FCT - Trabalho de Conclusão de Curso

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Navegando FCT - Trabalho de Conclusão de Curso por Autor "Arab, Paola Bruno"

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    Caracterização dos perfis de solo derivado da fácies anortosito da suíte Córrego das Campinas, associado à ocorrência de caulim, na região de Porangatu, Trombas e Santa Tereza de Goiás, Goiás
    (Universidade Federal de Goiás, 2024-08-03) Maia, Débora Santos; Lima, Hugo Figueiredo de; Vieira, João Emerson Vasconcelos Leite; Reis, Mateus Andrade; Reis, Mateus Andrade; Canile, Fernanda Maciel; Arab, Paola Bruno
    Considering the countless applications of clay minerals in the industry in its most diverse ramifications, the present work sought to characterize the soil profiles in the triple border of the municipalities of Trombas, Porangatu and Santa Tereza de Goiás, in the State of Goiás. In order to characterize the type of existing material, which uses and how it occurs throughout the entire study area. To this end, it was necessary to map the occurrences of rock and soil, analyze the physical, chemical and mineralogical properties of the soils and its horizons. Then it was carried out photo interpretation work looking for clear exposures of soils (clearances) and rock exposures. During the field activity, systematic sampling of variations in soil intervals and soil types was carried out, in addition to rock sampling. Sampling was done in the form of channel and spot sampling. Subsequently, geochemical analysis and geotechnical tests of the material were carried out in the laboratory. Therefore, it was verified that the existence of kaolinite, the main constituent of kaolin. The kaolin in the locality is primary, resulting from the alteration of the source rock (anorthosite) and is mainly associated with the B horizon of the soil. It is commonly noted that a superficial laterite crust, associated with alluvial deposits, contains concentrations of iron and titanium oxides in the kaolin, which interfere with the color of the material, making it possible to identify horizons of different colors such as red, yellow and white. It can be concluded that the soil profile in the study area is mostly composed of clay minerals, laterite crust and alluvial deposits. The color of the kaolin horizons is mainly due to the iron present in the laterite crust and minerals present in the anorthosite. It is necessary to process the material to remove the iron for applications in industry in general.
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    Mapeamento geológico 1:20.000 da Região Norte do depósito de cobre do município de Bom Jardim de Goiás - GO
    (Universidade Federal de Goiás, 2024-11-29) Oliveira, Bruna Edriane Ramos de; Temporim, Filipe Altoé; Arab, Paola Bruno; Arab, Paola Bruno; Cavalcanti, Débora Ezequiel; Silva, Felipe de Lima da
    The Bom Jardim de Goiás (BJG) region is part of the geological context of the Arenópolis Magmatic Arc, located in the far west of Goiás. It became the object of research in the 1970s, after the Geological Survey of Brazil (CPRM) identified radiometric anomalies on the edge of the Serra Negra Granite, which led to the development of extensive research projects. Despite this, the geological complexity of the region and the typology of the deposit are still not fully understood. The Bom Jardim de Goiás Metavolcanosedimentary Sequence features a diversity of volcanic rocks, ranging from metabasalts and metandesites to rhyolites, while the sedimentary portion includes metaconglomerates, phyllites and quartzites. The intermediate tuffs contain a small deposit of copper sulphides, initially associated with volcano-exhalative processes. The general objective of the work was to carry out detailed geological mapping of the northern region of the Bom Jardim de Goiás copper deposit, with the aim of improving understanding of the deposit model by integrating data from aerial images, geophysics, field studies and laboratory analyses. Specifically, the aim was to draw up a 1:20,000 scale geological map with geological profiles, correlate maps of magnetometric and gammaspectrometric domains and homologous zones, carry out detailed petrographic descriptions and reinterpret the structural geology of the area. The study covered an area of 24 km², with semidetailed geological mapping integrated with the interpretation of aerogeophysical data, photointerpreted satellite images and petrographic descriptions. Based on this data, a reinterpretation of the structural geology was proposed and, based on historical information, comparisons were made with the geological model of the deposit. In the pre-field phase, a bibliographic survey and compilation of historical data were carried out. During the field phase, geological mapping was carried out, hand samples were taken and structural data was obtained. In the post-field phase, the geological map and data were prepared in a GIS environment, petrographic description, structural interpretation with stereograms and rosette diagrams, and the information was consolidated in a report. The work involved geological-structural mapping of an area made up of basic and metavolcanosedimentary rocks from the Paleoproterozoic, with the aim of detailing their lithological and structural characteristics. During the study, it was possible to individualize the Metabasalt Lithofacies in the Córrego da Furna Formation, based on magnetometric responses, in addition to identifying new, previously unknown occurrences of sulphides. This data made it possible to propose a different deposit model from the existing ones, contributing to understanding the geological evolution of the area. The analysis also indicated the possible continuity, to the north, of the copper deposit previously identified by CPRM, broadening the region's exploration prospects. In structural geology, four structural domains were defined and at least three phases of deformation recorded in the lithologies were recognized. Domain 1, associated with the Cuiabá Group rocks, has a N-S structural trend and isoclinal folds related to the D1 deformation. Domain 2 covers the Morro do Urubu, Aldeinho and Morro Selado Formations of the BJG Sequence, with a N-S trend and dips to the E and W. Domain 3, associated with the Córrego da Furna and Córrego da Aldeia Formations, where the copper deposit to the south is located, showed the main S1 foliation subdivided into two pole patterns: one in the NE-SE quadrants and the other in the NW-SW quadrants. This garland pattern suggests a second phase of deformation and was the only one to differ from the bibliography. Finally, Domain 4, related to the Serra Negra Granite Unit, showed structures oriented predominantly to the east. These results highlight the tectonic complexity of the area and provide new information on its structural evolution.
