Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Geoacoustic Properties of Marine Sediment Adjacent the Southwestern Taean Peninsula, the Yellow Sea

황해 태안반도 남서부 해양퇴적물의 지음향 특성

  • Kim, HwaRang (UR Interdisciplinary Program of Hydrography, Pukyong National University) ;
  • Kim, Dae-Choul (Department of Energy Resource Engineering, Pukyong National University) ;
  • Seo, YoungKyo (Gematek Corporation) ;
  • Lee, Gwang-Soo (Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, KyongO (Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 김화랑 (부경대학교 수로학연협동과정) ;
  • 김대철 (부경대학교 에너지자원공학과) ;
  • 서영교 (지마텍(주)) ;
  • 이광수 (한국지질자원연구원 석유해저연구본부) ;
  • 김경오 (한국지질자원연구원 석유해저연구본부)
  • Received : 2016.02.29
  • Accepted : 2016.08.26
  • Published : 2016.11.25
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Abstract

Physical and acoustic properties of sediment on the southwestern Taean Penisula, the Yellow Sea, were studied using eight piston cores. The sediments in the study area are largely composed of sand which has been deposited with sea-level change after LGM(Last Glacial Maximum). After the sea-level rise, fine-grained sediments discharged from Keum River and neighboring coast area were deposited as muddy sand or sandy mud. Results of these sedimentary environment in this area, the texture of sediments are different from place to place with variable horizontal and vertical distribution of physical and acoustic properties. Correlations among the physical, geoacoustic properties, and mean grain size show slight deviations from those of the South Sea in spite of similar pattern. This is probably due to the differences in sedimentary environment, mineral composition, and measurement system.

황해 태안반도 남서부 해역 8개 정점에서 해양퇴적물을 채취하여 퇴적물의 지음향 및 물리적 특성을 파악하였다. 전반적으로 사질 퇴적물이 우세하며 연구지역의 사질 퇴적물은 최대빙하기(LGM)이후 해수면 변동의 영향을 받아 연구지역에 퇴적되었다. 이후 금강 및 인근 연안에서 유입된 세립질퇴적물의 영향을 받은 지역은 니질 사 또는 사질 니가 발달했다. 이러한 퇴적 환경의 영향으로 정점별로 퇴적물 조직특성, 물리적 성질, 음파전달속도의 수평 수직적 차이가 나타난다. 음파전달속도, 평균입도 및 물리적 성질간의 상관관계를 보면 비교모델로 사용한 남해 퇴적물과 전반적으로 유사한 경향을 보이나 절대값에서 차이를 보인다. 이러한 차이는 퇴적환경, 광물조성 및 측정 시스템의 차이에 의한 것으로 사료된다.

Keywords

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