scholarly journals ASPECTOS LEGAIS DA SEGURANÇA DE BARRAGENS DE REJEITO DE MINÉRIO: IMPLICAÇÕES PARA A QUALIDADE AMBIENTAL E USOS MÚLTIPLOS DA ÁGUA NO ALTO RIO DAS VELHAS (MG)

GEOgraphia ◽  
2019 ◽  
Vol 21 (45) ◽  
pp. 32
Author(s):  
Guilherme Eduardo Macedo Cota ◽  
Nayara Mariana Gonzaga Rosa ◽  
Camila Esteves Romeiro ◽  
Izabela Aparecida da Silva Mendes ◽  
Antônio Pereira Magalhães Júnior
Keyword(s):  
Environmental Quality ◽  
National Policy ◽  
Legal Aspects ◽  
Minas Gerais ◽  
Environmental Risks ◽  
Mining Tailings ◽  
Tailings Dams ◽  
Iron Quadrangle ◽  
Quadrilátero Ferrífero ◽  
Minas Gerais State

: A construção de barramentos para a contenção de rejeitos provenientes da exploração mineral é uma prática comum em Minas Gerais, principalmente no Quadrilátero Ferrífero. Os riscos ambientais associados ao colapso destas estruturas favoreceram a elaboração de parâmetros legais que regulam as barragens de rejeito de minério no Brasil, estabelecidos através da Política Nacional de Segurança de Barragens e do Sistema Nacional de Informações sobre Segurança de Barragens. A bacia do Alto Rio das Velhas está totalmente inserida no Quadrilátero Ferrífero, onde a mineração se sobressai em diferentes contextos de uso e ocupação do solo no entorno dos cursos d’água. Deste modo, destaca-se a importância da realização de estudos que abordem os aspectos e instrumentos legais tocantes à segurança de barragens de rejeitos, fomentando reflexões acerca das implicações e dos riscos inerentes à instalação e à manutenção deste tipo de estrutura na região. Neste sentido, este artigo apresenta um panorama dos aspectos jurídicos, legais e administrativos que envolvem a segurança de barragens de rejeito de minério instaladas na região do Alto Rio das Velhas e faz uma reflexão sobre o seu contexto espacial, apontando os problemas, riscos e consequências para a qualidade ambiental e a manutenção de usos múltiplos da água na bacia.Palavras-chave: Mineração. Riscos ambientais. Quadrilátero Ferrífero. LEGAL ASPECTS ON SAFETY OF MINING REJECT DAMS: IMPLICATIONS FOR AN ENVIRONMENTAL QUALITY AND MULTIPLE WATER USES IN THE UPPER RIO DAS VELHAS BASIN (MINAS GERAIS STATE, BRAZIL)Abstract: The construction of dams to store and contain mineral tailings is a common practice in the Minas Gerais state, Brazil, mainly in the so-called “Quadrilátero Ferrífero” geological region (iron quadrangle). The environmental risks associated with the collapse of these structures favored the elaboration of legal parameters that regulate this sector in Brazil. These parameters are established through the national policy on dam’s safety and the national information system on dam’s safety. The Alto Rio das Velhas basin is totally inserted in the “Quadrilátero Ferrífero”, where mining excels in different contexts of land use and occupation around the water courses. Therefore, it is important to carry out studies that address the legal aspects and instruments related to the safety of mining tailings dams, motivating reflections about the implications and risks inherent to the their installation and maintenance in the region. In this sense, this article presents an overview of the juridical, legal and administrative aspects that involve the safety of mining tailings dams installed in the region and reflects on their spatial context, pointing out the problems, risks and consequences for environmental quality around maintaining commitment of water multiple uses in the basin.Keywords: Mining. Environmental risks. “Quadrilátero Ferrífero” (iron quadrangle).

scholarly journals Panorama das barragens de rejeito de minério no Quadrilátero Ferrífero (MG) e suas implicações para a segurança hídrica da Região Metropolitana de Belo Horizonte-MG

GeoTextos ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Guilherme Eduardo Macedo Cota ◽  
Antônio Pereira Magalhães Júnior
Keyword(s):  
Water Security ◽  
Legal Aspects ◽  
Metropolitan Region ◽  
Tailings Dams ◽  
Quality Of Water ◽  
Iron Quadrangle ◽  
Quadrilátero Ferrífero ◽  
Minas Gerais State ◽  
Belo Horizonte

