Structural Evolution of the Kunsan Basin, Southern Yellow Sea

Title
Structural Evolution of the Kunsan Basin, Southern Yellow Sea
Author(s)
한상훈; 이광훈; 유해수; 민동주; 김한준
KIOST Author(s)
Kim, Han Joon(김한준)
Publication Year
2007-10-25
Abstract
We have identified and mapped nine regional unconformities including the top acoustic basement in the Kunsan Basin in the Southern Yellow Sea from multi-channel seismic reflection data. The depths of the acoustic basement range from less then 400 m in the southern part of the area to over 8000 m in the two depocenters. The acoustic basement in the western part of area is dominated by the EW- and NW-trending normal faults. The large fault cutting the basement in the northern part of the area turns southward in the east, forming the northern and eastern boundaries of the SE Subbasin in the northwestern part of the area. The Central Subbasin is bounded to the south by the EW-trending normal fault with a vertical throw of more than 1.0 second two-way travel time. Restoration of depth-converted seismic profiles suggests that the southern part of the SW Subbasin experienced rapid subsidence in the south during the Paleocene-Early Eocene, accommodating thick sediment accumulation, followed by a minor inversion in the north in the Middle-Late Eocene. In the Eocene, the southeastern part of the SW Subbasin and the area northwest of the depocenter of this subbasin underwent significant uplift. This contractional tectonic movement probably resumed briefly in the Early Miocene. The western part of the SW Subbasin appears to have remained shallow until the Middle Eocene (?). In the Late Eocene, significant uplift occurred over much of the western part of the SW Subbasin. An inversion continued locally in the south-southwestern part of the SW subbasin.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/30278
Bibliographic Citation
2007 추계지질학회 - 강원대학교, pp.149, 2007
Publisher
지질학회
Type
Conference
Language
English
Publisher
지질학회
Related Researcher
Research Interests

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

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