Paleotemperaturas e paleofluidos da Formação Irati na borda leste da Bacia do Paraná: implicações para a geração e migração de hidrocarbonetos

Oliveira, Alexandra Fernandes

doi:10.11606/d.44.2012.tde-07032013-141844

Cited by 3 publications

(6 citation statements)

References 12 publications

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“…The meter-scale cycles are considered excellent proxies for identifying small-scale fluctuations in the water level (Kerans and Tinker, 1997) and are here interpreted as a product of high-frequency oscillations in the epeiric sea level. As discussed, the association of the facies succession suggests deposition in anoxic waters under reducing bottom conditions, as indicated by the presence of eodiagenetic arsenopyrite concretions and the high content of organic matter preserved in the black shales (Oliveira, 2012). The incidence of massive claystones indicates deposition of muds and silts by suspension fallout in distal environments, far away from the reworking of day-to-day (background) processes by fair-weather and storm-wave orbitals.…”

Section: Depositional Cycle Patternsmentioning

confidence: 93%

Permian endemic bivalves of the “Irati anoxic event”, Paraná Basin, Brazil: Taphonomical, paleogeographical and evolutionary implications

Matos

Warren

Varejão

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Anoxic to dysoxic conditions must have existed in the Paraná Basin during the deposition of the Permian oil-bearing shales of the Irati Formation, reflecting the marine isolation of the basin from the Panthalassic Ocean. In this environment, benthic invertebrates are extremely rare, in contrast to the overlying Serra Alta and Teresina formations, which were deposited in dysoxic/oxic waters, respectively. Hence, the abundant shallow-burrowing, endemic bivalves recorded in the shales of the basal portion of the Irati Formation are one of the most distinctive features of this stratigraphic interval. Their preservation in offshore deposits is, however, a product of storm flows in shallow waters that swept the shells to distal settings. Subsequently, these were sorted by long-lasting shelf currents that produced dense (2-5 shells/20 cm 2) pavements in which shells in a hydrodynamically stable posture (convex-up) predominate, forming thin, complex shell concentrations despite their simple internal stratigraphy. The new data presented here have important paleoecologic, paleogeographic and evolutionary implications and indicate that (a) during the deposition of the oil-rich shales of the Irati Formation, numerous benthic bivalves thrived in the contemporary shallow-water bottoms of the Paraná Basin; (b) the mono-to paucispecific nature of the studied shell-rich pavements is, in part, due to hydrologic shell transport; and (c) restricted connections to open ocean waters (Panthalassa) existed during Irati times. Therefore, the origin of the endemic Passa Dois molluscan fauna occurred somewhere between the interval represented by the underlying Palermo Formation and the basal portion of the Irati Formation. Finally, these endemic bivalves appeared at least~10 million years earlier than previously thought.

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Section: Depositional Cycle Patternsmentioning

confidence: 93%

Permian endemic bivalves of the “Irati anoxic event”, Paraná Basin, Brazil: Taphonomical, paleogeographical and evolutionary implications

Matos

Warren

Varejão

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Famílias de fraturas NE-SW e NW-SE são reconhecidas na sucessão permotriássica da bacia, bem como veios de calcita e quartzo de mesmas direções, os quais têm sido relacionados à circulação de fluidos resultantes do magmatismo da Formação Serra Geral (Oliveira, 2012;Nomura et al, 2014;Teixeira et al, 2016). No entanto, a presença de geiseritos (Yamamoto et al, 2005) e campo de exsudação de metano, com direções preferenciais NE-SW (Warren et al, 2017) indicam a circulação de fluidos na bacia ainda durante o Permiano, conforme proposto em estudo recente (Mateus et al, 2014).…”

Section: Trabalhos Anterioresunclassified

“…Estruturas dômicas decimétricas silicificadas interpretadas como geiseritos foram descritas nas regiões de Anhembi (Yamamoto et al, 2005) e Saltinho (Mateus et al, 2014). No primeiro caso ocorrem em meio a siltitos com intercalações de lâminas de rochas carbonáticas da Formação Teresina, topo do Grupo Passa Dois hidrocarbonetos de dois tipos: um condensado e um óleo volátil (Oliveira, 2012). Os veios calcíticos foram relacionados ao magmatismo da Formação Serra Geral, do…”

Section: Estruturas De Exalação De Fluidosunclassified

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Caracterização bidimensional de fraturas naturais de tração em bacias sedimentares: Algumas implicações para o fraturamento hidráulico estimulado

