A seqüência mafra superior \ Rio Do Sul inferior (Grupo itararé, permocarbonífero) em sondagens testemunhadas da região de mafra (SC), Margem Leste da Bacia do Paraná

The Permo-Carboniferous Harare Group crops out in the Matra area, represented by Campo do Tenente, Mafra and Rio do Sul formations; they correspond in subsurface to Lagoa Azul, Campo Mourão and Tacïba formations. A composite sampling of the Group was performed through drilling of six wells, which average 60 m in depth; three of them cored the depositional sequence here designated as Upper Mafra\Lower Rio do Sul. The Upper Mafra Formation were sampled by TC-4 and BR-5 wells, and it consists of three units: the lower two are sandy, glacial-deltaic and fluvial-deltaic in origin, corresponding to a lowstand tract. The last unit is composed of two dirtying-upward successions of sandstone, diamictite and rhythmite, interpreted as deglaciation/transgressive events, and well represented in BR-5 drilling. The Lower-Rio do Sul Formation (Lontras Shale) is formed by two marine units: the lower one is represented by shale and bioturbated siltstone which culminate the previous deglaciation, transgressive succession, while the upper one, sampled by SL-2 well, is formed by shale and thin, turbidite sandstone, attributed to a highstand tract.

Grupo itararé (P - C da bacia do Paraná) nas regiões de Limeira e Piracicaba - SP: Contribuição ao estudo das litofácies

The Permian-Carboniferous Itararé Group is one complexe lithostratigraphic unit of the Paraná Basin, southeastern Brazil, typically marked by discontinuity of its lithofacies. Under the exploratory point of view, the unit represents one of the most significant intervals of the basin, since several occurrences of mineral and energetic resources are associated to it, as groundwater, petroleum and coal. The prospection and exploitation of these resources depend on a good understanding of the stratigraphic architecture and the paleogeography. There are many contributions on the specialized literature which deal with this subject, although the regions of Limeira and Piracicaba (superior portion of the unit) still lack new investigations, which may contribute to the understanding of its lithofacies and related sedimentary processes. It was analyzed the sedimentary sets pilling up, followed by stratigraphic correlations between the two regions. Moreover, from sedimentary structures, it was made paleocurrent measurement with the purpose of obtaining indicative patterns of the sedimentary polarity, contributing for the comprehension of the paleogeography. Recent studies in the Domo de Pitanga region (between Rio Claro and Piracicaba cities) and in the Corumbataí river drainage basin, were taken also as basis for possible correlations. It was obtained a frame of the lithofacies arrangement, their vertical and lateral relations, as well as their depositional polarities.

Análise faciológica e rochas-reservatório do Grupo Itararé (permocarbonífero) no sudeste do estado de São Paulo

Pós-graduação em Geologia Regional - IGCE

Palinologia do grupo Itararé em Salto, Estado de São Paulo (Bacia do Paraná, carbonífero superior)

Pós-graduação em Geologia Regional - IGCE

Palinoestratigrafia na passagem do grupo Itararé ao Guatá (carbonífero-permiano) no sul do Estado do Paraná e norte do Estado de Santa Catarina, borda leste da Bacia do Paraná

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estratigrafia de seqüências do Grupo Itararé (Neocarbonifero-Eopermiano) na região de Rio Negro (PR) - Mafra (SC)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Bivalves da Formação Taciba, Cisuraliano, Grupo Itararé, Bacia do Paraná, e seu significado bioestratigráfico e paleoambiental no contexto da glaciação neopaleozóica no Gondwana central

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise de fácies sedimentares e de paleocorrentes das sequências inferiores do grupo Itararé, Centro-Leste do estado de São Paulo

The Itararé Group is the record of one of the most significant glaciation events of the Gondwana. Of neocarboniferous-eopermian age, this unit has facies associations interpreted as resulted from shallow marine settings with glacial and deglacial water influence. The role of glaciers on the tectonic-sedimentary processes of the Itararé Group is striking, as typical facies such as diamictites, tilites, shales and rhythmites with dropstones are generated, besides the existence of glacially striated and polished surfaces. This work had as main goal to contribute to the geological knowledge of the Itararé Group in the central eastern portion of São Paulo State, using as basis outcrops from Itu, Salto and Porto Feliz, and also pertinent bibliographic data and well profiles located in the surrounding areas. About the stratigraphic framework, genetic association and paleogeography of these deposits, this work concludes that the area studied comprises the basal section of the Itararé Group. The stacking of the facies recognized during the field work begins with the striated and polished surfaces of the basement, described in Salto, superposed by tilites and diamictites with glacial movement features. Over these are the turbidites from Itu, associated with the glacier retreat. The outcrops of Porto Feliz are at the top of this succession, with deposits generated by flows with lateral and vertical variations, sometimes with prevalence of tractive conditions, and sometimes with sediments transported largely by suspension. Paleocurrent measurements show main flow directions towards NW, the same as glacial striae, suggesting the influence of reworking of sediments by the meltwater during deglacial periods

Caracterização dos depósitos glaciais permo-carbonífero no sul de Minas Gerais, Brasil: Formação Aquidauana ou Grupo Itararé?