<p>O presente trabalho objetiva investigar as lacunas legais no tocante à segurança de barragens de rejeito de minério nas bacias de contribuição dos mananciais que abastecem a Região Metropolitana de Belo Horizonte (RMBH), evidenciando suas implicações para a manutenção da quantidade e da qualidade das águas. Por conseguinte, é elaborado um panorama das barragens da bacia do Alto Rio das Velhas em termos espaciais e legais, principalmente quanto à conformidade em relação à Política Nacional de Segurança de Barragens (PNSB). Os resultados obtidos mostram uma série de lacunas nos aspectos legais das estruturas, sobretudo no tocante à estabilidade dos barramentos, cenário que, por sua vez, compromete a segurança hídrica dos mananciais e o abastecimento de água da RMBH.</p><p><span>Abstract</span></p><p>SCENERY OF ORE TAILINGS DAMS IN THE QUADRILÁTERO FERRÍFERO “IRON QUADRANGLE” (MG) AND IMPLICATIONS FOR WATER SECURITY IN THE METROPOLITAN REGION OF BELO HORIZONTE, MINAS GERAIS STATE, BRAZIL</p><p>This paper aims to investigate the legal gaps regarding the safety of ore tailings dams in the contribution basins of the water sources that supply the Metropolitan Region of Belo Horizonte, highlighting their implications for maintaining the quantity and quality of water. In this context is featured an overview of the spatial distribution and legal aspects of the dams in the Upper Velhas River basin, involving their compliance with the National Dam Safety Politics (PNSB). The results show many legal gaps, especially regarding the structural stability, which, in turn, compromises the water resources security and the regional water supply processes.</p>

scholarly journals Associação entre valor cênico, turismo, religião e cultura na paisagem do Quadrilátero Ferrífero, Minas Gerais / Association between scenic value, tourism, religion and culture on the landscape (...)

2014 ◽  
Vol 24 (42) ◽  
pp. 198-218
Author(s):  
Luiz Eduardo Panisset Travassos
Keyword(s):  
Minas Gerais ◽  
Specific Region ◽  
Banded Iron Formations ◽  
Cultural Aspects ◽  
Brazilian Society ◽  
Iron Quadrangle ◽  
Quadrilátero Ferrífero ◽  
Initial Idea ◽  
Iron Formations ◽  
Scenic Value

A ideia para elaboração do presente trabalho surgiu a partir do convite da Sociedade Brasileira de Espeleologia para elaboração de um capítulo sobre o valor cênico, turismo e religião em regiões que apresentam cavernas desenvolvidas em formações ferríferas. A partir da ideia inicial, decidiu-se ampliar o tema para que pudéssemos incluir, também, aspectos culturais da paisagem em uma região específica como a do Quadrilátero Ferrífero (QF), em Minas Gerais. Assim, tem-se como objetivo principal da pesquisa demonstrar a possibilidade de associação entre o valor cênico, turismo, religião e cultura no QF por meio da indicação de exemplos selecionados. Palavras-chave: Valor cênico, turismo, religião, cultura, Quadrilátero Ferrífero ABSTRACTThe idea of this paper emerged after the invitation by the Brazilian Society of Speleology for preparation of a chapter on the scenic value, tourism and religion in regions with caves developed in banded iron formations. From the initial idea, the author decided to expand the theme here so one could include the cultural aspects of the landscape in a specific region such as the Iron Quadrangle (Quadrilátero Ferrífero), in Minas Gerais. Thus, the main objective of this study is to demonstrate the possible association between the scenic value of a landscape together with tourism, religion and culture by indicating selected examples, especially in the QF. Keywords: scenic value, tourism, religion, culture, Quadrilátero Ferrífero

scholarly journals The Glória quartz-monzodiorite: isotopic and chemical evidence of arc-related magmatism in the central part of the Paleoproterozoic Mineiro belt, Minas Gerais State, Brazil

2006 ◽  
Vol 78 (3) ◽  
pp. 543-556 ◽  
Author(s):  
Ciro A. Ávila ◽  
Wilson Teixeira ◽  
Umberto G. Cordani ◽  
Héctor R. Barrueto ◽  
Ronaldo M. Pereira ◽  
...  
Keyword(s):  
Minas Gerais ◽  
Crustal Material ◽  
Calc Alkaline ◽  
Isotopic Data ◽  
Zircon Age ◽  
Quadrilátero Ferrífero ◽  
Minas Gerais State ◽  
Tectonic Relationship ◽  
Mineralogical Assemblage ◽  
Chemical Evidence

