Pore size controls on the base of the methane hydrate stability zone in the Kumano Basin, offshore Japan

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dc.citation.firstpage8021en_US
dc.citation.issueNumber22en_US
dc.citation.journalTitleGeophysical Research Lettersen_US
dc.citation.lastpage8028en_US
dc.citation.volumeNumber41en_US
dc.contributor.authorDaigle, Hughen_US
dc.contributor.authorDugan, Brandonen_US
dc.date.accessioned2015-01-06T19:20:35Z
dc.date.available2015-01-06T19:20:35Z
dc.date.issued2014en_US
dc.description.abstractThe base of the methane hydrate stability zone (MHSZ) in the Kumano Basin, offshore Japan, is marked by a bottom-simulating reflection (BSR) on seismic data. At Integrated Ocean Drilling Program Site C0002, which penetrates this BSR, the in situ temperature profile combined with bulk seawater methane equilibrium conditions suggest that the base of the MHSZ is 428 m below seafloor (bsf), which is 28 m deeper than the observed BSR (400 m bsf). We found that submicron pore sizes determined by mercury injection capillary pressure are sufficiently small to cause 64% of the observed uplift of the base of the MHSZ by the Gibbs-Thomson effect. This is the most thorough characterization of pore sizes within the MHSZ performed to date and illustrates the extent to which pore size can influence MHSZ thickness. Our results demonstrate the importance of considering lithology and pore structure when assessing methane hydrate stability conditions in marine sediments.en_US
dc.identifier.citationDaigle, Hugh and Dugan, Brandon. "Pore size controls on the base of the methane hydrate stability zone in the Kumano Basin, offshore Japan." <i>Geophysical Research Letters,</i> 41, no. 22 (2014) American Geophysical Union: 8021-8028. http://dx.doi.org/10.1002/2014GL062135.
dc.identifier.doihttp://dx.doi.org/10.1002/2014GL062135en_US
dc.identifier.urihttps://hdl.handle.net/1911/78901
dc.language.isoengen_US
dc.publisherAmerican Geophysical Union
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.subject.keywordmethane hydrateen_US
dc.subject.keywordNankai Troughen_US
dc.subject.keywordbottom-simulating reflectionen_US
dc.subject.keywordIODPen_US
dc.subject.keywordNanTroSEIZEen_US
dc.titlePore size controls on the base of the methane hydrate stability zone in the Kumano Basin, offshore Japanen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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