Programa de Pós-Graduação em Geologia e Geoquímica - PPGG/IG
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2603
O Programa de Pós-Graduação em Geologia e Geoquímica (PPGG) do Instituto de Geociências (IG) da Universidade Federal do Pará (UFPA) surgiu em 1976 como uma necessidade de desmembramento do então já em pleno desenvolvimento Curso de Pós-Graduação em Ciências Geofísicas e Geológicas (CPGG), instalado ainda em 1973 nesta mesma Universidade. Foi o primeiro programa stricto sensu de Pós-Graduação (mestrado e doutorado) em Geociências em toda Amazônia Legal. Ao longo de sua existência, o PPGG tem pautado sua atuação na formação na qualificação de profissionais nos níveis de Mestrado e Doutorado, a base para formação de pesquisadores e profissionais de alto nível. Neste seu curto período de existência promoveu a formação de 499 mestres e 124 doutores, no total de 623 dissertações e teses.
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Item Acesso aberto (Open Access) Aplicação de dados SRTM (Shuttle Radar Topography Mission) no estado do controle neotectônico da rede de drenagem e microbacias hidrográficas, na região de Urucu e Adjacências (AM)(Universidade Federal do Pará, 2009-09-01) PINTO, Marcelo Lima; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228Geologic studies of the Neogene of the Amazon have shown significant evidence of recent tectonic processes, analysis, particularly from the structural control of the valleys and rivers. Given this context, the objective of this study referred to the research area of neotectonic Urucu and Surroundings (AM) through the structural analysis of drainage systems and topography from digital products, namely, images SRTM (Shuttle Radar Topography Mission). The understanding of the latest tectonic structure, the region of Urucu (AM), is fundamental in defining the current landscape geometry. Thus, this study was crucial for the recognition of reactivated structures (NE-SW, NNE-SSW, NW-SE) and neoformed (EW and ENE-WSW), which certainly influence the control of landscape drainage and relief during the Neogene to the present. The initial analysis of alignments of drainage and relief from SRTM images allowed the interpretation of two main sets of discontinuities. The first set includes the structures oriented EW and ENEWSW, which are associated guidelines NE-SW and NNE-SSW. The second set brings together the structures positioned to NW-SE and NNW and SSE. The first set relates to a structure with probable transcurrent movement, where NE-SW orientations represent "splays" who are willing to make up a structural sigmoidal-like duplexes directional. Structural assemblies oriented NNESSW seem to represent a second pulse within that directional movement / transpressive. The second set is represented by discontinuities NNW-SSE. These guide the geometry and impose asymmetries in the drainage network, which are compatible with the definition of "fronts" and reverse in relief. The landscape seen resembles those developed drives dip-slip "normal. A second pulse of drive geometry of normal fault oriented NW-SE limits floodplains and causes the dam's natural river system, providing displacement of fluvial channels. Latter pulse probably occurred during the Holocene. Also, based on geophysical data type field of Total Reduced IGRF (International Geomagnetic Reference Field) can be seen that there is a strong correlation between neotectonic structures and magnetic anomalies, indicating that the structures are associated with the newly formed structures EW and ENE-WSW and structures of reactivation of ancient structures are presented with directions NE-SW, NNE-SSW, NW-SE.Item Acesso aberto (Open Access) Aplicação de geoprocessamento na análise ambiental das bacias hidrográficas do Igarapé Juruti Grande e rio Aruã – Juruti – Pará(Universidade Federal do Pará, 2007-03-26) TANCREDI, Nicola Saverio Holanda; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228The study area is located in the region of Juruti, enclosing the river Juruti Grande and Aruã watershed, with 4,560 km2. The region within equatorial humid climate has a mean annual precipitation of 2,223 mm, showing dense forest with great number of vegetal species. The pedology shows essentially yellows latossolos and in the Amazon river flooding plains, hydromorfic soils. This region is placed in Amazon Sedimentary Basin within superior part, a thick package of Cretaceous rocks, poor consolidated, of the Alter do Chão Formation, being recovered by Quaternary aluvial deposits, distinguished that of the Amazon river floodplain. The Juruti Grande and Aruã’s watershed present good conservation condition. However, the Juruti Project for explotation of bauxite is developed in the plateaus of these basins, by Alcoa Inc., passing this area for intense speculation, with great pressure on the environment, being necessary periodic monitoring by competent agencies for maintenance of the balanced ecosystem. Thus, the geoprocessing blunts as an efficient, fast alternative and low cost for this environmental monitoring, evidenced in these research. It were made