지질공학 (The Journal of Engineering Geology)

  • 제16권2호
  • /
  • Pages.161-169
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  • 2006
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  • 1226-5268(pISSN)
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  • 2287-7169(eISSN)
대한지질공학회 (The Korean Society of Engineering Geology)
권호 표지

곰소만 지역의 기반암 및 상부 층서 파악을 위한 시험 탄성파반사법 탐사

A Short Seismic Reflection Survey for Delineating the Basement and the Upper Units of the Gomso Bay, Yellow Sea

  • 김지수 (충북대학교 지구환경과학과.기초과학연구소) ;
  • 양우헌 (전북대학교 과학교육학부.과학교육연구소) ;
  • 한수형 (지오제니 컨설턴트) ;
  • 김학수 (지오제니 컨설턴트)
  • Kim Ji-Soo (Dept. of Earth & Environmental Sci. & Institute for Basic Science Research, Chungbuk National University) ;
  • Ryang Woo-Hun (Division of Science Education.Institute of Science Education, Chonbuk National University) ;
  • Han Soo-Hyung (Geogeny Consultant) ;
  • Kim Hak-Soo (Geogeny Consultant)
  • 발행 : 2006.06.01
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초록

곰소만의 기반암과 상부 층서들을 규명하기 위해 짧은 측선의 탄성파 반사법탐사가 수행되었다. 이 연구는 주로 자료 처리에서 신호대잡음을 높임으로써 기반암을 규명하는데 초점을 두었다. 자료처리의 주요과정은 종합 전후과정에서 모두 큰 진폭의 잡음에 가려진 신호성분을 향상시키는데 중점을 두었으며 시변필터, 불량 트레이스 제거, f-k 필터와 NMO 보정 후의 뮤팅 등이 이에 포함된다. 이 연구에서 규명된 기반암과 상부 층서들은 이전에 수행된 MT자료의 결과와 대체로 일치하며 당시에 자료질의 한계로 규명되지 못한 측선 중앙부근에서 기반암 표면이 약 30m 깊이의 수평층으로 나타났다.

A short seismic reflection survey was performed to map the basement and the upper units in the Gomso Bay. This research was mainly aimed at clarifying the basement by improving the signal-to-noise ratio in data processing steps. The strategies employed in this research included enhancement of the signal interfered with large-amplitude noise, through pre- and post-stack processing such as time-variant filtering, bad trace edit, careful muting after f-k filter and NMO correction. The subsurface structure mapped from this survey mainly consists of the top of basement and the upper three units, which were well correlated to the result from the previously conducted MT survey. Furthermore seismic section clarifies approximately 30m deep subhorizontal event of the top of the basement, which was not shown in the central portion of the MT section due to data qualify.

키워드

참고문헌

  1. 고철환, 2001, 한국의 갯벌, 서울대학교 출판부, 1073
  2. 조창수, 이희일, 서정희, 2002, 탄성파 굴절법 토모그래 피를 이용한 지반의 속도분포 해석, 물리탐사, 5, pp.6-17
  3. 해양수산부, 1998, 우리나라의 갯벌
  4. 홍종국, 김기영, 김한준, 1999, 조간대지역에서의 고해상 탄성파탐사를 위한 파원 특성분석, 지구물리, 2, 2, pp.100-110
  5. Butenko, J., Milliman, J.D., Ye, Y.C., 1985. Geomorphology, shallow structure, and geological hazards in the East China Sea. Cont. Shelf Res. 4, pp.121-142 https://doi.org/10.1016/0278-4343(85)90025-1
  6. Cho, C.S., Lee, H.I. and Suh, J.H., 2002, interpretation on the subsurface velocity structure by seismic refraction tomography, Korean Society of Exploration Geophysicists, 5, pp.6-17
  7. Choi, K.S., 2001, Late Quaternary Stratigraphy and Evolution of Tidal Deposits in Kyunggi Bay, West Coast of Korea. Ph.D. thesis, Seoul National University, Seoul, 225p
  8. Chough, S.K. and Kim, D.C., 1981. Dispersal of fine- grained sediments in the southeastern Yellow Sea: A steady-state model. JSP., 51, pp.721-728
  9. Chough, S.K., Lee, H.J., and Yoon, S.H., 2000, Marine Geology of Korean Seas, Elsevier, Amsterdam, 313
  10. Kim, Y.H., Lee, H.J., Chun, S.S., Han, S.J., Chough, S.K., 1999. Holocene transgressive stratigraphy of a macrotidal flat in the southeatern Yellow Sea: Gomso Bay, Korea. J. Sediment. Res. 69, pp.328-337 https://doi.org/10.2110/jsr.69.328
  11. Lee, H.J. and Chough, S.K., 1989. Sediment distribution, dispersal and budget in the Yellow Sea. Marine Geol., 87 pp.195-205 https://doi.org/10.1016/0025-3227(89)90061-3
  12. Lee, H.J., Chun, S.S., Chang, J.H. and Han, S.J., 1994, Landward migration of isolated shelly sand ridge (chenier) on the macrotidal flat of Gomso Bay, west coast of Korea: controls of storms and typhoon. Journal of Sedimentary Research, A64, pp.886-893
  13. Lim, D.I., 2001, Late Quaternary Stratigraphy and Sedimentology of Tidal-flat Deposits, Western Coast of Korea. Ph.D. thesis, Seoul National University, Seoul, 303p
  14. Lim, D.I. and Park, Y.A., 2003, Late Quaternary stratigraphy and evolution of a Korean tidal flat, Haenam Bay, southeastern Yellow Sea, Korea. Marine Geology, 193, pp.177-194 https://doi.org/10.1016/S0025-3227(02)00663-1
  15. Milliman, J.D. et al., 1989. Sediments and sedimentary processes in the Yellow and East China Seas. In: Sedimentary facies in the active plate margin (eds., Taira, A. and Masuda, F.) Terra Sci. Publ. Comp., Tokyo, pp.233-249
  16. National Geography Institute, 1981, Basic research report on nearshore environments of Korea (Seokpo area). Seoul, 56p
  17. Park, Y.A., Lim, D.I., Choi, J.Y. and Lee, Y.G., 1997, Late Quaternary stratigraphy of the tidal deposits in Hampyung Bay, southwest coast of Korea. Journal of Korean Society of Oceanography, The Sea, 2, pp. 138-150. (in Korean with English abstract)
  18. Pirazzoli, P.A., 1991. World Atlas of Holocene Sea-Level Changes. Elsevier, New York, 300p
  19. Ryang, W.H. and Shon, H., 2003, High-frequency magnetotelluric data of tidal deposits: Gomso Bay, southwest coast of Korea, Geosciences Journal 7, pp. 293- 298 https://doi.org/10.1007/BF02919559
  20. SU, 2000, Seismic Unix, Colorado School of Mines
  21. Vista, 1999, seismic data processing software, SIS Ltd., Canada