FCT - Faculdade de Ciências e Tecnologia

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Ações na escola para educação e segurança no trânsito
(Universidade Federal de Goiás, 2021) Santos (org.), Alex Mota dos
Análise do tema economia solidária nas produções dos programas de pós-graduação em Geografia
(2015-07) Severino, Maico Roris; Barbosa, Janete Costa Ribeiro; Ribeiro, Marina Pires
The Solidarity Economy experiences have grown exponentially in Brazil since the start of the 21st century. To that extent, the various areas of knowledge have been developing studies to better understand this phenomenon, among them, Geography. The purpose of this paper is, therefore, to perform a quantitative and qualitative analysis of graduate programs productions (theses and dissertations) on geography and the solidarity economy topic. Hence, a literature review was conducted in order to gather all theses and dissertations up to the year of 2014, that addressed the topic. It was perceived that the geography research on the topic is still limited and regionally concentrated, but on the other hand, the studies analyzed show interesting analysis and broad scopes. The main contribution of this paper is the diagnosis of how the solidarity economy theme has been studied in geography, as well as to point out other research opportunities.
Avaliação do ganho ambiental com o uso da bicicleta de carga na última milha - uma revisão sistemática da literatura
(Universidade Federal de Goiás, 2023-09-22) Oliveira, Fernando Soares Ribeiro de; Guerrero, Cintia Isabel de Campos Roque; Andrade, Carlos Eduardo Sanches de; Andrade, Carlos Eduardo Sanches de; Souza, Alessandro de Santana Moreira de
The continuous growth of cities entails the demand for the use of means of transport, both for passengers and cargo. In the last mile, conventional means of transport are used, which consume fossil fuels, but more and more people are looking for other transport alternatives that live better with the environment. An example is the transport by bicycles and cargo tricycles, which can be used as sustainable alternatives for transporting cargo in the last mile. This work aimed to apply a Systematic Literature Review on using these vehicles in the last mile to evaluate the environmental gain obtained. The PRISMA methodology was used, and it led to quantitative and qualitative results relevant to the theme. Ten published articles were selected, seeking to obtain the state of the art of these sustainable transport alternatives worldwide. The results showed that the use of bicycles and tricycles is successfully applied to small and medium-sized goods, food products, pharmaceuticals, and documents, among others, and has significantly contributed to the reduction of congestion, CO2, traffic accidents, and local pollutants, increasing the quality of life in cities. An analysis of the results and its application in Brazil was carried out, where the potential for use was found, but in need of improvements in cycle paths and implementation of pilot projects.
Correlações entre transporte e desenvolvimento econômico aplicadas ao turismo: uma análise a partir do município de Caldas Novas/Go - Brasil
(2017-12) Perim, Thiago Marcell Pires; Caetano, Mauro; Costa, Sérgio Henrique Barroca; Pimenta, Daiana Paula; Almeida, Cristiano Farias
Understanding the elements that potentiate the economic development of a certain locality becomes necessary in the managerial sciences and planning of touristic destinations. Collaborating with theoretical gaps related to the particular analysis of transport activities and their impact on tourism, this study seeks to identify the economic relations between tourism and road transportation of people in tourist cities, being adopted as a reference the case of Caldas Novas / Goiás / Brazil, one of the main tourist destinations in the country. From the use of economic data and the characteristic of people transportation, statistical models has been used to analyze, for example, the impact of the increase of vehicles to public transport at the gross domestic product of the municipality, demonstrating the levels of impact between the variables considered. Such results can be used to manage the transport activities and for the planning of tourism.
Exploring the relationship between transportation infrastructure and regional economic growth using Losch’s location theory
(2021-05-14) Almeida, Cristiano Farias; Silva, Francisco Gildemir Ferreira da; Araujo, Paulo Henrique Cirino
There are some knowledge gaps regarding the relationship between transportation infrastructure and economic development, especially about economic impacts that occur due to implementation of infrastructure in a given region, albeit various studies have addressed the issue. This paper aims to identify variables that affect economic development in order to contribute to the development of a theoretical model that could explain the relationship between transportation infrastructure and economic development. The theoretical model is satisfactory because it begins by analyzing the actions generated by the transportation infrastructure. Moreover, the model is based on the Location Theory considering the economic development and taking into account variables such as transportation costs, gain, product value, consumption, competition between companies and lastly monopoly. Finally, an econometric procedure, Spatial Panel Auto Regressive Vector Model (PVAR), was used to evaluate the relationship between economic development and investments in transportation infrastructure.
Guidelines to devise a multimodal freight transportation network in developing regions under economic growth approach
(2014-12) Almeida, Cristiano Farias; Gularte, Juliana Gomes; Yamashita, Yaeko
In Brazil, especially at the Amazon Region, the relationship between transport and economic development has been studied since 70s with elaboration of several plans. However, due to many factors, such as the incompatibility between the proposed models of transport planning and territorial planning, the expected results were not reached. Under these aspects, the goal of this paper is to define guidelines in order to devise a multimodal freight transportation network that allows efficient transport of products in a developing region. This network was developed using natural resources and it stimulates the economic growth and development based on the Growth and Development Poles Theory and Graphs Theory. As result three networks related to three different scenarios – status quo, investment in transport infrastructure by the governmental programs, and the strategy scenario – have been elaborated and analyzed considering the operational transport costs and their spatial configuration.
Identification of development poles on Brazilian Amazon region and analysis of the geographic accessibility
(2020-10) Santos, Alex Mota dos; Almeida, Cristiano Farias; Soares, Daniel de Oliveira; Silva, Carlos Fabricio Assunção da
Identification of development poles within the regional planning is important for defining the nodes of a given transport network and plays the role of driving economic growth in a region. Nevertheless, such proceedings are complex, especially in some areas where there is a lack of data that could support studies of this nature, for example in the case of the Amazon region. Thus, this study aims to identify development poles using spatial analysis of production values of soya, coffee, wood, and mineral products like cassiterite, aluminum ore, iron ore and copper. In addition, the geographic accessibility analysis was carried out at these poles in order to identify the potential of the transport network to be structured. Results demonstrated that it is possible to build a dense transport network by identifying more development poles, which would increase the connectivity, allowing more intense exchange of flows and development of the region.
Isótopos estáveis (C, O, S) e geoquímica de rocha total de carbonatitos da província Ígnea Alto Paranaíba – SE Brasil
(2016-09) Gomide, Caroline Siqueira; Brod, José Affonso; Vieira, Lucieth Cruz; Junqueira-Brod, Tereza Cristina; Petrinovic, Ivan Alejandro; Santos, Roberto Ventura; Barbosa, Elisa Soares Rocha; Mancini, Luis Henrique
The present work investigates the relationship between whole-rock geochemistry and stable isotope composition from carbonatites belonging to the Tapira, Araxá, Salitre, Serra Negra, Catalão I, and Catalão II alkaline-carbonatite complexes of the Alto Paranaiba Igneous Province (APIP), central Brazil and from the Jacupiranga Complex, of the Ponta Grossa Province, southeast Brazil. The APIP complexes are ultrapotassic, comprising bebedourites, phoscorites, nelsonites, and carbonatites, whereas Jacupiranga is a sodic complex composed of ijolite-series rocks, syenites, carbonatites, and alkaline gabbros. The geochemistry data allied to mineralogical constraints allowed us to classify the carbonatites into five groups, and to devise a chemical index (BaO/(BaO+SrO)) to gauge the magmatic evolution of the studied carbonatites.The APIP carbonatites evolve from apatite-rich calciocarbonatites toward Ba-, Sr-, and rare earth element (REE)-rich magnesiocarbonatites. This evolution is mostly driven by apatite, phlogopite, dolomite, and calcite fractionation and consequent enrichment in monazite, norsethite, and strontianite. Stable isotope data show a wide diversity of petrogenetic processes in play at the APIP, relatively to the Jacupiranga Complex, which is interpreted as a result of the shallower intrusion levels of the APIP complexes. Such shallower emplacement, at low lithostatic pressure, allowed for a complex interplay of fractional crystallization, liquid immiscibility, degassing, and interaction with hydrothermal and carbohydrothermal systems.
Mapeamento geológico 1:5.000 e caracterização litogeoquímica para remineralizadores na região de Nazário-GO
(Universidade Federal de Goiás, 2024-07-30) Silva, Guilherme Fellype Xavier; Temporim, Filipe Altoé; Nascimento, Estela Leal Chagas do; Nascimento, Estela Leal Chagas do; Reis, Mateus Andrade; Martins, Éder de Souza
The intensive use of highly soluble chemical fertilizers (NPK) causes significant environmental impacts, proving the need to seek new alternatives to nourish the soil in less aggressive ways to the ecosystem. The use of rock dust to replenish nutrients to the substrate, known as rock dusting, is a technique that has stood out in recent years as a sustainable alternative to achieve this purpose. It can also be an option for properly disposing of mining waste. Normative Instruction No. 5 of March 10, 2016, from the Ministry of Agriculture, Livestock, and Supply (MAPA) stipulates that rocks efficient in replenishing nutrients to the substrate must meet certain criteria established by the agency. In recent years, the state of Goiás has become extremely relevant in the production of remineralizers. Keeping this in mind, DECAL – Derivados de Calcários Ltda contracted the services of Vila Rica Consultoria Mineral e Ambiental Ltda to conduct mineral research in the region of Nazário-GO, aiming to evaluate the potential of the region for the creation of a remineralizer product. The work includes field mapping, optical microscopy, chemical analyses using ICP-MS/OES (Inductively Coupled Plasma Mass Spectrometry), XRF (X-Ray Fluorescence), and SEM-EDS (Scanning Electron Microscopy with Energy Dispersive Spectroscopy) to perform quantitative and qualitative analysis of the lithologies of interest and studies of potentially toxic elements. As a complement to the field mapping, a geophysical survey of magnetic susceptibility was carried out to delineate and obtain more information about the geology of the work area. Based on the chemical analyses of the selected lithotypes, theoretical simulations were conducted to create a remineralizer compound composed of a blend of rock dust from various lithologies.
Mapeamento geológico da região das nascentes do Rio Vermelho e arredores no município de Goiás (GO) em escala 1:20.000
(Universidade Federal de Goiás, 2023-08-29) Gomes, Camila de Sousa; Altoé, Elisandro Seraco; Macedo, Sarah Karoline Costa; Rodrigues, Sérgio Wilians de Oliveira; Rodrigues, Sérgio Wilians de Oliveira; Lima, Martha Noélia; Carneiro, Jônatas de Sales Macedo
The present work consists of a detailed geological mapping study in the region of the headwaters of the Vermelho River and adjacent areas in the municipality of Goiás (GO), carried out at a scale of 1:20,000. The main objective of the study was to analyze and describe the geological characteristics of the region, aiming to understand its geological and structural evolution. The adopted methodology involved fieldwork, analysis of collected data, such as direct observations of rocks and geological structures, as well as the collection of samples for petrographic and geochemical analysis. Additionally, geophysical data and topographical survey information were used to assist in the interpretation of geological features. Fourteen lithological units and alluvial cover were identified. These units were placed in the context of existing literature. Petrographic analyses allowed the characterization of rocks in terms of mineralogy and texture, contributing to the interpretation of formation and metamorphic conditions. Geochemical analyses aided in understanding the chemical characteristics of the rocks, providing insights into the provenance of the rocks and associated geological processes. This geological mapping study provides important insights into the geology of the study area, such as the relationships between the mafic-ultramafic rocks of the Goiás Velho Group and the Caiçara Complex, and between these rocks and the Serra Dourada Group. The findings are relevant not only for understanding the local geological evolution but also for comprehending geological phenomena in broader contexts. Furthermore, the mapping serves as instrumental material for Ediminas Mineração Ltda, providing support in the context of their mineral exploration activities.
