동해 울릉분지 서부주변부 사면사태와 중력류 퇴적체의 상관관계

Title
동해 울릉분지 서부주변부 사면사태와 중력류 퇴적체의 상관관계
Alternative Title
Correlation between slope failures and downslope mass-transport deposits along the western margin of Ulleung Basin, East Sea (Japan Sea)
Author(s)
이상훈; 박장준; 김한준; 주형태; 전형구; 엄인권; 유동근; Cukur
KIOST Author(s)
Lee, Sang Hoon(이상훈)Kim, Han Joon(김한준)Jou, Hyeong Tae(주형태)
Publication Year
2018-05-24
Abstract
In continental margins, slope failures (failing areas or scars) and related downslope mass-transport deposits are basic stratigraphic elements, providing important clues for understanding the development of continental-margin sequences andtheir controlling factors (relative sea-level, tectonics, sediment supply, etc.). In the western margin of the Ulleung Basin, an isolated slope-failure system, consisting of arcuate failure scars (ca. 13 km x 9 km in area) with head scarps(up to ca. 50 m high) occurs on the present upper to middle slope areas (550 to 850 m in water depth) and connects downslope to the gully. Within an isolated slope-failure system, small-scale, elongated failure scars and scarps are presentbelow the head scarps. Several tongue-shaped bodies of mass-transport deposits (MTDs) have been deposited at the base-of-slope, just downslope of the gully. These tongue-shaped bodies of MTDs are acoustically transparent or chaotic and separated by intervals of stratified reflectors on seismic profiles. The uppermost body of MTDs consists of four sedimentary facies and were deposited between ca. 11.0 and 17.1 cal. ka B.P., implying the deposition of the lower bodies of MTDs prior to ca. 17.1 cal. ka B.P. In contrast, three acquired core sediments in the slope failing areas mostly show continuous deposition since at least 60-61 ka without slope failures. These features suggest that the present slope-failure morp
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23288
Bibliographic Citation
2018년 한국해양과학기술협의회 공동학술대회, pp.205, 2018
Publisher
한국해양과학기술협의회
Type
Conference
Language
English
Publisher
한국해양과학기술협의회
Related Researcher
Research Interests

Marine Geophysics,Marine Active Fault Study,Exploration Seismology,해양지구물리,해저단층연구,탄성파탐사

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse