http://www.bdtd.uerj.br/handle/1/3660 Thu, 14 May 2026 23:02:11 GMT 2026-05-14T23:02:11Z http://www.bdtd.uerj.br/handle/1/24680 Título: Fossildiagênese de tafocenoses de vertebrados quaternários de depósitos de tanque do Nordeste do Brasil Autor: Martins, Gustavo Prado de Oliveira Primeiro orientador: Araújo Júnior, Hermínio Ismael de Abstract: Tank deposits of northeastern Brazil have a long been studied, with currently many areas, including taphonomy, being the focus of said studies. While taphonomic studies have been done in those deposits, they have mainly focused in the biostratinomic aspects, resulting in a lack of fossildiagenetic data from these deposits. This study is focused in four tanks (, Lagoa do Santo, Currais Novos County, Rio Grande do Norte State; Riacho Verde, Ouro Branco County, Rio Grande do Norte State; Camp Alegre, Taperoá County, Paraíba State; and Lagoa do Rumo, Baixa Grande County, Bahia State), where a fossildiagenetic analysis of vertebrate bone thin sections collected from said tank deposits will be performed, as well as the interpretation of the fossildiagenetic data by means of statistical analysis tools and the comparative analysis between locations. The statistical analysis of the data shows that all four locations have some common characteristics: Permineralization with oxide, carbonate, quartz and pyroxene, Replacement by oxide and carbonate, Fracturing by desiccation, Fracturing under subaquatic conditions and Histological Indexes 3 and 4.. These common characteristics could be a possible result of the tanks being geographically close and thus being subjected to similar paleoclimactic conditions. The statistical data also highlights striking differences, with special mention being given to the Lagoa do Rumo tank, where “Prolonged Desiccation”, “Permineralization Index between 70 and 80”, “Replacement Index between 80 and 90” and “HI 5” characteristics are dominant, while also being rare in the other three locations. The differences observed were interpreted as being the result of the relationship of the tank deposit with both the geological characteristics of the surrounding area (such as the composition of the surrounding rocks), as well as with the nearby drainages. The comparison between the observed mineralogy and the geological characteristics in the area has made it possible to identify a possible source for the detrital minerals in the Riacho Verde tank, as well as a possible paleocurrent, a previously nonexistent data. Based on the data obtained it became possible to deduce the following: (i) permineralization and substitution are the main fossildiagenetic processes occurring in the tanks; (ii) the locations were subjected to similar processes but with different intensities; (iii) the drainages have strong influence in the manner in which the detrital minerals occur as well as being vectors for the transportation of Fe2+ ions; (iv) every location has shown evidence of time-averaging; (v) three of the location have varying values for the concentration of Fe2+ ions and this results in the intercalation of oxide and carbonate in the pores; (vi) the osteocyte lacunae are preferential locations for the deposition of oxide and this opens up the discussion about the influence blood has in the formation of oxide; (vii) every location has been affected by seasonality since they have evidence of desiccation and high water availability; (viii) every location has fractures but each location has a different process dominating and this results in different patterns dominating in each tank; (ix) in the Riacho Verde tank there is evidence of variation in the acidity levels in the sedimentation location. Instituição: Universidade do Estado do Rio de Janeiro Tipo do documento: Dissertação Fri, 30 Aug 2019 00:00:00 GMT http://www.bdtd.uerj.br/handle/1/24680 2019-08-30T00:00:00Z http://www.bdtd.uerj.br/handle/1/16976 Título: Análise e interpretação estratigráfica baseada na integração de dados de poços do intervalo Eossiluriano ao Eocarbonífero da Bacia do Parnaíba Autor: Bianchini, Aline Ramos Primeiro orientador: Bergamaschi, Sérgio Abstract: The sedimentary section of the Early Silurian to Early Carboniferous in the Parnaíba Basin encompasses two lithostratigraphic units: the Serra Grande Group and Canindé Group, which are interpreted and reported in the current literature as supersequences limited by erosive events of regional character related to the Caledonian and Hercinian orogenies. This stratigraphic interval was analyzed based in geophysical data (gamma ray logs) and geological data (lithologic interpretation from the composite well logs) of wells drilled by the oil industry. Additionally, some 2D seismic data was used as support to partial interpretation. The variations in the pattern of the geophysical well logs (gamma ray) were interpreted as representative of lithofaciologic variations which was corroborated by the lithological description of the composite well log. The variations in the pattern of the geophysical well logs (gamma ray) was interpreted as representative of lithofaciologic variations which was corroborated by the lithological description of the composite well log. A sequence stratigraphic analysis based in the principles of T-R Sequence was applied to this data. This analysis allowed to propose a model to the stratigraphic evolution to the studied section, as constituted by 5 depositional sequences which showed a pattern of a progressive drowning of the basin until its maximum identified in the maximum flooding surface in