use of methodologies to manage the natural capital of the inquiry area, developing geographic information systems (GIS), therefore has vital paper in the administration of the space information of the environment, easing the management by digital way of cartographic data and allowing them elaboration of prognostics and diagnostics of environmental problems, underlying the planning and the decision makes. In this way the application of GIS in the inquiry area have great value, once the region of Juruti passes and will pass, for great transformations in ecological and social-economic aspects, letting only more, a marginal region from Amazonia. In the GIS’s building for this area, accomplished the storage of the geometry and the attributes of georreferencing data, radar and satellites images, acquiring in the years of 1972, 1986, 1997, 2000, 2001 and 2005. The multitemporal boarding allowed access information of qualitative and quantitative evolution of the land use and alterations of the natural vegetal covering, making possible, modified analysis of biomas among the different compared years, understood as basic for initial evaluations of the ecology of the landscape, overall with respect to its land covers. The computational procedure made possible an initial evaluation of metric parameters (overall related the paisagistic diversity) of automatic manner, beyond the generation of digital thematic maps. The development and application of these technological methodologies (geoprocessing and remote sensing applied at images of radar and satellites), in the Juruti region, made possible the generation of diverse representative products, as the multitemporal land use maps, declivity correlation with the relief, drainage trends, and others. The thematic and land use classification maps of the area had presented the evolution of landcovers in the four years used as reference. The application of the kappa’s index for the quality of the thematic mapping evaluation pointed a result of 0,72, indicating a very good classification. The thematic maps and the respective comparative graphs had shown that the forest area presented 91.8% of the area in the year of 1986; 87.22% in 1997; 85.57% in 2001 and 74,92% in 2005. The antropics and secondary forests areas, had increased proportionally to the reduction of the area of forests. The correlation map of declivity within relief presented predominance of areas with low declivity, specially the fertile swamp areas and that almost plain reliefs. The regions that had presented ondulate to strong reliefs are mainly, in the central part of the watershed. The interpretation of main neotectonic structures with detailed drainage network analysis considered the straight line trends as drainage trends. It was detected NE-SW directions well narrow characterizing long belts in SE part of the area. Near Amazon river it has NNE-SSW belts.Item Acesso aberto (Open Access) Aspectos neotectônicos e ecologia da paisagem em parte da área dos municípios do NE do estado do Pará (Tucurui, Baião, Breu Branco, Goianésia, Moju e Tailândia)(Universidade Federal do Pará, 2007-10-30) SOUZA, Francileide de Fátima Rocha; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228This work inside investigated the aspects of the landscape and geologic and geomorphological evidences of the neotectonic context in the region that understands the Tucurui Cities until Thailand (Pará). In this region the incidence of neotectonics processes was responsible for the generation of structures, sedimentary sequences, standards of draining net (Basin of the Tocantins River) and relief System. For execution of this study had been used Landsat ETM+ images for the digital processing in platform ENVI 4,0, digital Models of rise supplied by the SRTM/NASA and images of radar SAR analysis of the relief, draining and recognition of the lineaments expressives, analogical bases elaboration of cartographic bases in environment ArcGIS 9.1. The Analysis of the relief, in the investigated area, allowed to identify as genetic groups: ) Group of Degradation - Constituted of System of Mountain ranges (Mountain range of the Trucará) with flattened topos of amplitude varying between 253 and 290 meters, System of Mounts with angular topos up to 180 meters and Colinoso System with 0 amplitude varying it enters m (base level) up to 120 meters, which constitute most of the paisagística expression; b) Group of Agradação - Englobando Aluvial Plain Systems and System of Fluvial Terraces. These systems are shown with geometrias whose joints if give through the installation of discontinuities, characterizing morfoestrutural compartimentação. The integration of the data, deriving of the analysis of the relief, as well as the characterization of the anomalies of draining and the discontinuities, allowed to the recognition of "landorfms" elementary schools tectonics associates the beams of guided lineaments the E-W, NW-SE, NE-SW and N-S. The joint enters beams of neotectonics imperfections gives way to define one extensional romboedro to south of the parallel 3030"S. The romboedral structure is defined