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    Mapeamento geológico integrado 1:50.000 da região da Serra da Jiboia (GO) - área 4
    (Universidade Federal de Goiás, 2023-02-15) Santos, Daniel Carelli Batista; Carvalho, Franklin Williams Silva de; Lima, Gabriel Dutra de; Temporim, Filipe Altoé; Temporim, Filipe Altoé; Oliveira, Ítalo Lopes de; Arab, Paola Bruno
    The present work had as objective the geological mapping in the region of Nazário - GO from the accomplishment of systematic works that integrated data from remote sensing (orbital images), geophysical, geochemical, lithological, petrographic, structural and geoenvironmental surveys. The result of the integrated work was the geological cartography of Neoproterozoic units associated to the Goiás Magmatic Arc: Metavolcanosedimentary Anicuns-Itaberaí Sequence, Anápolis-Itauçu Complex, Creoulos Granite and Santa Bárbara Anorthositic Complex. Four deformational stages were recognized in the area: D1 represents E-W compression associated with regional folds with eastward vergence; D2 is the E-W compression refolding of the D1 progression; D3 characterizes shallower crustal level change during deformation progression and generates N-S lateral shortening of the D2 deformation and N-S axis crenulations; D4 represents the ruptile-ductile stage of E-W compression with formation of shear zones and thrust faults. In general, the rocks of the Anicuns-Itaberaí Metavolcanosedimentary Sequence in the study area are metamorphosed between green schist and amphibolite facies with retrometamorphism to green schist facies. The region is relevant for understanding the evolution of the Brasília Belt, as the rocks are linked to tectonic and magmatic events that started with in the formation of the Magmatic Arco f Goias. The study area is economically interesting due to the presence of mineral occurrences with potential for metallurgy (manganese and iron) and civil construction (sand, gravel, crushed stone and ornamental rocks).
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    Mapeamento geológico-geotécnico: mina de Barro Alto - GO, Anglo American
    (Universidade Federal de Goiás, 2022-10-14) Santos, Lavoisier Matias dos; Arab, Paola Bruno; Rodrigues, Sérgio Wilians de Oliveira; Rodrigues, Sérgio Wilians de Oliveira; Temporim, Filipe Altoé; Lima, Martha Noélia
    The Barro Alto Mafic-Ultramafic Complex is part of the Goiás Massif, which is inserted in the geological context of the Tocantins Province. The deformations associated to the amalgamation of Gondwana generated in the study area a series of structures and deformation stages. A schistose (S1) subparallel to the compositional banding (S0) is characterized. Boomerang-like refolding patterns associated with flexural slip mechanisms are also observed. Conjunctively, a NE-SW and NW-SE fracture system compatible with idealized fracturing models associated with cylindrical flexural folding are observed. The Barro Alto supergene nickel deposit is composed of lithological units derived from ultrabasic rocks - dunite-serpentinized, dunite boulder, base ore, acid ore, ferruginous ore, internal waste rock, soft chalcedony, hard chalcedony and laterite soil. Nickel extraction in Barro Alto is characterized by open pit mining, which consists of excavation of the soil or soft rock and consequent modification of the topography. These modifications must be technically planned, in order to optimize resources and increase safety levels. Saprolitized heterogeneous massifs are composed of reliquary structural features, rock blocks immersed in the weathered profile (bedrock), and irregular zones with contrasting weathering. These heterogeneities usually control the failure mechanisms and locations, as well as the factor of safety. For this work, in addition to good internal practices, the geological-geotechnical characterization was carried out based on the recommendations suggested by the ISRM and the criteria established by the RMR rock mass classification system (Bieniawski, 1989). The geological-geotechnical characterization indicated a rather heterogeneous and anisotropic massif. Furthermore, the simple kinematic analysis performed as a preliminary study obtained indices higher than 0.1 (10%) for planar and wedge type ruptures.