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dc.contributor.authorPons, María J.-
dc.contributor.authorRainoldi, Ana L.-
dc.contributor.authorFranchini, Marta B.-
dc.contributor.authorGiusiano, Adolfo-
dc.contributor.authorCesaretti, Nora-
dc.contributor.authorBeaufort, Daniel-
dc.contributor.authorPatrier, Patricia-
dc.contributor.authorImpiccini, Agnes-
dc.date.accessioned2020-02-06T15:38:55Z-
dc.date.available2020-02-06T15:38:55Z-
dc.date.issued2015-03-01-
dc.identifier.citationPons, María J., Rainoldi, Ana L., Franchini, Marta B., Giusiano, Adolfo., Cessartti, Nora., Beaufort, Daniel., Patrier Patricia and Impiccini, Agnes (2015). Mineralogical signature of hydrocarbon circulation in Cretaceous red beds of the Barda González area, Neuquén Basin, Argentina. American Association of Petroleum Geologists; AAPG Bulletin; 99 (3); 525-554es_ES
dc.identifier.issn0149-1423es_ES
dc.identifier.urihttps://rid.unrn.edu.ar/jspui/handle/20.500.12049/4153-
dc.description.abstractThe Portezuelo Formation is part of a red bed sequence in the Neuquén Basin assigned to the Neuquén Group (lower Cenomanian–middle Campanian). In outcrops of the Portezuelo Formation in the Barda González region, iron oxide and hydroxide cements are only preserved in the less permeable claystone layers. Paleomigration of hydrocarbons and formation waters along the most permeable layers bleached the rocks due to partial to total dissolution of cements and grains and formation of several authigenic minerals: (1) montmorillonite and pyrite in the medium- to fine-grained sandstones and mudstones, and (2) multistage calcite and pyrite in the coarse-grained sandstones and conglomerates. The δ34SCDT (Canyon Diablo troilite) of −24.4 to −60‰ values in pyrite point to microbial reduction of a sulfate precursor. The oxidation of hydrocarbons and fluctuations in pH and carbon dioxide pressure caused by organic acids resulted in multiple stages of dissolution and precipitation of calcite. Calcite crystals host hydrocarbon-bearing fluid inclusions (± pyrite) with variable fluorescence color, indicating that hydrocarbon composition changed with time. The intermediate δ13CPDB (Peedee belemnite) (−8.11‰ to −8.52‰) and δ18OPDB(−9.76 to −9.83‰) isotope composition of calcites may have resulted from mixtures of 13C-rich CO2 after the dissolution of local calcrete with 13C-poor CO2 from oxidizing hydrocarbons. This contribution provides for the first time key information to predict the distribution of authigenic minerals in reservoir rockin the basin and improves understanding of the diagenetic history of the Portezuelo Formation.es_ES
dc.format.extent525-554es_ES
dc.format.mediumimpresoes_ES
dc.language.isoenes_ES
dc.publisherAmerican Association of Petroleum Geologistses_ES
dc.titleMineralogical signature of hydrocarbon circulation in Cretaceous red beds of the Barda González area, Neuquén Basin, Argentinaes_ES
dc.typeArticuloes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.description.filiationFil: Pons, María J. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología. Río Negro; Argentina.es_ES
dc.description.filiationFil: Pons, María J. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Patagónico de Estudios Metalogenéticos; Argentinaes_ES
dc.description.filiationFil: Pons, María J. Universidad Nacional del Comahue; Argentinaes_ES
dc.description.filiationFil: Rainoldi, Ana L. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Patagónico de Estudios Metalogenéticos; Argentinaes_ES
dc.description.filiationFil: Rainoldi, Ana L. Universidad Nacional del Comahue; Argentinaes_ES
dc.description.filiationFil: Rainoldi, Ana L. Universidad Nacional de Río Negro; Argentinaes_ES
dc.description.filiationFil: Rainoldi, Ana L. Universidad Nacional del Sur. Departamento de Geología; Argentinaes_ES
dc.description.filiationFil: Franchini, Marta B. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Patagónico de Estudios Metalogenéticos; Argentinaes_ES