by the arrangement between beams of guided discontinuities to NW-SE, with symmetrical trend and apparent transtensive nature and guided beams of discontinuities the E-W, to the center of the area, with probable dominant component "strike-slip". This geometry is cut by to complicate structures guided to NE-SW. Three main beams of guided discontinuities the N-S affect the inquiry area, and represent "landforms" elementary schools tectonics with extensional trend. These structures had been interpreted as decurrent of the reactivation of the Cinturão Araguaia. They are organized in an anti-symmetrical structure with dominant diving for East and in the height of the meridian 49038W they seem to have strong bond with the tracing of the Tocantins River and imposes fort has controlled to the quaternary deposits. The draining net adjusts it to these standards of structural tropia readily, which answer for the presence of anomalous feições as arcs and elbows, and for the installation of standards in treliça, with strong asymmetry, some partially interpreted as treliça of imperfection. Morfogênese of the area in appraise, in that it concerns to its tectônics aspects was admitted as tied to the performance of a binary guided dextral the E-W, fruit of the dynamics established for the current phase of drift of the American South Plate for West.Item Acesso aberto (Open Access) Ecologia da paisagem da ilha do Mosqueiro, NE do estado do Pará.(Universidade Federal do Pará, 2005-06) SALES, Gil Mendes; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228This work investigated the physical parameters of the model of landscape of the Island of the Mosqueiro, in the Northeast of the State of Pará, in the Amazon region, using itself of investigative strategies that allowed insertions in the ambient order. In this chance the activities in the area of the geoprocessing. In the ambient context had been privileged this work present products of integration and other unknown ones whose idea is of instrumentalizer the local governmental politics, aiming at to contribute for improvement of the relation of the model of antropic occupation of the landscape versus maintenance of the quality and ambient preservation, in view of the necessity of if establishing a structure of adequate development to the current scenes. The importance of the District of Mosqueiro for Belém is unquestionable. Its history and tourist potential are peculiar; beyond the one that the island if establishes as important component to the social life, artistic, cultural and sporting of the majority of the population that composes the great Belém. To the long one of the time, the Island of the Mosqueiro was scene of many landscapes transformations. The performance of litologics, pedologics local factors as to those of order, of relief and, more recently, antropics, is used to explain the current arrangement of the landscape. In this direction the ecology of the landscape is presented as important boarding integrator for the search for the agreement of the Neogenic evolution. Inside of the flowing varied ones of studies on the shaped one of the landscape, it was opted to multitemporaly evaluating the evolution of the systems natural and constructed (landscape diversity), as well as the unknown application of metric of the landscape quantifying the current landscape situation and its possible future ambient impacts, ahead of the current strategies of occupation. Moreover, it searched integration of different variable as the ground, geology, geomorphology, neotectonic and the vegetal covering and use of the land of the Island of the Mosqueiro, for the attainment of the vulnerable areas the processes that are inserted in the dynamics of the same one, the example of the erosion. Thus, in the conduction of this research in the Island of the Mosqueiro the application sources had involved: geoprocessing; digital processing of images; metric of the landscape; and statistics and algebra of maps. The primordial data to this work had been: images of the Landsat satellite; deriving cartographic products of the aerophotogrammetry survey of Belém-PA; map of detailed ground survey; geology map; and information collected in field. The applicatory ones used for the attainment of the results had been the following ones: SPRING (version 4.0/Windows); ARCVIEW (version 3.3/Windows); SURFER (version 8.0); and FRAGSTATS (version 3.0). Amongst the main results reached in the study of the landscape of the Island of the Mosqueiro, they are distinguished: maps that portray the occupation dynamics (multitemporal analysis); space analysis of the current landscape structure (application of metric of the landscape); evaluation of geomorphology changes; framework current of the tectonic regimen (tectonics imperfections); and, finally, the map of vulnerability to the erosion.Item Acesso aberto (Open Access) Evolução morfotectônica e ecologia da paisagem na região da Orinôquia Colombiana(Universidade Federal do Pará, 2000-07-20) CASTRO, Beatriz Jimenez; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228Item Acesso aberto (Open