Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Classification of Deep-sen Sediment by Geotechnical Properties from the KODOS Area in the C-C Zone of the Northeast Equatorial Pacific

북동태평양 클라리온-클리퍼톤 균열대 KODOS 지역 심해저 퇴적물의 지질공학적 특성에 따른 유형분류

  • 지상범 (한국해양연구원 해저환경자원연구본부 심해저자원연구센터) ;
  • 형기성 (한국해양연구원 해저환경자원연구본부 심해저자원연구센터) ;
  • 김종욱 (한국해양연구원 해저환경자원연구본부 심해저자원연구센터) ;
  • 김현섭 (한국해양연구원 해저환경자원연구본부 심해저자원연구센터) ;
  • 이근창 (한국해양연구원 해저환경자원연구본부 심해저자원연구센터) ;
  • 손승규 (한국해양연구원 해저환경자원연구본부 심해저자원연구센터)
  • Published : 2003.12.31
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Abstract

Deep-sea surface sediments, acquired from 1997 to 2002 in the Clarion-Clipperton fracture zone of the northeast equatorial Pacific, were analyzed for index and geotechnical properties to provide background information for the design of manganese nodule minor. The sediments were classified into 16 types based on the measured properties and evaluated in terms of miner maneuverabillity and potential environmental impacts arising from mining activities. It was found that the middle part of the study area covered with coarse siliceous sediments is more favorable to the commercial production than the northern part of pelagic red clay. In particular, Area B2 in the middle part is considered the best mining site since it shows the highest abundance as well as it consists mostly of normally to over consolidated (types B, C, D) coarse siliceous sediments that are appropriate for effective minor movement and accompany weak environmental impacts. Taking account of all the analyzed core logs, the average shear-strength values are proposed as a practical guideline fur movements of a manganese nodule miner: 6.0 kPa at 10cm and 7.0kPa at 40cm below the seabed.

Keywords

References

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