The Glória quartz-monzodiorite, one of the mafic plutons of the Paleoproterozoic Mineiro belt, is intrusive into banded gneisses, amphibolites, schists and phyllites of the Rio das Mortes greenstone belt, in the southern portion of the São Francisco Craton, State of Minas Gerais, Brazil. The Glória quartz-monzodiorite yields a SHRIMP U-Pb zircon age of 2188 ± 29 Ma, suggesting a tectonic relationship with the pre-collisional phase of the Mineiro belt. According to the Nd isotopic evidence (epsilonNd(T) = -3.4; T DM = 2.68 Ga) the original magmas was formed by a mixture among Archean crustal material and Paleoproterozoic juvenile magma. The Glória quartz-monzodiorite shows metaluminous and calc-alkaline tendency with intermediate K content, comparable to that of volcanic-arc rocks. The primary mineralogical assemblage was partly modified by metamorphism, dated between 2131-2121 Ma in nearby coeval plutons. Such metamorphism is significantly older than the reported metamorphic episodes of the Mineiro belt in the Quadrilátero Ferrífero region (2059-2041 Ma) in the eastern portion of the study area. This evidence, together with chemical and isotopic data from other mafic and felsic plutons coeval with the Glória quartz-monzodiorite, indicate a tectonic and magmatic migration within the Mineiro belt from west to east.

scholarly journals Use of the DCP test for compaction control of staged dikes in mining tailings dams

2013 ◽  
Vol 66 (4) ◽  
pp. 493-498 ◽  
Author(s):  
Lincoln Ribeiro Maia de Resende ◽  
Waldyr Lopes de Oliveira Filho ◽  
Christianne de Lyra Nogueira
Keyword(s):  
Road Construction ◽  
Efficient Manner ◽  
Compacted Soils ◽  
Mining Tailings ◽  
Dynamic Cone Penetrometer ◽  
Quadrilátero Ferrífero ◽  
Minas Gerais State ◽  
Compaction Control ◽  
Tailing Dams ◽  
Core Cutter

An alternative method for quality control of earthworks in mining tailing dams is described in this article. It is composed by a penetrometer, known by the acronym DCP (Dynamic Cone Penetrometer), and is used primarily in road construction (quality assessment of pavement layers). With this apparatus, strength measurement of superficial layers of natural and compacted soils can be performed, including mine sand tailings, in a fast and efficient manner. The instrument was successfully used in the construction control of an iron ore mining tailings staged dam in the Quadrilatero Ferrifero, in Minas Gerais State, and the results showed distinctly effective densification of the embankment compacted layers, but with a sort of irregularity in their spatial distribution. In addition, field control using the traditional core-cutter method was also performed for comparison between both techniques.

scholarly journals Potencial de vulnerabilidade natural de aquíferos à contaminação no quadrilátero ferrífero, Minas Gerais e sua relação com a atividade minerária de ouro / Natural vulnerability of potential contamination to aquifers in the Iron Quadrangle (...)

2017 ◽  
Vol 27 (49) ◽  
pp. 340 ◽  
Author(s):  
Samira Da Conceição Sabadini ◽  
Úrsula De Azevedo Ruchkys ◽  
Leila Nunes Menegasse Velásquez ◽  
Thiaggo De Castro Tayer
Keyword(s):  
Mine Drainage ◽  
Minas Gerais ◽  
Mining Activity ◽  
Gold Mines ◽  
Iron Quadrangle ◽  
Quadrilátero Ferrífero ◽  
Map Analysis ◽  
Continuous Source

