{"refrec":{"BRefID":353059,"RR":"<b>Blouet, J.-P.; Imbert, P.; Ho, S.; Wetzel, A.; Foubert, A.</b> (2021). What makes seep carbonates ignore self-sealing and grow vertically: the role of burrowing decapod crustaceans. <i>Solid Earth 12(10)</i>: 2439-2466. <a href=\"https://dx.doi.org/10.5194/se-12-2439-2021\" target=\"_blank\">https://dx.doi.org/10.5194/se-12-2439-2021</a>","BEntID":350768,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Solid Earth 12(10)</i>: 2439-2466. <a href=\"https://dx.doi.org/10.5194/se-12-2439-2021\" target=\"_blank\">https://dx.doi.org/10.5194/se-12-2439-2021</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Blouet, J.-P.; Imbert, P.; Ho, S.; Wetzel, A.; Foubert, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Blouet, J.-P. <i>et al.</i>","Englishabstract":"The mechanisms that govern the vertical growth of seep carbonates were deciphered by studying the sedimentary architecture of a 15 m thick, 8 m wide column of limestone encased in deep-water marl in the middle Callovian interval of the Terres Noires Formation in the SE France Basin. The limestone body, also called “pseudobioherm”, records intense bioturbation, with predominant traces of the <i>Thalassinoides/Spongeliomorpha</i> suite, excavated by decapod crustaceans. Bioturbation was organized in four tiers. The uppermost tier, tier&nbsp;1, corresponds to shallow homogenization of rather soft sediment. Tier&nbsp;2 corresponds to pervasive burrows dominated by large <i>Thalassinoides</i> that were later passively filled by pellets. Both homogenized micrite and burrow-filling pellets are depleted in <span class=\"inline-formula\"><sup>13</sup></span>Cin the range from <span class=\"inline-formula\">−5</span> ‰ to <span class=\"inline-formula\">−10</span> ‰. Tier&nbsp;3 is characterized by small <i>Thalassinoides</i> that have walls locally bored by <i>Trypanites</i>; the latter represent tier&nbsp;4. The diagenetic cements filling the tier-3 <i>Thalassinoides</i> are arranged in two phases. The first cement generation constitutes a continuous rim that coats the burrow wall and has consistent <span class=\"inline-formula\"><i>δ</i><sup>13</sup></span>C values of approximately <span class=\"inline-formula\">−8</span> ‰ to <span class=\"inline-formula\">−12</span> ‰, indicative of bicarbonate originating from the anaerobic oxidation of methane. In contrast, the second cement generation is dominated by saddle dolomite precipitated at temperatures <span class=\"inline-formula\">&gt;80</span> <span class=\"inline-formula\"><sup>∘</sup></span>C, at a time when the pseudobioherm was deeply buried. The fact that the tubes remained open until deep burial means that vertical fluid communication was possible over the whole vertical extent of the pseudobioherm up to the seafloor during its active development. Therefore, vertical growth was fostered by this open burrow network, providing a high density of localized conduits through the zone of carbonate precipitation, in particular across the sulfate–methane transition zone. Burrows prevented self-sealing from blocking upward methane migration and laterally deflecting fluid flow. One key aspect is the geometric complexity of the burrows with numerous subhorizontal segments that could trap sediment shed from above and, hence, prevent their passive fill.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"What makes seep carbonates ignore self-sealing and grow vertically: the role of burrowing decapod crustaceans","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":2021,"MonPub":null,"DateUpdate":"2022-06-28","DateCreate":"2022-06-23","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000712041400001","VABBcode":null,"OpenAcc":1,"DOI":"10.5194/se-12-2439-2021"},"refs":null,"anarec":{"AnaID":353059,"PubliDate":2021,"Pagination":"2439-2466","XtraPublOfAnaID":null,"ISBN":null,"Volume":"12","Issue":"10","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":278642,"SerRR":"Solid Earth. 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