{"refrec":{"BRefID":208932,"RR":"<b>Krylov, A. A. ; Khlystov, O. M.; Hachikubo, A.; Minami, H.; Nunokawa, Y.; Shoji, H.; Zemskaya, T. I. ; Naudts, L.; Pogodaeva, T. V. ; Kida, M.; Kalmychkov, G. V. ; Poort, J.</b> (2010). Isotopic composition of dissolved inorganic carbon in subsurface sediments of gas hydrate-bearing mud volcanoes, Lake Baikal: implications for methane and carbonate origin. <i>Geo-Mar. Lett. 30(3-4)</i>: 427-437. <a href=\"http://dx.doi.org/10.1007/s00367-010-0190-2\" target=\"_blank\">dx.doi.org/10.1007/s00367-010-0190-2</a>","BEntID":200920,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Geo-Mar. Lett. 30(3-4)</i>: 427-437. <a href=\"https://dx.doi.org/10.1007/s00367-010-0190-2\" target=\"_blank\">https://dx.doi.org/10.1007/s00367-010-0190-2</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Krylov, A. A. ; Khlystov, O. M.; Hachikubo, A.; Minami, H.; Nunokawa, Y.; Shoji, H.; Zemskaya, T. I. ; Naudts, L.; Pogodaeva, T. V. ; Kida, M.; Kalmychkov, G. V. ; Poort, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Krylov, A. A.  <i>et al.</i>","Englishabstract":"We report on the isotopic composition of dissolved inorganic carbon (DIC) in pore-water samples recovered by gravity coring from near-bottom sediments at gas hydrate-bearing mud volcanoes/gas flares (Malenky, Peschanka, Peschanka 2, Goloustnoe, and Irkutsk) in the Southern Basin of Lake Baikal. The d<sup>13</sup>C values of DIC become heavier with increasing subbottom depth, and vary between -9.5 and +21.4‰ PDB. Enrichment of DIC in <sup>13</sup>C indicates active methane generation in anaerobic environments near the lake bottom. These data confirm our previous assumption that crystallization of carbonates (siderites) in subsurface sediments is a result of methane generation. Types of methanogenesis (microbial methyl-type fermentation versus CO<sub>2</sub>-reduction) were revealed by determining the offset of d<sup>13</sup>C between dissolved CH<sub>4</sub> and CO<sub>2</sub>, and also by using d<sup>13</sup>C and dD values of dissolved methane present in the pore waters. Results show that both mechanisms are most likely responsible for methane generation at the investigated locations.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Isotopic composition of dissolved inorganic carbon in subsurface sediments of gas hydrate-bearing mud volcanoes, Lake Baikal: implications for methane and carbonate origin","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":"2012-02-16","DateCreate":"2011-10-25","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000277941800024","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s00367-010-0190-2"},"refs":null,"anarec":{"AnaID":208932,"PubliDate":2010,"Pagination":"427-437","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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