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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleCarboxylic acids of marine evaporitic oils from Sergipe-Alagoas Basin, Brazilpt_BR
dc.contributor.authorRodrigues, DCpt_BR
dc.contributor.authorKoike, Lpt_BR
dc.contributor.authorReis, FDMpt_BR
dc.contributor.authorAlves, HPpt_BR
dc.contributor.authorChang, HKpt_BR
dc.contributor.authorTrindade, LApt_BR
dc.contributor.authorMarsaioli, AJpt_BR
unicamp.authorUNICAMP, Inst Quim, BR-13081970 Campinas, SP, Brazil Petrobras E&P SEAL, BR-49075020 Aracaju, SE, Brazil UNESP, IGCE, DGA, BR-13506900 Rio Claro, SP, Brazil Cenpes, Petrobras, BR-21949900 Rio De Janeiro, Brazilpt_BR
dc.subjectSergipe-Alagoas Basinpt_BR
dc.subjectBrazilpt_BR
dc.subjectCarmopolis oil fieldpt_BR
dc.subjectmarine evaporitic petroleumpt_BR
dc.subjectacidic biomakerspt_BR
dc.subjectsteroid-alkanoic acidspt_BR
dc.subjectC-25 regular isoprenoid acidpt_BR
dc.subject.wosCrude Oilspt_BR
dc.subject.wos3-beta-alkyl Steranespt_BR
dc.subject.wosAcyclic Isoprenoidspt_BR
dc.subject.wosMaracaibo Basinpt_BR
dc.subject.wosCampos Basinpt_BR
dc.subject.wosIndicatorspt_BR
dc.subject.wosEnvironmentspt_BR
dc.subject.wosSedimentspt_BR
dc.subject.wosMigrationpt_BR
dc.subject.wosSeriespt_BR
dc.description.abstractA. suite of 10 different marine evaporitic oil samples from Sergipe-Alagoas Basin, Brazil was studied for its biomarker content, in particular its acidic constituents. The oils showed different molecular distributions and relative abundances of n-alkanoic, isoprenoid and hopanoic acids. The observed differences were assigned to the incorporation of immature organic matter in the oils and fractionation along the migration pathway. The diagenetic precursor functionality (alcohol/ether or acid) was proposed based on the comparison of the relative abundances of the neutral and acidic biomarkers (hopanoids, isoprenoids, alkyl-steranes, monoaromatic alkyl-steroids). In the acidic fraction, 3 series of steroid-alkanoic acids and monoaromatic steroid-alkanoic acids (steroid-methanoic, ethanoic and propanoic acids and monoaromatic steroid-methanoic, ethanoic and propanoic acids) were detected, while in the neutral fraction only 2 series of each corresponding class could be observed (methyl and ethyl-steranes and monoaromatic methyl and ethyl-steroids). These carbon shifts suggest that decarboxylation is an important process in the formation of the alkyrsteranes and monoaromatic alkyl-steroids, and we infer that carboxylic acids are the diagenetic precursors of these classes of compounds. When alcohol or ether are the diagenetic precursors (isoprenoids and hopanoids), no significant differences in the molecular distributions between neutral and acidic fractions were observed. (C) 2000 Elsevier Science Ltd. All rights reserved.pt
dc.relation.ispartofOrganic Geochemistrypt_BR
dc.relation.ispartofabbreviationOrg. Geochem.pt_BR
dc.publisher.cityOxfordpt_BR
dc.publisher.countryInglaterrapt_BR
dc.publisherPergamon-elsevier Science Ltdpt_BR
dc.date.issued2000pt_BR
dc.identifier.citationOrganic Geochemistry. Pergamon-elsevier Science Ltd, v. 31, n. 11, n. 1209, n. 1222, 2000.pt_BR
dc.language.isoenpt_BR
dc.description.volume31pt_BR
dc.description.issuenumber11pt_BR
dc.description.initialpage1209pt_BR
dc.description.lastpage1222pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policypt_BR
dc.sourceWeb of Sciencept_BR
unicamp.cruespUNESPpt_BR
dc.identifier.issn0146-6380pt_BR
dc.identifier.wosidWOS:000165656900012pt_BR
dc.identifier.doi10.1016/S0146-6380(00)00110-8pt_BR
dc.date.available2014-12-02T16:28:46Z
dc.date.available2015-11-26T16:37:28Z-
dc.date.accessioned2014-12-02T16:28:46Z
dc.date.accessioned2015-11-26T16:37:28Z-
dc.description.provenanceMade available in DSpace on 2014-12-02T16:28:46Z (GMT). No. of bitstreams: 1 WOS000165656900012.pdf: 471659 bytes, checksum: 3e1ed342ee83446305480e8655fdb65f (MD5) Previous issue date: 2000en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:37:28Z (GMT). No. of bitstreams: 2 WOS000165656900012.pdf: 471659 bytes, checksum: 3e1ed342ee83446305480e8655fdb65f (MD5) WOS000165656900012.pdf.txt: 47844 bytes, checksum: 0de7650f2eb866672ab4d3fb9d18f5bb (MD5) Previous issue date: 2000en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63165pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/63165
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63165-
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