Mapeamento geológico em escala de semidetalhe (1:50.000) na porção sudeste do município de Campinaçu – GO
(Universidade Federal de Goiás, 2024-07-31) Rocha, Eric Gonzaga; Secco, Henrique Pereira; Temporim, Filipe Altoé; Reis, Mateus Andrade; Reis, Mateus Andrade; Rodrigues, Sérgio Wilians de Oliveira; Cavalcanti, Débora Ezequiel
The municipality of Campinaçu has economic potential related to various mineral deposits, with emphasis on gold, a mineral that has a history of mining in the Serra Grande region, popularly known as Serra do Buracão. The mapping area is located in the inner zone of the Brasília Belt, more specifically in the Serra da Mesa Group. Geological mapping in the region of interest used geoprocessing, photogeology, field mapping and sampling, scouting campaigns, petrographic and petrological analyzes to create a geological map at a scale of 1:50,000. After mapping, three main lithostratigraphic units were delimited, namely: Garnet shale-mica schist, composed of garnet-biotite-sericite schist, biotite-sericite schist, biotite-muscovite schist, a faciological variation with the presence of carbonaceous shale schist lenses; Quartzite, consisting of muscovite quartzite with centimeter lenses of mica schist; Mica schist with lenses of fine quartzite and calcschist. With the delimitation of lithological contacts, it was possible to generate a stratigraphic column for the area. The structural features mapped are the result of 4 (four) deformational events (D1, D2, D3 and D4), related to tectonic events west of the Rio Maranhão System, where the deformation of the Serra da Mesa rocks is polyphasic. These events were responsible for the generation of schistosities, spaced cleavage and crenulation, veins and folds. The economic potential of the region is related to gold mineralization, which may have generated a phylonian gold deposit in detrital metasediments, where milky quartz veins larger than 50cm, discordant with the foliations, have the potential to host free gold. The veins occur both north and south of Serra do Buracão, in addition to its crest, evidenced by isotheor maps of the distribution of this element. These veins are oriented in the NNE-SSW and W-E directions, associated with the D3 event. Chemical analysis showed a positive correlation between gold and elements such as lithium, lead, titanium, sulfur, zinc and zirconium.
Mapeamento geológico integrado 1:50.000 da região da Serra da Jiboia (GO) - área 1
(Universidade Federal de Goiás, 2023-02-15) Coutinho, Nathália Amaral; Maciel, Victor Augusto Silva; Nascimento, Estela Leal Chagas do; Lopes, Débora Nogueira; Lopes, Débora Nogueira; Santos, Marcelo Henrique Leão; Siepierski, Lincoln
This paper presents the results obtained from the 1:50000 mapping of the Serra da Jiboia region. The detailing of the geological units was possible with the conciliation of bibliographical survey, photointerpretation, geophysical, geochemical, and geoenvironmental, lithological and structural data obtained in the field. As a result, the following mapped units were detailed in the context of the Brasília Belt brim and the Goiás Magmatic Arc (AMG): Anicuns-Itaberaí Metavolcanosedimentary Sequence (SAI), Campestre Gnaissic-Migmatitic Complex, Santa Bárbara Complex and the Creoulos Granodiorite. The SAI is characterized in forearc basin associated with an island arc system, recorded by platform sedimentation in the rhythmic-carbonate unit and marine regression depositional in the psamo-pelitic unit. The Creoulos granodiorite records syncolonal magmatism of meta to peraluminous granites. The geological evolution is marked in the Brasiliano, responsible for the opening of the Goiás Ocean and later the closure. This phase concludes the formation of island arcs and the Brasília orogen. The deformation of the rocks is represented by east-west compression that resulted in isoclinal thrust folds with N-S axis and eastward vergence with higher temperature and pressures. Conjugate fracture systems occur, with E-W and NE-SW direction that, by progressive deformation, originate NS, NW and NE transcurrent shear zones. The observed metamorphism of the rocks is a variation of high greenish schist to amphibolite facies, associated to SAI, besides hydrothermal metamorphism linked to shear zones. The area presents some economic aspects, with potential for manganese, calcitic marble and remineralizers for agriculture and gravel and sand for civil construction.
Mapeamento geológico integrado 1:50.000 da região da Serra da Jiboia (GO) - área 2
(Universidade Federal de Goiás, 2023-02-16) Nadote, Hianna Carvalho; Cardoso, Sara Vieira; Lopes, Débora Nogueira; Nascimento, Estela Leal Chagas do; Nascimento, Estela Leal Chagas do; Paixão, Marco Antônio Pires; Chagas, Daniel Bezerra das
This work begins through the processing and interpretation of image data, geophysical, geochemical, mineral resources and environmental data and following data collect of lithological, structural, environmental and mineral occurrence in field. The geological mapping in the Serra da Jiboia (GO) region intend to describe and interpretate the units Anicuns-Itaberaí Sequence, Gnaíssico-Migmatítico Complex and Santa Bárbara Body. The first fase of deformation is associated to the S1 foliation, to the intrafolial folds and quartz veins, the phase 2 is characterized for the shale which is well preserved in all area and associate with the assimetric isoclinal regional fold of the Serra da Jiboia. The third phase also receive emphasis by the extensive shear zone which occurs in the Santa Bárbara Body limits, this compressive deformational fase also occurs crossing folds. The fase 4 distinguishes for the crenulations and spaced cleavage. The potential economy of the area is diverse and with emphasis on clay and gravel occurrences.
