2014
DOI: 10.5327/z2317-4889201400030002
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Permian-Triassic maturation and multistage migration of hydrocarbons in the Assistência Formation (Irati Subgroup), Paraná Basin, Brazil: implications for the exploration model

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Cited by 21 publications
(20 citation statements)
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“…The origin of the vents is probably associated with biogenic methane exhumation following hydrocarbon maturation. Several lines of evidence support this interpretation: ■ The vents occur in association with (and above) potential biogenic methane sources (the bituminous-rich black shales), which are the main hydrocarbon sources in the sedimentary succession of the Paraná Basin (Milani & Zalán 1999;Mateus et al 2014); ■ Microbial mats composed of cyanobacterial colonies occur around the cones; ■ Trapped bubbles, veins, vesicles and tubes preserved in the chert of the inner mound walls could have served as conduits for degassing, and these were later filled by microcrystalline silica and pyrite during early diagenesis; ■ Slightly negative C isotope values in the carbonates can indicate methanogenic activity (Tab. 1).…”
Section: The Origin Of the Seep Structures And The Permian Methane Exmentioning
confidence: 98%
See 1 more Smart Citation
“…The origin of the vents is probably associated with biogenic methane exhumation following hydrocarbon maturation. Several lines of evidence support this interpretation: ■ The vents occur in association with (and above) potential biogenic methane sources (the bituminous-rich black shales), which are the main hydrocarbon sources in the sedimentary succession of the Paraná Basin (Milani & Zalán 1999;Mateus et al 2014); ■ Microbial mats composed of cyanobacterial colonies occur around the cones; ■ Trapped bubbles, veins, vesicles and tubes preserved in the chert of the inner mound walls could have served as conduits for degassing, and these were later filled by microcrystalline silica and pyrite during early diagenesis; ■ Slightly negative C isotope values in the carbonates can indicate methanogenic activity (Tab. 1).…”
Section: The Origin Of the Seep Structures And The Permian Methane Exmentioning
confidence: 98%
“…This orientation coincides with the vast majority of local faults and large-scale deformational structures, as well as the microcrystalline silica veins recorded at the base of the Irati Formation. Several examples of synsedimentary deformational structures such as seismites, faults and hydrothermal vents have been described in the Permian succession of the Paraná Basin, which points to a period of intense intraplate deformation and seismicity (Mateus et al 2014;Riccomini et al 1992;Rostirolla et al 2003;Perinotto et al 2008;Yamamoto et al 2005). …”
Section: The Origin Of the Seep Structures And The Permian Methane Exmentioning
confidence: 99%
“…A maturidade térmica dos folhelhos da Formação Irati é altamente variável (imatura a supermatura) e para maioria dos estudos, os episódios de geração de hidrocarbonetos está relacionada ao magmatismo da Serra Geral (Araújo, 2000;Nomura, 2014;Teixeira, 2014). No entanto, outros estudos sugerem a existência de um sistema de hidrocarbonetos já no Permiano (Mateus et al, 2014;Matos et al, 2017), por combinação de gradiente geotérmico e eventos hidrotermais. Desta forma, a previsão da geração de hidrocarbonetos na citada formação é ainda desafiadora.…”
Section: Evidências De Geração De Ch4 Biogênico Na Formação Iratiunclassified
“…A maturação termal tem sido relacionada a dois fatores: processo normal de maturação, por sobrecarga, nas porções mais espessas da bacia, ou pela influência das intrusões básicas (Zalán et al, 1990(Zalán et al, , 1991Araújo et al, 2000Araújo et al, , 2005. Em trabalho mais recente foram apresentadas evidências de maturação permotriássica das rochas do Membro Assistência, anterior, portanto, à Formação Serra Geral (Mateus et al, 2014).…”
Section: Bacia Do Paranáunclassified
“…Paraná (Mateus et al 2014). Merece ainda referência o único estudo com foco na estratigrafia mecânica, realizado na mesma unidade (Cerri, 2015).…”
Section: Introductionunclassified