scholarly journals FACIES ANALYSIS APPLIED TO IRATI FORMATION IN THE NORTHERN AREA OF THE PARANÁ BASIN, GOIÁS STATE – A CONTRIBUTION FOR A DEPOSITIONAL MODEL

2019 ◽  
Vol 4 (1) ◽  
pp. 72-89
Author(s):  
Andressa Azevedo Oishi ◽  
Egberto Pereira ◽  
Lucas Pinto Heckert Bastos ◽  
Daniel Galvão Carnier Fragoso
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
High Energy ◽  
Lower Permian ◽  
Organic Carbon Content ◽  
Facies Association ◽  
Geological Processes ◽  
Irati Formation ◽  
Paraná Basin ◽  
Parana Basin

The Irati Formation (Lower Permian of Paraná Basin) is a lithostratigraphic unit characterized by the rhythmic alternation between carbonates, shales, and marls, interpreted as low energy deposits with eventual storm deposition. Despite many studies that were developed at Irati Formation in the south and southeast part of Brazil, a better comprehension of the geological processes that took place in the northern portion is still necessary. In this sense, we present a detailed sedimentological analysis coupled with organic carbon content for the Permian rocks of Paraná Basin at Goiás State. Based on sedimentological descriptions, six facies association, including low to high energy facies, were described and interpreted as deposits of an inner to outer ramp domains of a homoclinal ramp system. Our data also indicate a relationship between changes in facies association and organic carbon content variation. TítuloANÁLISE DE FACIES SEDIMENTARES APLICADA À FORMAÇÃO IRATI NA ÁREA NORTE DA BACIA DO PARANÁ, GOIÁS - UMA CONTRIBUIÇÃO PARA O MODELO DE DEPOSIÇÃOResumoA Formação Irati (Permiano inferior da Bacia do Paraná, Brasil) é uma unidade litoestratigráfica caracterizada pela alternância rítmica de carbonatos, folhelhos e margas, considerados depósitos de baixa energia intercalados pela deposição eventual de tempestitos. Apesar de terem sido efetuados muitos estudos na Formação Irati, no sul e sudeste do Brasil, ainda é necessária uma melhor compreensão dos processos geológicos que ocorreram na sua porção norte. Por isso, este trabalho apresenta uma análise sedimentológica detalhada associada ao teor de carbono orgânico em rochas do Permiano da Bacia do Paraná, no estado de Goiás. Com base em descrições sedimentológicas, seis associações de fácies, incluindo fácies de baixa a elevada energia, foram consideradas depósitos de rampa interna a externa, de um sistema de rampa homoclinal. Os dados obtidos permitem também analisar a relação entre mudanças na associação de fácies e a variação do conteúdo de carbono orgânico sedimentar. Palavras-chave: Bacia do Paraná. Formação Irati. Análise de fácies sedimentares. Associação de fácies. Sistema deposicional.

scholarly journals Effects of Igneous Intrusion on the Organic Content of Irati Formation, Paraná Basin, in Sapopema (PR)

2020 ◽  
Vol 43 (4) ◽  
Author(s):  
Werlem Holanda ◽  
Anderson Costa dos Santos ◽  
Camila Cardoso Nogueira ◽  
Sérgio Bergamaschi ◽  
René Rodrigues ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Organic Matter Content ◽  
Organic Content ◽  
Insoluble Residue ◽  
Sem Images ◽  
Igneous Intrusion ◽  
Irati Formation ◽  
Paraná Basin ◽  
Parana Basin

The thermal effects of an igneous intrusion on organic-rich sedimentary rocks can be considering an important source of maturation of organic matter. The Permian Irati Formation of Paraná Basin (Brazil) is a carbonatic and organic-rich shale sequence intruded by Jurassic-Cretaceous basic rocks. This study reports possible effects of igneous intrusion on the organic matter content of Irati Formation, in Sapopema region (Paraná State). Total organic carbon (TOC), total sulfur (S) and insoluble residue (IR) data were combined with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The relatively low TOC values recorded in well where Irati Formation is in contact with 60 m of diabase sill (SP-58-PR) are residuals, associated with the depletion of organic carbon, caused by the thermal effect from the overlying intrusive rock. It was responsible to promote the cracking of the organic matter and reduced those values in relation to the original ones, observed in SP-32-PR (without thermal influence). When comparing the TOC peaks of the Assisting Member in both wells, it was observed that there was a decrease between 80.7 and 84% in the SP-58-PR. SEM images reveal that organic matter in Taquaral Member is sub-rounded and regular shape, while the organic matter in Assistência Member presents a characteristic pattern of thermally evolved organic matter.

