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논문 기본 정보

자료유형
학위논문
저자정보

구본영 (충남대학교, 忠南大學校 大學院)

지도교수
정공수
발행연도
2014
저작권
충남대학교 논문은 저작권에 의해 보호받습니다.

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초록· 키워드

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Multi-beam echosounder and grain size data of surface sediment and high resolution seismic data were acquired and analyzed in order to investigate the shelf-to-slope morphology, acoustic facies, and their controlling factors in the southwestern margin of the Ulleung Basin. The continental shelf can be divided into two parts: (1) shallow (∼100 m) and steep (0.5°) inner shelf, (2) deep (100-300 m) and gentle (0.2°) outer shelf. The continental slope is featured with eight distinct topographic depressions of various spatial dimension (∼121 ㎢ in area) and head wall gradient (∼24.3°). They are developed adjacent to each other and presumably formed by submarine landslides which have recurred under the strong influences of earthquakes and eustatic sea-level change. The inner continental shelf and the continental slope are dominated by fine-grained sediment, whereas the outer continental shelf is dominated by coarse-grained sediment. The surface sediment distribution seems dominantly influenced by eustatic sea-level change. The outer continental shelf is mostly covered by coarse relict sediment deposited during lowstand sea-level, while the inner shelf is covered with recent sediment during highstand sea-level. The surface of the continental slope is covered with fine-grained sediments which were supplied by hemipelagic advection process.

목차

1. 서론 1
2. 연구지역 4
3. 연구재료 및 방법 7
4. 연구결과 10
4.1. 울릉분지 남서부의 지형특징 10
4.2. 해저사태 지형특징 12
4.3. 표층퇴적물 입도분포 특징 22
4.4. 음향상분포 특징 25
5. 토의 38
5.1. 해저지형 38
5.2. 해저 퇴적물 분포 42
5.3. 음향상 분포 44
6. 결론 45
7. 참고문헌 47
ABSTRACT 54

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