Shallow gas in the central part of the Korea Strait shelf mud off the southeastern coast of Korea SCIE SCOPUS

DC Field Value Language Lee, GH - Kim, DC - Kim, HJ - Jou, HT - Lee, YJ - 2020-04-20T13:55:25Z - 2020-04-20T13:55:25Z - 2020-01-28 - 2005-10 -
dc.identifier.issn 0278-4343 -
dc.identifier.uri -
dc.description.abstract Shallow gas in the central part of the Korea Strait shelf mud (KSSM) off SE Korea, revealed by Chirp and sparker profiles, is associated with acoustic blanking, acoustic turbidity, seepages, and plumes in the water column. The low velocity of gas-charged sediments caused velocity pull-downs below the acoustic blanking and acoustic turbidity in sparker data. Assuming that the entire mud column below the acoustic blanking is gas-charged, the velocity effect of gas predicts that the velocities of the gas-charged sediments range from about 950 to over 1200 m/s, which are greater than the in situ velocities (<800m/s) measured using the Acoustic Lance. Alternatively, assuming that the velocity of gas-charged sediments is 800m/s, about 30-70% of the mud below the acoustic blanking are gas-charged. Gas samples from the cored sediments consist almost exclusively of methane and their delta(13)C values (-77 to -84 per mil) indicate biogenic gas. Abrupt seaward termination of the acoustic blanking at depth of about 102 m suggests that the pore water at this depth completely dissolves the methane. Assuming that the amount of methane dissolved in pore water at this depth represents the average concentration of methane and that the average porosity of the mud is 75%, we estimated the total volume of combined dissolved and gas-phase methane in the study area to be 5.44 x 10(6) m(3) at 15 degrees C and 1 atm. (c) 2005 Elsevier Ltd. All rights reserved. -
dc.description.uri 1 -
dc.language English -
dc.subject ECKERNFORDE BAY -
dc.subject BALTIC SEA -
dc.subject IN-SITU -
dc.subject VARIABILITY -
dc.subject SEDIMENTS -
dc.subject HYDRATE -
dc.subject FLOOR -
dc.title Shallow gas in the central part of the Korea Strait shelf mud off the southeastern coast of Korea -
dc.type Article -
dc.citation.endPage 2052 -
dc.citation.startPage 2036 -
dc.citation.volume 25 -
dc.citation.number 16 -
dc.identifier.bibliographicCitation CONTINENTAL SHELF RESEARCH, v.25, no.16, pp.2036 - 2052 -
dc.identifier.doi 10.1016/j.csr.2005.08.008 -
dc.identifier.scopusid 2-s2.0-26244434547 -
dc.identifier.wosid 000232819100008 -
dc.type.docType Article -
dc.description.journalClass 1 -
dc.subject.keywordPlus ECKERNFORDE BAY -
dc.subject.keywordPlus BALTIC SEA -
dc.subject.keywordPlus IN-SITU -
dc.subject.keywordPlus VARIABILITY -
dc.subject.keywordPlus SEDIMENTS -
dc.subject.keywordPlus HYDRATE -
dc.subject.keywordPlus FLOOR -
dc.subject.keywordAuthor shallow gas -
dc.subject.keywordAuthor acoustic blanking -
dc.subject.keywordAuthor acoustic turbidity -
dc.subject.keywordAuthor velocity pull-down -
dc.relation.journalWebOfScienceCategory Oceanography -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.relation.journalResearchArea Oceanography -
Appears in Collections:
Marine Environmental & Climate Research Division > Marine Active Fault Research Unit > 1. Journal Articles
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