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Caracterização Tecnológica das Rochas Ornamentais do Maciço Capão Bonito, SP

The Capão Bonito Granitic Massif is situated in the south portion of the São Paulo State and represents an elongate body with general direction NE-SW, intrusive in epimetamorphic rocks of Açungui Group (Votuverava Formation), and in granitic rocks of the Três Córregos Complex. It is partially covered by sedimentary rocks of the Paraná Basin (Itararé Group). As the chief type we have red sienogranite, holo to leucocratic with biotite and rare hornblende, inequigranular with medium to coarse grains to porphiritic and isotropic to slightly cataclastic textures of marginal zones. This granite was analyzed for petrographics (composition, structure and texture), chemical composition (major elements), physical and mechanical (water absorption, resistance to abrasion, impact of hard body and efforts of compression and traction) and chemical attack aspects. The results were compared to suggested values for granitic rocks used for ornamental purposes. The whole massif shows compositional, textural, structural (related to isotropy) and chemical (major elements) characteristics very homogeneous. The varieties of sienogranite named commercially as Capão Bonito or Rubi Red Granite showed results very similar to each other, with some variations in the physical and mechanical resistance resulting of the penetrative brittle deformation of regional occurrence, evidenced by differences in the microfissural index.

Caracterização geoquímica e cerâmica das argilas do Grupo Itacaré / Formação Aquidauana, na faixa aflorante entre os estados de São Paulo e sul de Minas Gerais

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

COBERTURAS SEDIMENTARES CENOZÓICAS DA BACIA DO RIO JUNDIAÍ – SP.

Este trabalho apresenta a caracterização geológica das coberturas sedimentares cenozóicas da bacia do Rio Jundiaí e suas relações com a evolução geológica regional. Sobre o Embasamento Cristalino, ocorrem depósitos paleozóicos pertencentes ao Grupo Itararé, depósitos terciários e quaternários. Os depósitos terciários constituem ocorrências locais, pois grande parte das seqüências foi removida pela erosão e os restos estão quase sempre encobertos pelas coberturas mais jovens. Correspondem a um antigo sistema de leques aluviais com área-fonte na Serra do Japi e sua origem se associa à formação das escarpas de falhas que controlam as áreas serranas. Os depósitos colúvio-eluviais são constituídos por material areno-argiloso maciço com linhas de pedra basais, que compõe corpos descontínuos controlados por estruturas geológicas. Os depósitos aluviais também acompanham importantes direções estruturais. A distribuição destas coberturas é condicionada pelo relevo, onde conjuntos de falhas de direção predominantemente NW-SE promoveram o abatimento da porção central da área, controlando a implantação da bacia hidrográfica do Rio Jundiaí. A ocorrência de depósitos aluviais em locais onde atuam esforços transtensivos é de grande importância para a exploração dos recursos hídricos subterrâneos. O afeiçoamento da paisagem condicionado por fatores endógenos atesta a importância dos processos neotectônicos em ambiente intraplaca.

Papel da tectônica rúptil na possível migração de hidrocarbonetos: estudo da porção noroeste da estrutura de Pitanga, região central do estado de São Paulo

This work presents structural studies in the northwestern portion of the Pitanga Structural High, between the towns of Ipeúna and Charqueada. The area is composed by the sedimentary rocks from Paraná Basin, represented basically by Paleozoic rocks (Itararé Group, Tatuí, Irati and Corumbataí formations) and Mesozoics rocks (Pirambóia and Botucatu formations), in association with lower Cretaceous intrusive basic rocks expressed by dikes and sills. The most important structural features are distensive faults, which put together unleveled tectonic blocks and are frequently filled by diabase dikes. In this context, the main objective of this work is the study of local structures and the recognition of the tectonic association between dropped and uplifted blocks, jointly with the caracterization of a production, migration and storage model for hydrocarbons. Through the interpretation of aerial photos, field recognitions, structural and laboratorial analysis, a normal fault with direction of N30W and a slip of 20-25 meters located south of Ipeúna was recognized this fault puts the Tatuí and Irati Formations side by side. At this place and by the SP-191 route (north of Ipeúna city), sandstones from the top of Tatuí Formation are impregnated by asfaltic material. The data interpretation shows that local fault systems with NW directions have played a determinant part in the fault blocks arrangement, placing sandstone lenses from Tatuí Formation topographically above the oil shales from Irati Formation. In addition, these systems acted as migration paths to transport and storage hydrocarbon in sanstone lenses from Tatuí Formation

A cunha do ciclo de fácies do Grupo Guatá (Eopermiano) na margem sub-aflorante do norte paranaense

A wedge facies cycle it‟s a body of sedimentary rock, bounded above and below by unconformity and which represents a transgressive-regressive cycle of deposition. This cycle is formed by the following succession of facies: non-marine (N), transitional-coarse texture, and marine-fine texture; The objective of this study have been members of the sandstones and Triumph Siderópolis, seconded by rare calcareous sandstones and very thin limb Paraguaçu. Through analysis of facies in wells testified by CPRM, it was possible to group on facies successions and set the standard stacking. The Triunfo Member consists of three cycles of facies, lithology whose standard indicates a vertical arrangement ''type'' tuning up, other words, a component sandy bottom in the form of '' box'', followed by components sandy-clayey and clayey-carbonaceous (1st and 2nd cycle) and / or shale and limestone (3rd cycle), represented by the base member Paraguaçu. The first cycle only occurs on NF-5 wells and NF-6 in the form of Onlap channel dug in post-Itararé group. The cycle II also reaches wells NF-4 and NF-3 to the north, while the cycle III reaches the southern area, well NF-9. The member Paraguaçu, well PP-25 is predominantly clay-síltico, also stand out limestones and sandstones. The limestones are not coastal marine organisms probably connected with the algae and cyanobacteria, the sandstones are fine-textured, very thin and coastal deposition environment. The member Siderópolis, well NF-2 consists of a sandstone fluvial-estuarine deployed in the valley section, and succeeded by sandstones and siltstones bioturbed, they have linked the transgression of the Fm. Palermo