the Devonian Sequence (E-SEQ-4). From this maximum the depositional pattern reverses to a transgressive trend. Within this stratigraphic context, the integration of the produced data and the information available from literature allowed the proposition of depositional models to the system tracts of the Silurian-Devonian (E-SEQ-3) and Devonian (E-SEQ-4) sequence. The proposed depositional models vary from continental depositional environment in the transgressive system tract 3, in the Silurian-Devonian Sequence, to a marine depositional environment in the regressive system tract 3, following to the Devonian Sequence (E-SEQ-4) with marine depositional environment in the transgressive system tract 4 and to the shallow marine environment in the regressive system tract 4 Instituição: Universidade do Estado do Rio de Janeiro Tipo do documento: Dissertação Fri, 29 Jun 2018 00:00:00 GMT http://www.bdtd.uerj.br/handle/1/16976 2018-06-29T00:00:00Z http://www.bdtd.uerj.br/handle/1/16975 Título: Geologia, geoquímica e geocronologia da Região de Nova Prata, Dianópolis - TO: Terreno Almas-Dianópolis, Faixa Brasília Setentrional Autor: Torós, Bernardo Mendonça Primeiro orientador: Heilbron, Monica da Costa Pereira Lavalle Abstract: The research presents new geological and structural data, in 25.000 scale, besides geochemistry and geochronology data of the Nova Prata target, located south of the Almas town, SE of Tocantins State. The region was prospect for gold, and several mines were described. In the geotectonic context is located in the NE segment of the Internal Domain of the Brasília belt, made up by Paleoproterozoic to Mesoproterozoic basement associations. In target area, seven lithological units were mapped in detail: two associations of orthogneisses, phyllonitic rocks, muscovite chlorite schists, greenschists, leucogranite and andesite-diorite bodies. The structural analysis resulted on the characterization of ductile phases including the Dn + Dn+1 main phases with the development of the main foliation and the stretching lineation, the Dn+2 late folding, besides and brittle structures as faults and fractures. Based on geometry, two structural domains separated by an oblique NE-SW fault, with reverse and dextral components, were characterized. Two generations of quartz veins were identified, the fist one parallel to the main foliation and related to the metamorphism, and the late one with irregular distribution. The southern domain is dominated by a penetrative N-S trending foliation, while the Northern domain is marked by a NE-SW foliation, discrete thrust shear zones and tight to open folds. Geochemical data suggest cordilleran arc-related to collision orogenic environments. New LA-ICPMS U-Pb data detected two magmatic pulses: the older one is represented by the southern orthogneisses with crystallization ages of ca. 2,46Ga, while the youngest one is defined by the ca. 2.2 Ga orthogneisses of the northern segment, that also display inherited zircons of the same age of the oldest group. Sm-Nd isotopic data for both the orthogneisses and diorite–andesite dykes point out the cordilleran setting, with reworking of older crustal rocks and some juvenile contribution, as suggested by weakly negative and positive εNd values Instituição: Universidade do Estado do Rio de Janeiro Tipo do documento: Dissertação Thu, 19 May 2016 00:00:00 GMT http://www.bdtd.uerj.br/handle/1/16975 2016-05-19T00:00:00Z http://www.bdtd.uerj.br/handle/1/16966 Título: Aplicações da modelagem sísmica direta na calibração de decomposições espectrais e na caracterização de reservatórios em zonas de acunhamento, estudo de caso: Campo de Peregrino, Bacia de Campos-RJ Autor: Reis, Téo Paiva dos Primeiro orientador: Pereira, Egberto Abstract: Seismic or geological events, when in a thinning zone and gradually reducing their thicknesses in relation to their (seismic wavelet) wave-length, tend to suffer seismic interference. This interference harms their vertical resolution capacity, as they get thinner and thinner. The seismic spectral decomposition method, rises as an additional method to go beyond the limitations of the standard seismic resolution, especially if being applied as RGB color blends. From the calibration of the spectral decomposition method through forward models (controlled models) populated with inputs (primary velocities and densities) from an applied Bayesian probabilistic seismic inversion, resulting in a synthetic seismic dataset where the method was tested. From correlations between the synthetic/controlled/calibrated seismic data results, the workflow was then applied to the real dataset of a limited area on Peregrino Field, Campos Basin, RJ. Through the proposed workflow just above, this study aims to increase the confidence level of pinch-out interpretations of this portion on the Peregrino turbiditic reservoir, and aims for an improvement on the vertical resolution limits of the seismic data of the analyzed area. As this synthetic model describes the same pinch-out thinning behavior as observed in the real seismic, it was run into a spectral decomposition workflow having its results correlated / compared to the same workflow run proposed for the real seismic and looking for the resolution increase, depositional/ erosional patterns, as well as helping the allocation of future targets in these previously non-resolsoved areas Instituição: Universidade do Estado do Rio de Janeiro Tipo do documento: Dissertação Thu, 27 Jul 2017 00:00:00 GMT http://www.bdtd.uerj.br/handle/1/16966 2017-07-27T00:00:00Z