{"refrec":{"BRefID":208976,"RR":"<b>Hachikubo, A.; Khlystov, O.; Krylov, A.; Sakagami, H.; Minami, H.; Nunokawa, Y.; Yamashita, S.; Takahashi, N.; Shoji, H.; Nishio, S.; Kida, M.; Ebinuma, T.; Kalmychkov, G.; Poort, J.</b> (2010). Molecular and isotopic characteristics of gas hydrate-bound hydrocarbons in southern and central Lake Baikal. <i>Geo-Mar. Lett. 30(3-4)</i>: 321-329. <a href=\"http://dx.doi.org/10.1007/s00367-010-0203-1\" target=\"_blank\">dx.doi.org/10.1007/s00367-010-0203-1</a>","BEntID":200964,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Geo-Mar. Lett. 30(3-4)</i>: 321-329. <a href=\"https://dx.doi.org/10.1007/s00367-010-0203-1\" target=\"_blank\">https://dx.doi.org/10.1007/s00367-010-0203-1</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hachikubo, A.; Khlystov, O.; Krylov, A.; Sakagami, H.; Minami, H.; Nunokawa, Y.; Yamashita, S.; Takahashi, N.; Shoji, H.; Nishio, S.; Kida, M.; Ebinuma, T.; Kalmychkov, G.; Poort, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hachikubo, A. <i>et al.</i>","Englishabstract":"We investigated the molecular composition (methane, ethane, and propane) and stable isotope composition (methane and ethane) of hydrate-bound gas in sediments of Lake Baikal. Hydrate-bearing sediment cores were retrieved from eight gas seep sites, located in the southern and central Baikal basins. Empirical classification of the methane stable isotopes (d<sup>13</sup>C and dD) for all the seep sites indicated the dominant microbial origin of methane via methyl-type fermentation; however, a mixture of thermogenic and microbial gases resulted in relatively high methane d<sup>13</sup>C signatures at two sites where ethane d<sup>13</sup>C indicated a typical thermogenic origin. At one of the sites in the southern Baikal basin, we found gas hydrates of enclathrated microbial ethane in which <sup>13</sup>C and deuterium were both highly depleted (mean d<sup>13</sup>C and dD of –61.6‰ V-PDB and –285.4‰ V-SMOW, respectively). To the best of our knowledge, this is the first report of C<sub>2</sub> d<sup>13</sup>C–dD classification for hydrate-bound gas in either freshwater or marine environments.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Molecular and isotopic characteristics of gas hydrate-bound hydrocarbons in southern and central Lake Baikal","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2010,"MonPub":null,"DateUpdate":"2018-05-17","DateCreate":"2011-10-26","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000277941800014","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s00367-010-0203-1"},"refs":null,"anarec":{"AnaID":208976,"PubliDate":2010,"Pagination":"321-329","XtraPublOfAnaID":null,"ISBN":null,"Volume":"30","Issue":"3-4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42896,"SerRR":"Geo-Marine Letters. 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