Mapeamento geológico integrado 1:50.000 da região da Serra da Jiboia (GO) - área 3
(Universidade Federal de Goiás, 2023-02-14) Silva, Gabriela Soares Freitas e; Silva, Michele Urbano da; Reis, Mateus Andrade; Reis, Mateus Andrade; Heringer, Rodrigo de Almeida; Lima, Martha Noélia
The area of study is located in the southeast portion of the state of Goiás, next to the municipalities of Nazário and Anicuns. It is geologically located in the context of the Goiás Magmatic Arc (AMG), which is composed by rocks that register the complex metamorphic and structural geotectonic development, associated with the Brasiliano orogenesis (Arquean-Neoproterozoic), developed mainly during the structuring of the Brasília Belt. The integrated geological mapping aimed to map the different lithofacies associated with the outcropping units, namely: Anicuns Itaberaí Metavolcanosedimentary Sequence, Anápolis Itauçu Granulitic Complex, Campestre Gneiss Migmatitic Complex, Anicuns-Santa Bárbara Suite, Creole Granite and undifferentiated granitic intrusions. The work was carried out from the processing and interpretation of photointerpretive, geophysical, geochemical and geoenvironmental data, as well as lithological and structural data collected in the fieldwork, generating geological, structural and point maps as final products. The rocks exhibit metamorphism from greenschist facies to the amphibolite-granulite transition. Four deformational phases were identified: D1 generated a main E-W compression, marked by isoclinal folds with NS axes, which folded S0 and originated the S1 foliation; D2 represents the continuity of compression, generating parasitic folds and S2 foliation; D3 represents the formation of NW-SE shear zones and thrust faults, associated with the continuity of E-W compression; D4 reflects the decrease in compression, generating S3 foliation. The area presents occurrences of minerals used in civil engineering and industry.
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).
Mapeamento geológico-ambiental, em escala 1:25.000, de área adjacente ao reservatório do ribeirão João Leite, região metropolitana de Goiânia - Goiás
(Universidade Federal de Goiás, 2022-10-08) Álvares, Amanda Pereira; Silva, Ariele Lisita; Silva, Icaro Souza; Canile, Fernanda Maciel; Canile, Fernanda Maciel; Nogueira Neto, José de Araújo; Trindade Netto, Gil Barreto
The area under study comprises a peri-urban strip, located in the northwest region of the municipality of Goiânia, capital of the state of Goiás, which is part of the rural macro-zone of João Leite, an area destined for the preservation and sustainable use of its resources, under the influence of the Área de Preservação Permanente de João Leite (APAJoL). It is inserted in the geological context of the Anápolis-Itauçu Complex, belonging to the Brasília Belt, formed during the Brasiliana Orogeny in the Neoproterozoic. The objective of this work was to carry out an integrated mapping, in which the main aspects of the physical environment are related to geoenvironmental characteristics, based on the analysis of variables such as hypsometry, slope, drainage density, soil use and occupation, erosive susceptibilit, structural surveys, among others. Furthermore, in the area, four lithotypes belonging to the Anápolis-Itauçu Complex were characterized: i) garnet-hornblende-clinopyroxene-plagioclase granulite; ii) hypersthene gneiss, with presence of hornblende; iii) tremolithites, indicative of metasomatism; vi) quartzite metasedimentary sequence. The results obtained suggest that it is necessary to adopt inspection measures and control the advance of areas for agricultural purposes, implementation of allotments and residential condominiums that increase the deforestation of the Cerrado and cause erosion that cause silting and pollution of the rivers that supply the city.
