Lithology
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. Correlations of rock mass classifications applied to ferruginous caves
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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2. And people already ask with malice: Where is ...
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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3. Relationship between land use and water quality in a watershed impacted by iron ore tailings and domestic sewage
Resumo O uso e ocupação do solo, o aumento populacional e a urbanização de áreas próximas a bacias hidrográficas causam diversos impactos negativos na qualidade das águas superficiais. Diante essa assertiva, foi realizado um estudo abrangente sobre a qualidade da água na bacia hidrográfica do Rio do Peixe, tributário do Rio Doce, localizado no Qua
Rev. Ambient. Água. Publicado em: 10/10/2019
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4. Development and application of a flexible numerical model to evaluate the safety of room-and-pillar mines
Abstract The design of room-and-pillar mines relies on the correct estimation of the safety indicator of the underground structures formed by the excavation of drifts. Thus, the study of the geomechanical behavior is of vital importance. The mathematical models play an important role in the identification of problematic areas and allows different configurati
REM, Int. Eng. J.. Publicado em: 2019-03
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5. Genesis and Classification of Nitisols from Volcano-Sedimentary Lithology in Northeastern Brazil
ABSTRACT On the southern coast of Pernambuco State (PE), Brazil, lithotypes of the Cabo Basin (volcanic and sedimentary rocks), in association with the relief, allow the determination of the dynamics of the formation of Nitossolos Háplicos (Nitisols), including those with high levels of exchangeable aluminum. The objective of this study was to evaluate the
Rev. Bras. Ciênc. Solo. Publicado em: 14/02/2019
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6. Multinomial Logistic Regression and Random Forest Classifiers in Digital Mapping of Soil Classes in Western Haiti
ABSTRACT Digital soil mapping (DSM) has been increasingly used to provide quick and accurate spatial information to support decision-makers in agricultural and environmental planning programs. In this study, we used a DSM approach to map soils in western Haiti and compare the performance of the Multinomial Logistic Regression (MLR) with Random Forest (RF) to
Rev. Bras. Ciênc. Solo. Publicado em: 02/07/2018
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7. Geochemical Signature of Amazon Tropical Rainforest Soils
ABSTRACT: Evaluating soil geochemical diversity in the Amazon Basin has been a challenge largely because most study sites have been at the edge of the basin and it is difficult to get samples in such a region. Here we show that even among the most weathered soils, physicochemical soil properties express lithology. Our results are based on topsoil samples col
Rev. Bras. Ciênc. Solo. Publicado em: 15/02/2018
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8. Mineralogy of the Clay Fraction and Chemical Properties of Soils Developed from Sedimentary Lithologies of Pirambóia, Sanga-the-Cabral and Guará Geological Formations in Southern Brazil
ABSTRACT Quali-quantitative and crystallographic characterizations of the different minerals of a soil are essential for the best evaluation of its genesis, degree of weathering, active pedogenetic processes, physical and chemical properties, and its potential reserve of mineral nutrients. This study presents the results of mineralogical investigations carri
Rev. Bras. Ciênc. Solo. Publicado em: 31/08/2017
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9. Chemical-Mineralogical Characterization of Magnetic Materials from Magnetic Soils of the Southern Espinhaço Mountain Chain and of the Upper Jequitinhonha Valley, State of Minas Gerais, Brazil
ABSTRACT In the Southern Espinhaço Mountain Chain and in the Upper Jequitinhonha Valley, magnetic soils, in different pedogenetic stages, are found to be forming over intrusions of basic lithology. The essential chemical and mineralogical properties of samples from magnetic soil profiles from those two physiographic environments in the state of Minas Gerais
Rev. Bras. Ciênc. Solo. Publicado em: 27/03/2017
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10. Vulnerabilidade à contaminação das águas subterrâneas no município de Humaitá, Amazonas, Brasil
Resumo Os recursos hídricos subterrâneos têm sido utilizados em grande escala em todo o território brasileiro. No sul do estado do Amazonas, sua utilização é exclusiva em vários municípios, porém esta região é caracterizada pelo precário quadro de saneamento básico. Considerando-se tal importância das águas subterrâneas, foi realizado um est
Rev. Ambient. Água. Publicado em: 2016-06
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11. A mineraÃÃo de agregados na regiÃo metropolitana de Fortaleza: impactos ambientais e conflitos de uso e ocupaÃÃo do solo / The mining of aggregates in the metropolitan region of Fortaleza: environmental impacts and use conflicts and land use
The Metropolitan Area of Fortaleza has great potential natural and economic for the development of mining of aggregates. Diversity of lithology ensures good supply of material for immediate use in civil construction and economic growth associated pent-up demand by building housing and also the deficiencies, of urban structure form the scenery favorable to ex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2010
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12. ESTUDOS SOBRE A RELAÇÃO ENTRE O CARBONO ORGÂNICO DISSOLVIDO E ELEMENTOS METÁLICOS MAIORES E TRAÇOS EM ÁGUAS DO LESTE DO QUADRILÁTERO FERRÍFERO,MG
In this work relations between the metallic elements and organic carbon dissolved (COD) in aquatic environments in the east of the Iron Quadrangle, Minas Gerais state, have been studied. This region was chosen for the study, because it is very rich in metals and one of the biggest mining areas in Brazil. It possesses many old mines and others which continue
Publicado em: 2010