dc.description.filiationFil: Franchini, Marta B. Universidad Nacional del Comahue; Argentinaes_ES
dc.description.filiationFil: Franchini, Marta B. Universidad Nacional de Río Negro; Argentinaes_ES
dc.description.filiationFil: Giusiano, Adolfo. Dirección Provincial de Hidrocarburos y Energía de la Provincia del Neuquén; Argentinaes_ES
dc.description.filiationFil: Cesaretti, Nora. Universidad Nacional del Sur. Departamento de Geología; Argentinaes_ES
dc.description.filiationFil: Beaufort, Daniel. Université de Poitiers, IC2MP, CNRS-UMR 7285, Hydrasa, Bâtiment B08, Rue Albert Turpin, F-86022 Poitiers Cedex, Francees_ES
dc.description.filiationFil: Patrier, Patricia. Université de Poitiers, IC2MP, CNRS-UMR 7285, Hydrasa, Bâtiment B08, Rue Albert Turpin, F-86022 Poitiers Cedex, Francees_ES
dc.description.filiationFil: Impiccini, Agnes. Universidad Nacional del Comahue. Centro Patagónico de Estudios Metalogenéticos; Argentinaes_ES
dc.description.filiationFil: Impiccini, Agnes. Universidad Nacional de Río Negro; Argentinaes_ES
dc.subject.keywordHydrocarbon Circulationes_ES
dc.subject.keywordBarda González Areaes_ES
dc.subject.keywordNeuquén Basines_ES
dc.subject.keywordArgentinaes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.materiaCiencias Exactas y Naturaleses_ES
dc.subject.materiaCiencias Ambientales y de la Tierraes_ES
dc.origin.lugarDesarrolloCPEM, Departamento de Geología y Petróleo, Facultad de Ingeniería, Universidad Nacional del Comahuees_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro. Argentinaes_ES
dc.origin.lugarDesarrolloUniversité de Poitiers, IC2MP, CNRS-UMR 7285, Hydrasa, Franciaes_ES
dc.origin.lugarDesarrolloUniversidad, Nacional del Sur, Departamento de Geología, Buenos Aires Argentinaes_ES
dc.origin.lugarDesarrolloConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Investigaciones de Paloebiología y Geología, Río Negro, Argentinaes_ES
dc.origin.lugarDesarrolloDirección Provincial de Hidrocarburos y Energía de la Provincia del Neuquén, Argentinaes_ES
dc.relation.journalissue99 (3)es_ES
dc.description.reviewtruees_ES
dc.description.resumenThe Portezuelo Formation is part of a red bed sequence in the Neuquén Basin assigned to the Neuquén Group (lower Cenomanian–middle Campanian). In outcrops of the Portezuelo Formation in the Barda González region, iron oxide and hydroxide cements are only preserved in the less permeable claystone layers. Paleomigration of hydrocarbons and formation waters along the most permeable layers bleached the rocks due to partial to total dissolution of cements and grains and formation of several authigenic minerals: (1) montmorillonite and pyrite in the medium- to fine-grained sandstones and mudstones, and (2) multistage calcite and pyrite in the coarse-grained sandstones and conglomerates. The δ34SCDT (Canyon Diablo troilite) of −24.4 to −60‰ values in pyrite point to microbial reduction of a sulfate precursor. The oxidation of hydrocarbons and fluctuations in pH and carbon dioxide pressure caused by organic acids resulted in multiple stages of dissolution and precipitation of calcite. Calcite crystals host hydrocarbon-bearing fluid inclusions (± pyrite) with variable fluorescence color, indicating that hydrocarbon composition changed with time. The intermediate δ13CPDB (Peedee belemnite) (−8.11‰ to −8.52‰) and δ18OPDB(−9.76 to −9.83‰) isotope composition of calcites may have resulted from mixtures of 13C-rich CO2 after the dissolution of local calcrete with 13C-poor CO2 from oxidizing hydrocarbons. This contribution provides for the first time key information to predict the distribution of authigenic minerals in reservoir rockin the basin and improves understanding of the diagenetic history of the Portezuelo Formation.es_ES
dc.identifier.doi10.1306/08131413170-
dc.relation.journalTitleAAPG Bulletines_ES
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