{"refrec":{"BRefID":76136,"RR":"<b>Blamart, D.; Rollion-Bard, C.; Cuif, J.P.; Juillet-Leclerc, A.; Lutringer, A.; van Weering, T.C.E.; Henriet, J.-P.</b> (2005). C and O isotopes in a deep-sea coral (<i>Lophelia pertusa</i>) related to skeletal microstructure, <b><i>in</i></b>: Freiwald, A. <i>et al.</i> (Ed.) <i>Cold-water corals and ecosystems. Erlangen Earth Conference Series,</i> : pp. 1005-1020","BEntID":71781,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: Freiwald, A. <i>et al.</i> <i>Cold-water corals and ecosystems. Erlangen Earth Conference Series,</i> : pp. 1005-1020","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Blamart, D.; Rollion-Bard, C.; Cuif, J.P.; Juillet-Leclerc, A.; Lutringer, A.; van Weering, T.C.E.; Henriet, J.-P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Blamart, D. <i>et al.</i>","Englishabstract":"<i>Lophelia pertusa</i> is a deep-sea scleractinian coral (azooxanthellate) found on the continental margins of the major world oceans. Built of aragonite it can be precisely dated and measured for stable isotope composition (C-O) to reconstruct past oceanic conditions. However, the relation between stable isotope and skeleton microstructures, i.e. centres of calcification and surrounding fibres, is crucial for understanding the isotopic patterns. Values for d<sup>18</sup>0 and d<sup>13</sup>C in <i>Lophelia pertusa</i> were determined at a micrometer scale using an ion microprobe (SIMS – Secondary Ion Mass Spectrometry). In this coral species, centres of calcification are large (50 µm) and arranged in lines. The centres of calcification have a restricted range of variation in d<sup>18</sup>0 (-2.8 ± 0.3 ‰ (V-PDB)), and a larger range in d<sup>13</sup>C (14.3 to 10.9 ‰ (V-PDB)). Surrounding skeletal fibres exhibit large isotopic variation both for C and 0 (up to 12 ‰) and d<sup>13</sup>C and d<sup>18</sup>0 are positively correlated. The C and 0 isotopic composition of the centres of calcification deviate from this linear trend at the lightest d<sup>18</sup>0 values of the surrounding fibres. The fine-scaled variation of d<sup>18</sup>0 is probably the result of two processes: (1) isotopic equilibrium calcification with at least 1 pH unit variation in the calcification fluid and (2) kinetic fractionation. The apparent d<sup>13</sup>C disequilibrium in <i>Lophelia pertusa</i> may be the result of mixing between depleted d<sup>13</sup>C metabolic CO<sub>2</sub> (respiration) and DIC coming directly from seawater. This study underlines the close relationship between microstructure and stable isotopes in corals. This relationship must also be taken into consideration for major elements like Mg and trace elements (U-Sr-Ba) increasing the reliability of the geochemical tools used in paleoceanography.","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"C and O isotopes in a deep-sea coral (<i>Lophelia pertusa</i>) related to skeletal microstructure","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":"Deep-sea corals; SIMS stable isotopes; isotopic disequilibrium; Lophelia pertusa","OtherDescriptors":null,"Notes":null,"AnaPub":2005,"MonPub":null,"DateUpdate":"2011-12-12","DateCreate":"2005-09-01","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":76136,"PubliDate":2005,"Pagination":"1005-1020","XtraPublOfAnaID":null,"ISBN":"3-540-24136","Volume":null,"Issue":null,"BRefMon":75235,"BRefMonRR":"<b>Freiwald, A.; Roberts, J.M. (Ed.)</b> (2005). Cold-water corals and ecosystems. <i>Erlangen Earth Conference Series</i>. Springer: Berlin. ISBN 3-540-24136. XXXII, 1243 pp. <a href=\"https://dx.doi.org/10.1007/3-540-27673-4\" target=\"_blank\">https://dx.doi.org/10.1007/3-540-27673-4</a>","BRefXtra":null,"BRefXtraRR":null,"SerBRefID":76035,"SerRR":"<b>Freiwald, A. (Ed.)</b> Erlangen Earth Conference Series. Springer: Berling. ","StandardTitleSer":"Erlangen Earth Conference Series","ISSN":null,"AbbrevSer":null,"StandardTitleMon":"Cold-water corals and ecosystems","StartPage":1005,"Pages":16,"ToPubliDate":null,"BRefBibLvlCode":"MS","SerNotes":null,"AutString":"Freiwald, A.; Roberts, J.M. 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