<p>Este trabalho teve por objetivo analisar a vulnerabilidade natural dos aquíferos à contaminação na região do Quadrilátero Ferrífero (QF), Minas Gerais e mostrar sua relação com as atividades de mineração de ouro. As minas de ouro ocorrem associadas ao Supergrupo Rio das Velhas em sua paragênese clássica de sulfetos. Foi aplicado o método GOD utilizando Sistemas de Informações Geográficas (SIG) considerando os seguintes parâmetros inerentes ao método: Tipologia do aquífero; Litologia; Profundidade do lençol freático ou nível d’água. A análise do mapa de vulnerabilidade gerado e sua correlação com a localização das minas de ouro permite afirmar que, embora a atividade de extração mineral tenha sido e ainda é significativa na região, os aquíferos apresentam baixa vulnerabilidade natural à contaminação. As áreas mais vulneráveis se encontram ao longo das serras onde atualmente se desenvolve, de forma expressiva, extração de minério de ferro. Em relação à localização das minas de ouro, a análise do mapa permite verificar que nas proximidades dessas minas a vulnerabilidade natural é baixa, o que diminui o risco de contaminação por drenagem ácida. A atividade minerária no Quadrilátero Ferrífero exercida desde os fins do século XVII representa uma fonte contínua de contaminação potencial sendo necessário o monitoramento da qualidade das águas subterrâneas e superficiais em longo prazo.</p><p><strong>Palavras–chave:</strong> mineração; água subterrânea; método GOD; geoprocessamento.</p><p><strong>Abstract </strong></p><p>This study aimed to analyze the natural vulnerability of aquifers to contamination in the region of the Iron Quadrangle (QF), Minas Gerais and show its relation to gold mining activities. Gold mines occur associated with the Rio das Velhas Supergroup in his classic paragenesis sulphides. GOD method was applied using Geographic Information Systems (GIS) considering the following parameters inherent in the method: Type aquifer; Lithology; Depth of the groundwater or water level. The analysis of the generated vulnerability map and its correlation with the location of the gold mines to suggest that, although the mining activity has been and is still significant in the region, aquifers have low natural vulnerability to contamination. The most vulnerable areas are along the mountains where he currently develops, significantly, iron ore extraction. Regarding the location of the gold mines, the map analysis shows that near these mines the natural vulnerability is low, which reduces the risk of contamination by acid mine drainage. The mining activity in the Iron Quadrangle exercised since the end of the seventeenth century represents a continuous source of potential contamination being necessary to monitor the quality of groundwater and surface water in the long term.</p><p><strong>Keywords</strong>: mining; Groundwater; GOD method; GIS.</p>

scholarly journals Range extension of Anthus nattereri Sclater, 1878 (Aves: Motacillidae) in Minas Gerais, southeastern Brazil

Check List ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 598 ◽  
Author(s):  
Luiz Gabriel Mazzoni ◽  
Alyne Perillo
Keyword(s):  
Endangered Species ◽  
New Records ◽  
Minas Gerais ◽  
Range Extension ◽  
Southeastern Brazil ◽  
The North ◽  
Quadrilátero Ferrífero ◽  
Minas Gerais State

The distribution of Anthus nattereri, an endangered species, is extended at least 170 km to the north of the nearest locality in southeastern Brazil. New records of five individuals are provided from the municipality of Itabirito, within the Quadrilátero Ferrífero region, Minas Gerais state. Anthus nattereri was photographed and tape-recorded, sometimes in sympatry with Anthus hellmayri, a species it closely resembles. Records were made mostly on burnt open grasslands (“campos limpos”) making the conservation of this species a difficult task. 

scholarly journals Proposals for Reducing Damage Caused by Dams Collapse in Pitinga - Amazonas

2019 ◽  
Vol 7 (11) ◽  
pp. 01-13
Author(s):  
Dayana De Lira Martins da Silva ◽  
Flavia Emanuele Rosas Costa ◽  
Igor Bezerra de Lima ◽  
David Barbosa de Alencar ◽  
Ricardo Silva Parente
Keyword(s):  
Social Environment ◽  
Minas Gerais ◽  
Environmental Risks ◽  
The State ◽  
Mitigation Measures ◽  
Environmental Damage ◽  
Tailings Dams ◽  
Environmental Transformation ◽  
Intrinsic Characteristic ◽  
Social And Environmental Risks

Mining is an extractive activity that interferes with the economic, environmental and social environment. Thus, its intrinsic characteristic is locational rigidity, environmental transformation and the generation of social and environmental risks. Thus, this study aimed to present in the literature what is the best mitigating measure to be adopted in order to try to reduce the impacts on possible collapses in the Pitinga tailings dams in the Amazon. From this study it can be stated that among the 29 dams located in the State of Amazonas, 8 are from ore tailings and are located in the municipality of Presidente Figueiredo, in the Pitinga region, as regards supposed risks of a disaster, the perceived scenario in Minas Gerais can hardly occur, since the tailings dams have a natural containment because they are built in valleys. However, in order to reduce damage and prevent possible collapse in ore enterprises, it is essential that mitigation measures are used to compensate for environmental damage caused by the practice of ore extraction.

