Distribution and origin of shallow gas in deep-sea sediments of the Ulleung Basin, East Sea (Sea of Japan) SCIE SCOPUS

Cited 20 time in WEB OF SCIENCE Cited 20 time in Scopus
Title
Distribution and origin of shallow gas in deep-sea sediments of the Ulleung Basin, East Sea (Sea of Japan)
Author(s)
Lee, SH; Chough, SK
KIOST Author(s)
Lee, Sang Hoon(이상훈)
Publication Year
2003-03
Abstract
A synthesis of high-resolution (Chirp, 2-7 kHz) subbottom profiles in the Ulleung Basin reveals patchy distribution of shallow (< 90 in subbottom depth) gassy sediments in the eastern basin plain below 1,800-m water depth. The shallow gases in the sediments are associated with acoustic turbidities, columnar acoustic blankings, enhanced reflectors, dome structures, and pockmarks. Analyses of gas samples collected from a piston core in an earlier study suggest that the shallow gases are thermogenic in origin. Also, published data showing high amounts of organic matter in thick sections of marine shale (middle Miocene to lower Pliocene sequence) and high heat flow in the basin plain sediments are consistent with the formation of deep, thermogenic gas. In multichannel deep seismic profiles, numerous acoustic chimneys and faults reflect that the deep, thermogenic gas would have migrated upwards from the deeper subsurface to the near-seafloor. The upward-migrating gases may have accumulated in porous debrites and turbidites (upper Pliocene sequence) overlain by impermeable hemipelagites (Quaternary sequence), resulting in the patchy distribution of shallow gases on the eastern basin plain.
ISSN
0276-0460
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5541
DOI
10.1007/s00367-002-0114-x
Bibliographic Citation
GEO-MARINE LETTERS, v.22, no.4, pp.204 - 209, 2003
Publisher
SPRINGER-VERLAG
Subject
CONTINENTAL-MARGIN; MARINE-SEDIMENTS; FEATURES; GREECE; KOREA; SHELF; MUDS
Type
Article
Language
English
Document Type
Article
Publisher
SPRINGER-VERLAG
Related Researcher
Research Interests

Marine Geology,Marine Sedimentary Environments and Processes,Submarine slope failures and stability,해양지질,해양퇴적 환경 및 작용,해저사면 사태 및 안정성

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