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The paleoenvironmental and thermal histories of the Permian Irati formation shale in the paraná basin, Brazil: An integrated approach based on mineralogical and organic imprints

2023-05Journal article Open access
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dc.contributor.authorRocha, Rocha, H.V.
dc.contributor.authorSant'Anna, L.G.
dc.contributor.authorRodrigues, Cristina F.A.
dc.contributor.authorMendes, Márcia
dc.contributor.authorPereira, Zélia
dc.contributor.authorLopes, Gilda
dc.contributor.authorFernandes, Paulo
dc.contributor.authorPereira, Egberto
dc.contributor.authorTassinari, Colombo C. G.
dc.contributor.authorSousa, M.J. Lemos de
dc.date.accessioned2023-06-02T15:06:15Z
dc.date.embargo2027-12
dc.date.issued2023-05
dc.date.updated2023-06-02T11:19:37Z
dc.description.abstractABSTRACT: Mineralogical assemblages and organofacies are important sources of information to recover the paleoenvironmental and thermal histories of shale deposits. In this study, a detailed qualitative and quantitative characterization of the Permian Irati Formation (Assistência Member) shale is based on mineralogical (XRD and SEM-EDS) and organic components (TOC, Rock-Eval pyrolysis, organofacies, TAI, fluorescence and vitrinite reflectance measurements) and provides integrated data about sediment provenance, depositional environment, diagenesis, and thermal history, while supporting interpretations on the Paraná Basin (PB), Brazil, paleogeography and its correlation to the southwest Gondwana. The results revealed a prevailing type I/II kerogen, with type III kerogen being also present but mainly confined along the paleoshoreline of the PB. The dominance of fluorescent amorphous organic matter (AOM) combined with framboidal pyrite suggests microbial activity in an anoxic-dysoxic neritic-marine paleoenvironment. Additionally, common to abundant well-preserved phytoclasts, as well as the occurrence of Botryococcus braunii, indicates freshwater influx in a brackish marine depositional setting. Immature to early-oil window thermal maturities prevail across the PB, according to the organic maturation indicators. The combined analysis between the organic matter evolution with clay mineralogy, such as the occurrence of interstratified clays (e.g., I/S) and its positive correlation with depth suggest that burial diagenesis reached the transition to early catagenesis on the north, southeast, and south of the basin, attributing a shale oil potential for the Irati Formation on a regional scale. Local scale imprints of the Early Cretaceous Paraná-Etendeka Large Igneous Province (LIP), and its thermal effect in the Irati Formation shale components, are recorded as clay authigenesis (e.g., smectite webby texture and clay coating development), crystallization of minerals by low to high-grade of thermal alteration (e.g., corrensite, talc, lizardite and diopside), and by local scale gas-window maturities. Such thermal alteration, identified in the proximity to intruded sills and dykes, led to a heterogeneous organic maturation pattern with implications on shale gas and shale oil potential of the Irati Formation shale, demonstrating that these subjects in the Paraná Basin should be assessed locally.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRocha, Haline V... [et.al.] - The paleoenvironmental and thermal histories of the Permian Irati formation shale in the paraná basin, Brazil: An integrated approach based on mineralogical and organic imprints. In: Marine and Petroleum Geology, 2023, vol. 154, article nº 10328pt_PT
dc.identifier.doi10.1016/j.marpetgeo.2023.106328pt_PT
dc.identifier.issn0264-8172
dc.identifier.slugcv-prod-3278063
dc.identifier.urihttp://hdl.handle.net/10400.9/4057
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.marpetgeo.2023.106328pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAuthigenesispt_PT
dc.subjectClay coatingpt_PT
dc.subjectIntracratonic basinpt_PT
dc.subjectOrganofaciespt_PT
dc.subjectMarine shalept_PT
dc.subjectSerra geral magmatismpt_PT
dc.subjectShale oilpt_PT
dc.subjectShale gaspt_PT
dc.subjectThermal maturitypt_PT
dc.titleThe paleoenvironmental and thermal histories of the Permian Irati formation shale in the paraná basin, Brazil: An integrated approach based on mineralogical and organic imprintspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleMarine and Petroleum Geologypt_PT
oaire.citation.volume154pt_PT
person.familyNameSilva Mendes
person.familyNamePereira
person.familyNameLopes
person.familyNameFernandes
person.givenNameMárcia Cristina
person.givenNameZélia
person.givenNameGilda
person.givenNamePaulo
person.identifier422469
person.identifier.ciencia-idE71E-1CB5-D774
person.identifier.ciencia-id6C1B-ED1C-8F5D
person.identifier.ciencia-id6115-5FB8-F2D6
person.identifier.ciencia-id051D-A133-65D9
person.identifier.orcid0000-0003-2290-891X
person.identifier.orcid0000-0003-3056-6219
person.identifier.orcid0000-0002-6866-5127
person.identifier.orcid0000-0003-4888-0230
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id57197129025
rcaap.cv.cienciaid6C1B-ED1C-8F5D | Zélia Pereira
rcaap.rightsembargoedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication62179ed8-3ffe-4060-8b9c-e29e4f3e0d27
relation.isAuthorOfPublication5d2bf797-f915-4f53-ae53-166dedd0845a
relation.isAuthorOfPublicationc8db1b88-6ddc-43bb-b428-2c63d4046300
relation.isAuthorOfPublicationb42caa3f-b216-443e-921f-a05b10543663
relation.isAuthorOfPublication.latestForDiscovery62179ed8-3ffe-4060-8b9c-e29e4f3e0d27

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