Access) Geologia do perfil entre os municípios de Colina e Couto Magalhães no estado do Tocantins-Brasil(Universidade Federal do Pará, 1997-02-18) MORAES JÚNIOR, Ofir; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228; GÓES, Ana Maria; http://lattes.cnpq.br/2220793632946285The area is part of the geological framework of the Tocantins Province, within the southernmost portion of the eastern Amazon. It is comprised between the parallels 08° 00' 00'' and 08° 30' 00'' and the meridians 48° 30' 00'' and 49° 30' 00''. The researched region encompasses a geological section that has insertion in the city of Colinas do Tocantins, continuing through the state highway TO-280 and ending in the vicinity of the city of Couto Magalhães/TO, making up about 107 km in profile. The chronostratigraphic division for the Baixo Araguaia Supergroup is adopted in this work, which includes, from base to top, the Estrondo and Pequizeiro groups. It was decided to include in the Estrondo Group the lithotypes attributed to the Xambioá Formation (in addition to the inclusion, in this group, of the Couto Magalhães Formation). This unit, in its eastern portion, is predominantly constituted by schists and quartzites, being more common biotite schists, feldspathic schists (gneissoids) and pure quartzites; in its western portion, outcrops the unit called, by some authors, the Couto Magalhães Formation, whose main lithology is represented by metasediments, predominantly phyllites. The Pequizeiro Group, in some works called the Pequizeiro Formation (included in the former Tocantins Group), is located in the central-west part of the area and requires rocks fundamentally formed by mica schists, with more frequent chlorite schists and interspersed biotite schists. The Parnaíba basin is represented at its western edge (eastern portion of the work area) by pelitic sediments from the Pimenteira Formation and sandstones from the Cabeças Formation. Essentially conglomeratic units attributed to the Rio das Barreiras Formation and to the Cipó Conglomerate unit were also observed, which, by some authors, have been considered as depositional variations of the Cabeças Formation, or the Piauí Formation or even the Pedra de Fogo Formation. These conglomerates are considered here to be of Eopaleozoic age. The sedimentological characteristics of the Rio das Barreiras Formation do not allow to correlate it with any unit of the Parnaíba basin; the Cipó Conglomerates may be related to the Serra Grande Formation of this basin. The structural features identified within the Baixo Araguaia Supergroup segregate not only two lithostratigraphic groups bundled in the Estrondo and Pequizeiro groups, but also two classes of structures: one originated by a purely ductile and non-coaxial tectonic system; and another coming from a predominantly brittle and coaxial tectonic, implanted later. They are marked by the constant presence of three most important types of tectogenous structures: [a] mylonitic foliation and schistosity; [b] stretch lineation; in addition to a third structure identified punctually; [c] compositional banding. Other not less important features are described as folds, crenulation cleavage, veins and lenses. Within the domain of brittle structures, failures of different types, joints or fractures are recognized, in addition to the lineament of various orientations that can represent different types of structures. The structures identified within the Parnaíba basin are fundamentally characterized through the action of processes originated by faults of a normal nature. They are structures originating from a fragile tectonic regime that generated important normal faults, both on a regional scale and on an outcrop scale. Of equal importance are the discontinuities described as joints that constitute striking impressions recorded in the two sedimentary units mapped within this portion of the basin. The correlation between the features displayed on the outcrop scale (faults, fractures, striations) with the regional scale lineaments shows the main direction according to a preferential north-south direction. This orientation can be visualized through the records (diagrams) of statistical treatments based on field measurements. The glaciotectonic structures studied refer to the deformed and chaotic geometries existing in the Devonian conglomeratic sand deposits belonging to the Cabeças Formation of the Parnaíba basin. They occur in much of the work area, along the easternmost portion of the region. They are mainly tillites that exhibit exuberant shear features, attributed to the tectonism of paleoglaciers at the end of the marine sedimentation of the Cabeças sandstones, in the Famenian. Deformed and slightly deformed tillites originated in a progressive deformation regime through tangential movements in simple and heterogeneous shear zones, generated in distal subglacial and glacial contact environments, are described. Two main relief compartments are exposed within the work area: [1] the one attributed to the Araguaia belt and [2] the one correlated to the sedimentary cover of the Parnaíba basin. Within the