scholarly journals OIL GENERATION POTENTIAL ASSESSMENT AND PALEOENVIRONMENTAL INTERPRETATION OF IRATI FORMATION (LOWER PERMIAN) IN NORTHWESTERN OF PARANÁ BASIN (BRAZIL)

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Rosane Dos Santos Euzébio ◽  
Darlly Erika Silva dos Reis ◽  
Marco António Ruivo de Castro e Brito ◽  
Sérgio Bergamaschi ◽  
Maria Virgínia Alves Martins Alves Martins ◽  
...  
Keyword(s):  
Lower Permian ◽  
Irati Formation ◽  
Oil Generation ◽  
Paleoenvironmental Interpretation ◽  
Paraná Basin ◽  
Parana Basin

Physical and chemical protection of soil organic carbon in three agricultural soils with different contents of calcium carbonate

Soil Research ◽  
2000 ◽  
Vol 38 (5) ◽  
pp. 1005 ◽  
Author(s):  
A. Clough ◽  
J. O. Skjemstad
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Organic Material ◽  
Agricultural Soils ◽  
Calcareous Soils ◽  
High Energy ◽  
Organic Carbon Content ◽  
Photo Oxidation ◽  
Active Organic Carbon ◽  
Physical And Chemical

The amount of organic carbon physically protected by entrapment within aggregates and through polyvalent cation–organic matter bridging was determined on non-calcareous and calcareous soils. The composition of organic carbon in whole soils and <53 m soil fractions was determined by 13C NMR analysis. High energy photo-oxidation was carried out on <53 m fractions and results from the NMR spectra showed 17–40% of organic carbon was in a condensed aromatic form, most likely charcoal (char). The concept that organic material remaining after photo-oxidation may be physically protected within aggregates was investigated by treating soils with a mild acid prior to photo-oxidation. More organic material was protected in the calcareous than the non-calcareous soils, regardless of whether the calcium occurred naturally or was an amendment. Acid treatment indicated that the presence of exchangeable calcium reduced losses of organic material upon photo-oxidation by about 7% due to calcium bridging. These results have implications for N fertiliser recommendations based upon organic carbon content. Firstly, calcium does not impact upon degradability of organic material to an extent likely to affect N fertiliser recommendations. Secondly, standard assessment techniques overestimate active organic carbon content in soils with high char content.

Biomarkers stratigraphy of Irati Formation (Lower Permian) in the southern portion of Paraná Basin (Brazil)

2018 ◽  
Vol 95 ◽  
pp. 110-138 ◽  
Author(s):  
Darlly E.S. dos Reis ◽  
René Rodrigues ◽  
John M. Moldowan ◽  
Cleveland M. Jones ◽  
Marco Brito ◽  
...  
Keyword(s):  
Lower Permian ◽  
Irati Formation ◽  
Paraná Basin ◽  
Parana Basin

scholarly journals Chromans as Signals of Freshwater Incursions Promoting Salinity Stratification in the Lower Permian Irati Formation, ParanÁ Basin

2019 ◽  
Author(s):  
L.L. Martins ◽  
H.-M. Schulz ◽  
H.J.P. Severiano Ribeiro ◽  
E.S. de Souza ◽  
C.A. do Nascimento ◽  
...  
Keyword(s):  
Lower Permian ◽  
Salinity Stratification ◽  
Irati Formation ◽  
Paraná Basin ◽  
Parana Basin

Organic geochemical signals of freshwater dynamics controlling salinity stratification in organic-rich shales in the Lower Permian Irati Formation (Paraná Basin, Brazil)

