- 북동태평양 클라리온-클리퍼톤 지역 심해저 표층 퇴적물의 지질공학적 특성 연구
- ㆍ 저자명
- 지상범,오재경,이현복,김기현,Chi. Sang-Bum,Oh. Jae-Kyung,Lee. Hyun-Bok,Kim. Ki-Hyun
- ㆍ 간행물명
- Ocean and polar research
- ㆍ 권/호정보
- 2003년|25권 2호|pp.133-145 (13 pages)
- ㆍ 발행정보
- 한국해양연구원
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Deep-sea surface sediments were collected using a multiple corer at 20 stations of Clarion-Clipperton fracture zone in the northeast equatorial Pacific to understand latitudinal and longitudinal variations of geotechnical properties. There was a distinct latitudinal variation of geotechnical properties in the study area. The northern sediments showed finer grain size, lower water content and porosity, higher bulk density and specific grain density, lower liquid limits and plastic limits than their southern counterparts. The northern sediments are classified into inorganic clays of low plasticity (fat clays) on plasticity charts and normal to active clay on activity chart, whereas, the southern sediments are classified into fine-grained, highly-plastic, inorganic and biogenic silt or organic clays on plasticity chart and normal to very active clay on activity chart. When shear strength are considered, the northern sediments were found to be in unconsolidated states, while the southern ones to be normal to over-consolidated states. These latitudinal variations in sediment characteristics are likely caused by differences in productivity of surface water that controls sediment compositions, sedimentation rates, and grain solubility.