Occurrence of near-seafloor gas hydrates and associated cold vents in the Ulleung Basin, East Sea SCIE SCOPUS KCI

DC Field Value Language
dc.contributor.author Bahk, Jang-Jun -
dc.contributor.author Kim, Ji-Hoon -
dc.contributor.author Kong, Gee-Soo -
dc.contributor.author Park, Yosup -
dc.contributor.author Lee, Huen -
dc.contributor.author Park, Youngjun -
dc.contributor.author Park, Keun Pil -
dc.date.accessioned 2020-04-20T09:40:05Z -
dc.date.available 2020-04-20T09:40:05Z -
dc.date.created 2020-01-28 -
dc.date.issued 2009-12 -
dc.identifier.issn 1226-4806 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/4235 -
dc.description.abstract During the site survey for drill sites of the Ulleung Basin Gas Hydrate Expedition 1, near-seafloor gas hydrates were discovered in core sediments from basin plain (2010-2130 m water depth) and southern slope (820-1160 m). The gas hydrates were exclusively retrieved from the sites of high backscatter intensity anomalies of 13 kHz multi-beam echosounding, implying high seafloor reflectivity. In high-resoltition (2-7 kHz) subbottom profiles, the coring sites are also characterized by narrow (250-850 m wide) acoustic blank zones reaching seafloor, where they have surface expressions of low-relief (<about 5 m high) mounds; and/or pockmarks. In the record of a 38 kHz split-beam echosounder, which was deployed for acoustic characterization of gas bubbles in the water column, there are no apparent gas flares associated with the blank zones. The recovered gas hydrates take the forms of massive layer, blocky nodule, or platy vein in mud at 0.5 to 8 m below the core tops. They were sometimes associated with abundant scattered authigenic carbonate nodules. Compositional and structural analyses of selected gas hydrate samples revealed that they consist of structure I hydrates containing more than 99% biogenic methane. Gas and porewater compositions of the core sediments also imply relatively high upward flux of biogenic methane. The results of the site survey cruise collectively suggest that the near-seafloor gas hydrates are related to cold vents where abundant gas hydrates and authigenic carbonates comprises acoustically high seafloor reflectivity. Gas seeping activity in the cold vents appears to be currently dormant. -
dc.description.uri 1 -
dc.language English -
dc.publisher SPRINGER HEIDELBERG -
dc.subject DNEPR PALEO-DELTA -
dc.subject BLACK-SEA -
dc.subject JAPAN SEA -
dc.subject CONTINENTAL-SLOPE -
dc.subject MARINE-SEDIMENTS -
dc.subject CASCADIA MARGIN -
dc.subject METHANE FLUX -
dc.subject DEEP-WATER -
dc.subject CONSTRAINTS -
dc.subject SEEPS -
dc.title Occurrence of near-seafloor gas hydrates and associated cold vents in the Ulleung Basin, East Sea -
dc.type Article -
dc.citation.endPage 385 -
dc.citation.startPage 371 -
dc.citation.title GEOSCIENCES JOURNAL -
dc.citation.volume 13 -
dc.citation.number 4 -
dc.contributor.alternativeName 박요섭 -
dc.identifier.bibliographicCitation GEOSCIENCES JOURNAL, v.13, no.4, pp.371 - 385 -
dc.identifier.doi 10.1007/s12303-009-0039-8 -
dc.identifier.scopusid 2-s2.0-77952803458 -
dc.identifier.wosid 000273392000005 -
dc.type.docType Article -
dc.description.journalClass 1 -
dc.subject.keywordPlus DNEPR PALEO-DELTA -
dc.subject.keywordPlus BLACK-SEA -
dc.subject.keywordPlus EAST/JAPAN SEA -
dc.subject.keywordPlus CONTINENTAL-SLOPE -
dc.subject.keywordPlus MARINE-SEDIMENTS -
dc.subject.keywordPlus CASCADIA MARGIN -
dc.subject.keywordPlus METHANE FLUX -
dc.subject.keywordPlus DEEP-WATER -
dc.subject.keywordPlus CONSTRAINTS -
dc.subject.keywordPlus SEEPS -
dc.subject.keywordAuthor gas hydrates -
dc.subject.keywordAuthor cold vents -
dc.subject.keywordAuthor acoustic backscatter -
dc.subject.keywordAuthor Ulleung Basin -
dc.subject.keywordAuthor East Sea -
dc.relation.journalWebOfScienceCategory Geosciences, Multidisciplinary -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.description.journalRegisteredClass kci -
dc.relation.journalResearchArea Geology -
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