2020 ◽  
Vol 140 ◽  
pp. 103958
Author(s):  
Laercio Lopes Martins ◽  
Hans-Martin Schulz ◽  
Hélio Jorge Portugal Severiano Ribeiro ◽  
Caroline Adolphsson do Nascimento ◽  
Eliane Soares de Souza ◽  
...  
Keyword(s):  
Lower Permian ◽  
Salinity Stratification ◽  
Irati Formation ◽  
Paraná Basin ◽  
Parana Basin

scholarly journals CHARACTERIZATION OF THE ASSISTÊNCIA MEMBER, IRATI FORMATION, PARANÁ BASIN, BRAZIL: ORGANIC MATTER AND MINERALOGY / CARACTERIZAÇÃO DO MEMBRO DO ASSISTÊNCIA, FORMAÇÃO IRATI, BACIA DO PARANÁ, BRASIL: MATÉRIA ORGÂNICA E MINERALOGIA

2016 ◽  
Vol 3 (1) ◽  
pp. 36-45 ◽  
Author(s):  
Werlem Holanda ◽  
Sergio Bergamaschi ◽  
Anderson Costa dos Santos ◽  
René Rodrigues ◽  
Luiz Carlos Bertolino
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Fuel Oil ◽  
Insoluble Residue ◽  
X Ray ◽  
Irati Formation ◽  
Paraná Basin ◽  
Rock Eval ◽  
Parana Basin

Currently, the Irati Formation, in Paraná Basin, Brazil, represents one of the world's largest reserves of oil shale. Among the shale-derived products stands out the fuel oil, gas, naphtha, fuel, liquefied gas, and sulfur, in addition to byproducts that can be used by the asphalt, cement, agricultural, and ceramics industries. This study describes and illustrates features of organic-rich shales of the Lower Permian Assistência Member, Irati Formation, scanning electron microscopy (SEM) was combined with energy-dispersive x-ray spectrometric (EDS), x-ray diffraction (XRD), total organic carbon (TOC), total sulfur (S), insoluble residue (IR) and Rock-Eval pyrolysis to characterize the mineral composition, organic matter distribution and different types of pore at the micrometer scale. These analyses were performed on samples from well SP-32-PR located in the Sapopema township, Northeast Paraná State, in South of Brazil. The investigations demonstrated that the Assistance Member has high total organic carbon (TOC) content, generation potential (S2) and hydrogen index (HI), but is in an immature stage. The mineralogical content of the Assistência Member presents intervals rich in quartz, plagioclase, carbonates and clay minerals. Pores distribution includes intraparticle within organic matter and interparticle pores in pyrite framboids, surrounding quartz grains and between organic matter and mineral grains. ResumoAtualmente, a Formação Irati, na Bacia do Paraná, no Brasil, representa uma das maiores reservas mundiais de Petróleo de xisto. Entre os produtos derivados do xisto, destacam-se o óleo combustível, gás, nafta, combustível, gás liquefeito e enxofre, além de subprodutos que podem ser utilizados pelas indústrias de asfalto, cimento, agricultura e cerâmica. Este estudo descreve e ilustra características de xistos ricos em matéria orgânica do Membro Permiano Inferior Assistência, Formação Irati. Microscopia eletrônica de varredura (SEM) foi combinada com Espectrometria de Raios-X de energia dispersiva (EDS), Difração de Raios-X (XRD), carbono orgânico total (COT), enxofre total (S), resíduo insolúvel (IV) e pirólise Rock-Eval para a caracterização da composição mineral, distribuição da matéria orgânica e diferentes tipos de poros à escala micrométrica. Essas análises foram realizadas em amostras do poço SP-32-PR localizadas no município de Sapopema, no nordeste do Paraná, no sul do Brasil. As investigações demonstraram que o Membro de Assistência possui elevado teor de carbono orgânico total (TOC), potencial de geração (S2) e índice de hidrogênio (HI), mas está em um estágio imaturo. O conteúdo mineralógico do Membro Assistência apresenta intervalos ricos em quartzo, plagioclásio, carbonatos e minerais argilosos. A distribuição dos poros inclui intra-partículas na matéria orgânica e poros inter-partículas em framboides de pirita, nos grãos de quartzo circundantes e na matéria orgânica e noutros grãos minerais.

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