Mapeamento geológico-estrutural e estudo do potencial exploratório de mineralizações auríferas em metadolomitos da área adjacente a unidade Mineração Serra Grande, município de Crixás (GO)
(Universidade Federal de Goiás, 2024-05-03) Santos, Karina Louanny de Paula; Souza, Lauriana Vitória Gonçalves; Machado, Victtor Gabriell de Lima; Melo, Rodrigo Prudente de; Rodrigues, Sérgio Wilians de Oliveira; Rodrigues, Sérgio Wilians de Oliveira; Melo, Rodrigo Prudente de; Schroeder, James; Nogueira Neto, José de Araújo
The mineral deposits of the Crixás Greenstone belt (GBC) are inserted in the context of the Goiás Granite-Greenstone belts Terranes and comprise one of the largest gold reserves in Brazil. The ore bodies explored in Mineração Serra Grande (MSG) unit encompass several lithotypes with mineralization hosted in zones closely related to structural and hydrothermalized domains. The gold mineralizations hosted in Structure IV metadolomites of the Ribeirão das Antas Formation are one of the main challenges of the operation, due to the complexity of the mineralization model, which is still unexplored in calciosilicate rocks from Greenstone belt environments. This work aimed at geological-structural mapping on a 1:15,000 scale of an area of approximately 27 km2 located on the western and southern margins of the Serra Grande Mining site, the study of exploratory potential for the metadolomites of the Ribeirão das Antas Formation was also commented, especially for the layers that are expoused on surface to the south of the mapped area. Three deformational events were identified in the area: D0+D1, D2 and D3 which correspond, respectively, to S0//S1, referring to the primary bedding parallel to the schistosity generated by an E-W compression; S2, referring to a schistosity generated by the thrusting of the Mara Rosa Magmatic Arc at north of the GBC; and S3, which summarizes an E-W compression reported in crenulation cleavages. Field data obtained from surface, mine mapping and description of drilling cores integrated with three-dimensional geological models were used to evaluate the exploratory potential of the metadolomite bodies outcropping in the southern portion of the MSG and their relationship with the mineralized structures in other areas of the deposit. The product generated in this work aims to expand knowledge of the geometry and spatiality of these lithologies in order to facilitate and reduce initial costs of advanced drilling campaigns in the area, in addition to proposing a model of interaction between the gold mineralizations of these layers and the explored structures in MSG.
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.
Metamorfismo da sequência Anicuns-Itaberaí na região de Nazário-GO
(Universidade Federal de Goiás, 2024-07-22) Brod, Gabriel Silveira; Vieira, Otávio Passo; Melo, Rodrigo Prudente de; Temporim, Filipe Altoé; Temporim, Filipe Altoé; Cavalcanti, Débora Ezequiel; Grella, João Victor
The Anicuns-Itaberaí Sequence is one of the metavolcanosedimentary sequences that make up the Arenópolis Magmatic Arc. However, even with the abundance of research found in the literature related to geochemical, isotopic and geochronological aspects, there is still little material on petrology and structural geology with a focus on the metamorphic evolution of these rocks, which makes the tectono-metamorphic evolution of these sequences still poorly understood. This work aimed to establish, through geological mapping, structural interpretation and petrological studies, a greater understanding of the metamorphic conditions (P-T) that the rocks of the Anicuns-Itaberaí Sequence were subjected to during the metamorphic evolution of the Brasília belt. The results of this work include geological mapping on a scale of 1:50,000 of the region bordering the municipalities of Anicuns, Avelinópolis, Nazário and Palmeiras de Goiás. It also includes the integration of structural, microstructural and petrological data, and the creation of compositional maps of two samples of garnet-chlorite-biotite-muscovite schist from the area that were made using XMapTools software from electron microprobe data. The mineral assemblage of these rocks, given by garnet + plagioclase + biotite + muscovite + quartz + chlorite, was modeled geothermobarometrically using the Bingo-Antidote extension. The modeling results suggest that the metamorphic peak occurred in amphibolite facies conditions (staurolite zone), with retrometamorphism during crustal exhumation to green schist facies conditions. The results show small differences in values between the samples. In sample 23GO_022-P1 the conditions obtained were 630.9 °C and 1.007 GPa for the peak of metamorphism and 536.6 °C and 0.588 GPa for retrometamorphism, while for sample 23GO_025-T1 the conditions were 654.2 °C and 1.198 GPa for the metamorphic peak and 569.9 °C and 0.703 GPa for retrometamorphism. These values indicate that, although there is a small difference between the P-T results between the two samples, the P-T amplitude between the metamorphic peak and the retrometamorphism are very similar for the two samples, which suggests that these differences may be related to different levels of burial between the two samples during the metamorphic process. Finally, it should be emphasized that the data presented in this work provides new information on the geological evolution of these rocks and also shows the need for more studies of this type in the area, including geochronological data on metamorphic rocks in order to better understand the relationship between metamorphism and the tectonic events that affected the region.
Methodology focused on identifying variables necessary to develop logistics clusters
(2021-04-29) Almeida, Cristiano Farias; Yamashita, Yaeko; Cools, Mario; Marchal, Jean; Piette, Bernard

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