Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Physical Properties of Surface Sediments from the KR(Korea Reserved) 5 Area, Northeastern Equatorial Pacific

북동태평양 대한민국 광구 KR5 지역 표층퇴적물의 물리적 특성

  • 이현복 (한국해양연구원 해양자원연구본부) ;
  • 지상범 (한국해양연구원 해양자원연구본부) ;
  • 형기성 (한국해양연구원 해양자원연구본부) ;
  • 박정기 (한국해양연구원 해양자원연구본부) ;
  • 김기현 (한국해양연구원 해양자원연구본부) ;
  • 오재경 (인하대학교 해양과학과)
  • Published : 2006.12.31
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Abstract

In order to reveal the vertical variation of physical properties in deep-sea sediments, deep-sea sediment cores were collected at 78 stations using a multiple corer in the KR5 area, one of the Korea contract areas for manganese nodule exploration, located in the northeast equatorial Pacific. Based on the color of sediments, sampled sediment cores were characterized into three lithologic units (unit 1,2, and 3). In all sediment cores, three units appear systematically; unit 1 lies at the top of cores and unit 2 and/or unit 3 appear to underlie unit 1 or alternate with unit 3. Unit 1 layer from the top of cores shows dark grayish brown to dark brown with mean thickness of 10.2cm. Unit 2 and 3 layers show very dark brown to black color and yellowish brown to brown color, respectively. According to the physical properties of the deep-sea sediment cores, sediment column can be divided into three sections. Section A $(0{\sim}15cm)$ in subbottom depth consists mostly of unit 1. Mean values of physical properties of section B $(15{\sim}30cm)$ in subbottom depth are similar to those of section C (>30 cm) in subbottom depth. However, the physical properties of section B were more variable than those of section C because of the high activity of bioturbation in section B. These results will provide valuable information for selecting suitable sites for mining manganese nodules in the Korea contract areas.

Keywords

References

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  2. Nonparametric approach for uncertainty-based multidisciplinary design optimization considering limited data vol.54, pp.6, 2016, https://doi.org/10.1007/s00158-016-1540-0
  3. Regional Variability of Manganese Nodule Facies in the KR1 Area in KODOS Area, Northeastern Equatorial Pacific vol.45, pp.5, 2012, https://doi.org/10.9719/EEG.2012.45.5.477