{"refrec":{"BRefID":296029,"RR":"<b>Préat, A.; Prian, J.-P.; Thieblemont, D.; Obame, R.M.; Delpomdor, F.</b> (2011). Stable isotopes of oxygen and carbon compositions in the Neoproterozoic of South Gabon (Schisto-Calcaire Subgroup, Nyanga Basin): are cap carbonates and lithoherms recording a particular destabilization event after the Marinoan glaciation? <i>J. Afr. Earth Sci. 60(4)</i>: 273-287. <a href=\"https://dx.doi.org/10.1016/j.jafrearsci.2011.03.005\" target=\"_blank\">https://dx.doi.org/10.1016/j.jafrearsci.2011.03.005</a>","BEntID":288118,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":" <i>J. Afr. Earth Sci. 60(4)</i>: 273-287. <a href=\"https://dx.doi.org/10.1016/j.jafrearsci.2011.03.005\" target=\"_blank\">https://dx.doi.org/10.1016/j.jafrearsci.2011.03.005</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Préat, A.; Prian, J.-P.; Thieblemont, D.; Obame, R.M.; Delpomdor, F.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Préat, A. <i>et al.</i>","Englishabstract":"Geologic evidence of tropical sea level glaciation in the Neoproterozoic remains a matter of debate in the Snowball Earth hypothesis. The Niari Tillite Formation and the cap carbonates record the late Neoproterozoic Marinoan glaciation in South Gabon. These cap carbonates are located at the base of the Schisto-Calcaire Subgroup a predominantly carbonate succession that rests with sharp contact on top of the Niari Tillite. Integrating sedimentological and stable isotope data, a consistent sequence of precipitation events is proposed, with strongly negative δ<sup>13</sup>C values pointing to a particular event in the cap carbonates (average δ<sup>13</sup>C value = −3.2‰ V-PDB) and in a further newly defined lithohermal unit (average δ<sup>13</sup>C value = −4.6‰ V-PDB). Subsequent shallow evaporitive platform carbonates display carbon and oxygen isotopic compositions indicative of relatively unaltered seawater values. Strongly negative δ<sup>18</sup>O values in the lithoherms and replacement of aragonite fans by equigranular calcite suggest flushing of meteoric water derived from glacial meltwater.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Stable isotopes of oxygen and carbon compositions in the Neoproterozoic of South Gabon (Schisto-Calcaire Subgroup, Nyanga Basin): are cap carbonates and lithoherms recording a particular destabilization event after the Marinoan glaciation?","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-11 01:32:24.414059","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Schisto-Calcaire Subgroup; Cap carbonates; Lithoherms; Marinoanglaciation; Stable isotopes; Gabon","OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2022-07-12","DateCreate":"2018-05-15","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000291075600006","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.jafrearsci.2011.03.005"},"refs":null,"anarec":{"AnaID":296029,"PubliDate":2011,"Pagination":"273-287","XtraPublOfAnaID":null,"ISBN":null,"Volume":"60","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45914,"SerRR":"Journal of African Earth Sciences. Elsevier: Oxford & Amsterdam.  ISSN 1464-343X; e-ISSN 1879-1956","StandardTitleSer":"Journal of African Earth Sciences","ISSN":"1464-343X","AbbrevSer":"J. Afr. 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