Publicação:
Evidence for euphotic zone anoxia during the deposition of Aptian source rocks based on aryl isoprenoids in petroleum, Sergipe-Alagoas Basin, northeastern Brazil

dc.contributor.authorSousa Júnior, Gustavo R.
dc.contributor.authorSantos, AntÔnia L.S.
dc.contributor.authorDe Lima, Sidney G.
dc.contributor.authorLopes, José A.D.
dc.contributor.authorReis, Francisco A.M.
dc.contributor.authorSantos Neto, Eugênio V.
dc.contributor.authorChang, Hung K. [UNESP]
dc.contributor.institutionCollege of Natural Sciences, Federal University of Piauí
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionCidade Universitária-Ilha do Fundão
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:30:47Z
dc.date.available2014-05-27T11:30:47Z
dc.date.issued2013-10-01
dc.description.abstractFour crude oil samples from the Sergipe-Alagoas Basin, northeastern Brazil, were analyzed using full scan gas chromatography-quadrupole mass spectrometry (GC-qMS) for biomarkers, in order to correlate them using aromatic carotenoids thereby enhancing knowledge about the depositional environment of their source rocks. The geochemical parameters derived from saturated fractions of the oils show evidence of little or no biodegradation and similar thermal maturation (Ts/(Ts+Tm) for terpanes, C29 αββ/(αββ+ααα), C27, and C29 20S/(20S+20R) for steranes). Low pristane/phytane ratios and the abundance of gammacerane and β-carotane are indicative of an anoxic and saline depositional environment for the source rocks. Moreover, we identified a large range of diagenetic and catagenetic products of the aromatic carotenoid isorenieratene, including C40, C33, and C32 diaryl isoprenoids and aryl isoprenoid derivatives with short side chains and/or additional rings. These results indicate anoxia in the photic zone during the deposition of the source rocks. © 2013 The Authors.en
dc.description.affiliationOrganic Geochemistry Laboratory Chemistry Department College of Natural Sciences, Federal University of Piauí, Campus Minister PetrÔnio Portella, Teresina, PI 64049-550
dc.description.affiliationChemistry Institute University of Campinas, POB 6154, Campinas, SP 13083-970
dc.description.affiliationPetrobrás/Cenpes/PDGEO Cidade Universitária-Ilha do Fundão, Av. Horácio Macedo 950, Rio de Janeiro, RJ 21941-915
dc.description.affiliationUNESP-IGCE-DGA, Av. 24A, 1515, Rio Claro, SP 13506-900
dc.description.affiliationUnespUNESP-IGCE-DGA, Av. 24A, 1515, Rio Claro, SP 13506-900
dc.format.extent94-104
dc.identifierhttp://dx.doi.org/10.1016/j.orggeochem.2013.07.009
dc.identifier.citationOrganic Geochemistry, v. 63, p. 94-104.
dc.identifier.doi10.1016/j.orggeochem.2013.07.009
dc.identifier.issn0146-6380
dc.identifier.lattes1989662459244838
dc.identifier.scopus2-s2.0-84883677625
dc.identifier.urihttp://hdl.handle.net/11449/76732
dc.identifier.wosWOS:000325470100011
dc.language.isoeng
dc.relation.ispartofOrganic Geochemistry
dc.relation.ispartofjcr2.810
dc.relation.ispartofsjr1,287
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectDepositional environment
dc.subjectEuphotic zone
dc.subjectGas chromatography-quadrupole mass spectrometry
dc.subjectGeochemical parameters
dc.subjectNortheastern Brazil
dc.subjectShort side chains
dc.subjectSource rocks
dc.subjectThermal maturation
dc.subjectAromatic compounds
dc.subjectBiodegradation
dc.subjectBiomarkers
dc.subjectGas chromatography
dc.subjectLipids
dc.subjectMass spectrometry
dc.subjectPetroleum industry
dc.subjectPigments
dc.subjectRocks
dc.subjectDeposition
dc.subjectanoxic conditions
dc.subjectAptian
dc.subjectbiodegradation
dc.subjectbiomarker
dc.subjectcarotenoid
dc.subjectcrude oil
dc.subjecteuphotic zone
dc.subjectgas chromatography
dc.subjectisoprenoid
dc.subjectmass spectrometry
dc.subjectsource rock
dc.subjectAtlantic Ocean
dc.subjectBrazil
dc.subjectSergipe-Alagoas Basin
dc.titleEvidence for euphotic zone anoxia during the deposition of Aptian source rocks based on aryl isoprenoids in petroleum, Sergipe-Alagoas Basin, northeastern Brazilen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dspace.entity.typePublication
unesp.author.lattes1989662459244838[7]
unesp.author.orcid0000-0002-9070-3775[1]
unesp.author.orcid0000-0003-3406-6166[5]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
unesp.departmentGeologia Aplicada - IGCEpt

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