scholarly journals HIERÓPOLIS E HIEROFANIAS: UMA ABORDAGEM GEOHISTÓRICA E ETNOGEOGRÁFICA DA “CIDADE- SANTUÁRIO” DE CONGONHAS IMBRICADA COM OS ESTUDOS DA PAISAGEM

2016 ◽  
Author(s):  
José Antônio Souza de Deus
Keyword(s):  
Latin American ◽  
Cultural Context ◽  
Cultural Landscapes ◽  
Minas Gerais ◽  
Cultural Issues ◽  
Landscape Studies ◽  
Iron Quadrangle ◽  
Quadrilátero Ferrífero ◽  
Religious Landscape ◽  
Mining Regions

ResumoA partir de uma discussão sobre a relevância que têm assumido as questões culturais no campo das Geociências, esse trabalho se propõe a discutir a cidade de Congonhas como uma hierópolis, situada no contexto histórico-cultural das regiões de antiga mineração do Brasil. O artigo resgata várias contribuições de geógrafos culturais para o entendimento das problematizações vinculadas às paisagens culturais e à “Geografia das Religiões”, nos contextos brasileiro e latino-americano- contemplando, em paralelo, questões como o papel que assumem as formas arquitetônicas e, particularmente, as edificações em pedra (construídas nas cidades do Quadrilátero Ferrífero/MG), na interpretação da paisagem religiosa.Palavras Chave: paisagens culturais, hierópolis, geografia das religiõesAbstractHIEROPOLIS AND HIEROFANIAS: A GEOHISTORICAL AND ETHNO-GEOGRAPHICAL APPROACH OF THE "SANCTUARY CITY" OF CONGONHAS IMBRICATED WITH THE LANDSCAPE STUDIES. After scoring the relevance that has characterized cultural issues in Geoscientific approaches lately, this paper aims to discuss Congonhas town as a hieropolis located in the historical and cultural context of former mining regions in Brazil. The research rescues several cultural geographers’ contributions to understand the problematizations linked to cultural landscapes and "Geography of Religions" in Brazilian and Latin American contexts- while discussing the role that assume the architectural forms, and particularly, the stone buildings (built in the cities of Iron Quadrangle/ Minas Gerais- Brazil) in religious landscape interpretation.Keywords: cultural landscapes, hieropolis, geography of religions

scholarly journals DISTRIBUIÇÃO E ASPECTOS METALOGENÉTICOS DAS OCORRÊNCIAS DE SCHEELITA NO PRÉ-CAMBRIANO DO ESTADO DE MINAS GERAIS, BRASIL

1996 ◽  
Author(s):  
Ronaldo Mello Pereira ◽  
Ciro Alexandre Ávila
Keyword(s):  
Greenstone Belt ◽  
Shear Zones ◽  
Minas Gerais ◽  
Granitic Rocks ◽  
Southeastern Brazil ◽  
General Description ◽  
Fold Belt ◽  
Quartz Veins ◽  
Iron Quadrangle ◽  
Minas Gerais State

This paper presents a general description of six scheelite mineralized areas in Minas Gerais State,southeastern Brazil:- Nazareno - São João Del Rei - Lagoa Dourada area where scheelite occurs confined to orthoamphibolitic rocks of the Barbacena Greenstone Belt;- Iron Quadrangle area where most scheelite occurrences are related to a auriferous shear zones of theNova Lima Group of the Rio das Velhas Greenstone Belt;Itinga - Coronel Murta - Rubelita area in the Araçuai Fold Belt where scheelite is present in calcsilicaterocks interlayered with metasedimentary schists of the Macaubas Group and in quartz vein withwolframite;- Galiléia-Mendes Pimentel area in Costeiro Fold Belt where scheelite mineralization occurs in calcsilicatelayers and quartz veins, in schists of the São Tomé Group;- Itamonte - Itanhandu area in the Ribeira Fold Belt where scheelite is related to greisen of leucocraticgranitoids cupolas;- Rio Manhuaçu - Mutum area in the Costeiro Folded Belt where the scheelite mineralization ispresent in calc-silicate xenoliths associated with granitic rocks of the Pocrane Complex.

Sign in / Sign up

Export Citation Format

Share Document