scope of the Araguaia belt, which is part of the Planalto do Interfluvio Araguaia-Tocantins, the following differentiated relief units were identified: [a] relief of aligned mountain ranges with sharp tops; [b] relief of hills with tabular tops; [c] relief of isolated hills with domed tops; [d] hilly relief with rounded tops; [and] tertiary plan; [f] fluvial plain of the Araguaia River; [g] Holocene alluvium. The last two sub-units are located in the Araguaia Depression. In the area belonging to the Parnaíba basin, included in the Depression of Tocantins, only two morphological units were identified; [h] relief of flat-topped hills; [i] relief of broad hills with flat and rounded tops. The evolution of the area in the context of the Araguaia belt is understood through the lithospheric distension-compression model, where the distensive phase promoted the formation of hemigraben dominated by normal faults inclined to the east; the compressive phase was characterized by the reactivation of normal thrust faults. The accommodation of these tensors took place through the formation of an imbricated system with associated nappes. The Baixo Araguaia Supergroup has transgressive marine sequence characteristics. The installation of the Parnaíba basin occurred through a NW-SE extension axis during the early Paleozoic, in the Ordoviciian-Silurian. The effects of this opening led to the formation of extensional faults that were concentrated on the W, E and SE edges that were controlled by ancient Precambrian lineaments. The clastic deposits of the Canindé Group, records of the Devonian of the basin, represent the alternation of regressive cycles (pelites of the Pimenteira and Longá formations) and transgressive (sandstones of the Itaim and Cabeças formations) and are characterized by deposition in temperate to cold climates near glaciers.Item Acesso aberto (Open Access) Implantação de rotinas de criação de modelos digitais de terreno e visualização científica em PC's e estações gráficas Unix (Sistema solaris), exemplo da folha Bauru (SF-22-Z-B) estado de São Paulo(Universidade Federal do Pará, 2003-07-07) FELIPE, Leonardo Brasil; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228Item Acesso aberto (Open Access) Neotectônica na área do Tiracambú (NE do Estado do Pará, NW do Estado do Maranhão)(Universidade Federal do Pará, 2000-06-13) CAVALCANTE, Luciana Mendes; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228Item Acesso aberto (Open Access) Virtualização da paisagem de bacias hidrográficas da zona de expansão urbana do município de Belém-PA por meio de cartografias temáticas digitais(Universidade Federal do Pará, 2005-07-04) OLIVEIRA, Ricardo Alexandre Fialho de; BORGES, Maurício da Silva; http://lattes.cnpq.br/1580207189205228The municipality of Belém (PA), located in the northeast region of the State of Pará, is characterized by having a geographical position close to the Atlantic Ocean, flat relief, low altitudes and typical climate of the Amazon (hot and rainy) where high rainfall prevails. (2,600 to 3,300 mm/year), conditioning the formation of the landscape. And this landscape is carved in rocks of the Barreiras formation and in Post-Barreiras sediments, being conditioned to neotectonic transcurrent processes, evidenced by two large groups of faults on the macroscopic scale, which cut the Tertiary and Quaternary sediments. One beam is presented with direction N05E and N60E, the other beam with direction N45-55W. These faults produce “micro-reliefs”, topics of Amazonian cities, which are often imperceptible, are important when interacting with hydrological, neotectonic and territorial occupation and space management processes. The association and/or interaction of these factors, or some of them, are the main responsible for several problems observed in Belém, regarding the use and occupation of the physical environment in the Urban Expansion Zones (ZEU) of the municipality of Belém. In this work, the landscape structure and its spatial pattern are virtualized in the Paracuri, Curuperé and Tamanduá river basins, located in urban expansion areas of the municipality of Belém, through digital thematic cartographies derived from Numerical Land Models (MNT). ). The generation of such cartographies made it possible to extract information associated with physiographic aspects and processes (natural and artificial) responsible for surface modeling in hydrographic basins. Because the three-dimensional representation of space, using geoprocessing techniques, acquires fundamental importance, when associated with applications aimed at the use and occupation of the physical environment in urban spaces of large cities, constituting valuable information for future works involving environmental aspects. , geotechnical and planning of use and occupation of the physical environment in hydrographic basins. And the integrated use of MNT's with other types of data, expanded the knowledge about the reality of the landscape, allowing to visualize the phenomena resulting from natural and anthropic interventions on the urban space, and to submit such models to evaluation.