서해 경기만에서의 고해상도 탄성파 탐사를 이용한 퇴적환경 및 퇴적층서 연구 KCI

Title
서해 경기만에서의 고해상도 탄성파 탐사를 이용한 퇴적환경 및 퇴적층서 연구
Alternative Title
Sedimentary Environment and Sequence Study using High Resolution Seismic Survey in Gyunggi Bay, the Yellow Sea
Author(s)
이광수; 김대철; 서영교; 이희일; 유신
Publication Year
2009-12
Abstract
High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sedimentary sequence and distribution pattern of the late Holocene deposits in Gyunggi Bay, the Yellow Sea. The bay is located in the western part of Korea, east of the Yellow Sea. The sedimentary sequence divided into three units bounded by erosional bounding surface: (1) acoustically parallel to subparallel reflectors with cross bedding structures (Unit 1); (2) confused inner reflectors and top of unit exposed partially at the seafloor (Unit 2); and (3) approximately parallel reflections and regressive to transgressive incision-fills (Unit 3). On the basis of seafloor morphology, surface bedforms, and subbotom acoustic characters, echo types in the study area were identified following the schemes of Chough et al. (2002); (1) flat seafloor with sharp bottom echoes (echo types 1-1, 1-2 and 1-3; transgressive sediment sheets or relict sands), (2) mounded seafloor with either smooth surface or superposed bedforms (echo types 2-1 and 2-2; tidal ridges), and (3) various-scale eroded seafloor (echo types 3-1 and 3-2; channels). Suspect features of acoustic turbid zones which is related to gas charged sediment are reported.
ISSN
0374-8111
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1840
Bibliographic Citation
한국수산과학회지, v.42, no.6, pp.683 - 694, 2009
Publisher
한국수산과학회
Keywords
Gyunggi Bay; Sedimentary sequence; Sedimentary environment; Echo type; High resolution seismic survey
Type
Article
Language
Korean
Publisher
한국수산과학회
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