Moura¹

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Embora não seja uma tarefa fácil, tento aqui agradecer a todos que contribuíram de alguma forma com este trabalho, correndo risco de cometer alguma injustiça. Ao Instituto de Geociências, minha segunda casa, e também ao seu corpo docente, agradeço pela formação acadêmica. Ao administrativo, pela sempre cortês assistência. Meu agradecimento se encaminha a todos aqueles que, de alguma forma, trabalham para manter as suas engrenagens ativas. Ao Prof. Dr. Claudio Riccomini, pela paciência e pelos ensinamentos. Foi recompensador ser orientada por alguém que sempre teve a minha admiração e respeito. Ao Laboratório de Caracterização de Rochas de Sistemas Petrolíferos-IEE-USP, especialmente à Profa. Dr. Lucy Gomes Sant'Anna, por todo o tempo dispensado, pelas orientações e análises. À Erika Malo, por todo o auxílio. Ao Eng. Luis José Marcelino Júnior e aos técnicos do Grupo Emal, ao Geól. Cleverson Cabral e aos técnicos da Império Minerações, à Érica da Pedreira Terconi, ao Eng. Marcelo Lopes Dall'Antônia do Calcário Amaral Machado e à Fazenda Jacobina, todos esses que nos consentiram acesso e cordialmente nos acompanharam durante os trabalhos de campo. À Camille, pela revisão textual em tão breve tempo. Aos meus colegas da Coordenação Municipal de Defesa Civil-COMDEC-, principalmente ao Vitor Nishimoto, pelo apoio nessa caminhada. Não poderia deixar de agradecer à Amanda, à Daiane, à Natália, à Pâmela e à Lívia-vocês são incríveis! Vocês me apoiaram e não me deixaram desistir. À Silvana pelo auxílio com os programas e análises de difratometria de raio x. À Camila, agradeço a nossa amizade, a paciência em ouvir minhas reclamações, por todo apoio e incentivo. Pelo trabalho de campo e fotos, mesmo debaixo de um calor de quase 40ºC! Pelos mapas e livros. Enfim, são muitas coisas a agradecer. vi À Alexandra, pela amizade de longa data. Agradeço os textos sobre a Formação Irati e a revisão. Aos meus pais, que se dedicaram para que eu pudesse alcançar os meus sonhos e ser quem eu desejasse ser. Amo vocês. Ao meu irmãozinho coruja, por acreditar em mim. Ao Felipe, por entender os momentos conturbados, as ausências e as loucuras. Aos membros da Comissão Julgadora pelas valiosas sugestões apresentadas durante a sessão de defesa da tese.

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“…Geochemical data indicate that the organic-rich shales in the Assistência Formation (Hachiro 1996) are the major potential oil-prone rocks in the Paraná Basin (Zalán et al 1990). Total organic carbon (TOC) of the Irati shale in the State of São Paulo and Paraná ranges from 0.43 and 17.41% (Oliveira 2012), making the unit a potential oiland gas-source. Estimated homogenization temperatures (Th) between 100° and 150° C, reaching values up to 300°C, suggest that the Irati shales reached the ideal timing and temperatures to the oil and gas generation (Oliveira 2012, Mateus et al 2014.…”

Section: The Hydrocarbon (Methane) Sourcementioning

confidence: 99%

Geocronologia e geoquímica isotópica do Grupo Passa Dois (Permiano) na borda leste da Bacia do Paraná (Estados de Santa Catarina e São Paulo, Brasil)

Alessandretti¹

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The main goals of this thesis are the evaluation of the sedimentary provenance and the birth and growth of carbonate concretions from the Permian Passa Dois Group along the eastern border of the Paraná Basin. To achieve such objectives, detailed columnar sections from the distinct formations of the Passa Dois Group were measured in the Lages Dome, Rio do Rastro and Porangaba areas. The U-Pb and Lu-Hf isotopic signatures of detrital zircons coupled with paleocurrent data from the Serra Alta, Teresina and Rio do Rasto formations, allowed the elaboration of a paleogeographic model for the Paraná Basin and adjacent areas of southwestern Gondwana during the Permian. In this way, the Gondwanides Orogen, which was active during the Permo-Carboniferous, acted as an important source area providing immature detritus to the sediment-routing systems. The Brasiliano/Pan-African mobile belts such as the Ribeira, Dom Feliciano, Damara and Namaqua-Natal, which surrounded the eastern edge of Paraná Basin during Permian times, acted as important sediment source areas. The sedimentary recycling of the Cambrian and Devonian quartzites of the Ventania Fold Belt and the Siluro-Devonian sandstones of the Sierra Grande Formation of the North Patagonian Massif was also a striking process responsible for the sedimentary supply of the Paraná Basin during the Permian. Another significant source area was the Grenvillian igneous rocks of mafic to intermediate compositions from the Namaqua-Natal Belt in South Africa and Namibia. In this way, the sediments that reached the Paraná Basin during the Permian have been subjected to both, short and long distance travels. The stable isotope analyses of micritic calcite cements from carbonate concretions and clastic dikes of the Serra Alta Formation revealed an atypical methane seep system in the Permian Passa Dois Group of the basin. This seep was developed within an epicontinental sea and was fueled by the organic-rich shales of the Irati Formation. The intraplate seismic activity, probably related to the compressional stress along the southern margin of Gondwana, resulted in extensive faulting of Precambrian basement and Permian strata. This syn-sedimentary seismicity induced sediment liquefaction and upward forced injection of fluidized sediments within the Serra Alta sediments. After faulting and clastic dikes emplacement, these structures acted as the plumbing system for methane migration from the Irati organic-rich shales to the Serra Alta Formation. The subtle 13 C-depleted carbonate matrix from the Serra Alta x concretions suggests that the formation was mediated by microbially-induced anaerobic oxidation of methane coupled with sulfate reduction at the sulfate-methane transition zone. Furthermore, microbially-induced sedimentary structures are recorded in limestones between the concretion-bearing intervals. Unusually large pyrite framboid clusters (~1.5 mm) along the concretions rims indicate establishment of strongly reducing conditions, most likely associated to the expansion of an oxygen m...

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Paleotemperaturas e paleofluidos da Formação Irati na borda leste da Bacia do Paraná: implicações para a geração e migração de hidrocarbonetos

Cited by 3 publications

References 12 publications

Permian endemic bivalves of the “Irati anoxic event”, Paraná Basin, Brazil: Taphonomical, paleogeographical and evolutionary implications

Permian endemic bivalves of the “Irati anoxic event”, Paraná Basin, Brazil: Taphonomical, paleogeographical and evolutionary implications

Caracterização bidimensional de fraturas naturais de tração em bacias sedimentares: Algumas implicações para o fraturamento hidráulico estimulado

Geocronologia e geoquímica isotópica do Grupo Passa Dois (Permiano) na borda leste da Bacia do Paraná (Estados de Santa Catarina e São Paulo, Brasil)

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