Coast. Shelf Sci., 52, 391-399 https://doi.org/10.1006/ecss.2000.0745
  10. Folk, R.L. 1954. The distribution between grain size and mineral composition in sedimentary rock nomenclature. J. Geol., 62, 334-359 https://doi.org/10.1086/626171
  11. Kang, H.J. and S.K. Chough. 1982. Gamagyang Bay, southern coast of Korea: Sedimentation on a tidedominated rocky embayment. Mar. Geol., 48, 197-214 https://doi.org/10.1016/0025-3227(82)90097-4
  12. Kim, Y.H., H.J., Lee, S.S., Chun, S.J., Han, and S.K. Chough. 1999. Holocene transgressive stratigraphy of a macrotidal flat in the south-eastern yellow sea: Gomso Bay, Korea. J. Sed. Res., 69, 328-337 https://doi.org/10.2110/jsr.69.328
  13. Park, S.C., K.W. Lee, and Y.I. Song. 1995. Acoustic characters and distribution pattern of mordern finegrained deposits in a tide-dominated coast bay: Jinhae Bay, Southeast Korea. Geo-Mar. Lett., 15, 77-84 https://doi.org/10.1007/BF01275410
  14. Park, S.C., Y.S. Kim, and S.K. Hong. 1991. Shallow seismic stratigraphy and distribution pattern of late Quaternary sediments in a macrotidal bay: Gunhung Bay, west coast of Korea. Mar. Geol., 98, 135-144 https://doi.org/10.1016/0025-3227(91)90041-2
  15. Reading, H.G. 1996. Sedimentary environments: Processes, facies and stratigraphy, 3rd ed., Blackwell Science, 688 p
  16. Reineck, H.-E. and I.B. Singh. 1980. Depositional sedimentary environments with reference to terrigenous clastics. Springer-Verlag, 549 p

Cited by

  1. Development of the Holocene Sediments in Gamak Bay of the South Sea, Korea vol.19, pp.2, 2014, https://doi.org/10.7850/jkso.2014.19.2.131