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dc.contributor.author
Pons, María Josefina
dc.contributor.author
Rainoldi, Ana Laura
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Franchini, Marta Beatriz
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Giusiano, Adolfo Eugenio
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Cesaretti, Nora Noemi
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Beaufort, D.
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Patrier, P.
dc.contributor.author
Impiccini, Agnes
dc.date.available
2018-04-05T19:39:22Z
dc.date.issued
2015-03
dc.identifier.citation
Pons, María Josefina; Rainoldi, Ana Laura; Franchini, Marta Beatriz; Giusiano, Adolfo Eugenio; Cesaretti, Nora Noemi; et al.; 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; 3-2015; 525-554
dc.identifier.issn
0149-1423
dc.identifier.uri
http://hdl.handle.net/11336/40971
dc.description.abstract
The 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. Paleo-migration 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) multi-stage calcite and pyrite in the coarse-grained sandstones and conglomerates.The δ34SCDT 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 PCO2 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 colour, indicating that hydrocarbon composition changed with time. The intermediate δ13CPDB (−8.11? to −8.52?) and δ18OPDB (−9.76 to −9.87?) 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 rocks in the basin and improves understanding of the diagenetic history of the Portezuelo Formation.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Association of Petroleum Geologists
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Hydrocarbons
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Authigenic
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Cements
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Portezuelo
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Formation
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Dorsal
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Huincul
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Faults
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Neuquén
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Mineralogical signature of hydrocarbon circulation in Cretaceous red beds of the Barda González area, Neuquén Basin, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-28T18:06:20Z
dc.journal.volume
99
dc.journal.number
3
dc.journal.pagination
525-554
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Tulsa
dc.description.fil
Fil: Pons, María Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo; Argentina
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Fil: Rainoldi, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Negro; Argentina
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Fil: Franchini, Marta Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue; Argentina. Universidad Nacional de Río Negro; Argentina
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Fil: Giusiano, Adolfo Eugenio. Dirección Provincial de Hidrocarburos y Energía de la Provincia del Neuquén; Argentina
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Fil: Cesaretti, Nora Noemi. Universidad Nacional del Sur; Argentina
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Fil: Beaufort, D.. Université de Poitiers; Francia
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Fil: Patrier, P.. Université de Poitiers; Francia
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Fil: Impiccini, Agnes. Universidad Nacional del Comahue; Argentina. Universidad Nacional de Río Negro; Argentina
dc.journal.title
AAPG Bulletin
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://archives.datapages.com/data/bulletns/2015/03mar/BLTN13170/BLTN13170.html?doi=10.1306%2F08131413170
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1306/08131413170
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