Mineral Based Activities
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Peculiarities of drilling and blasting in underground small-scale mines
Abstract Artisanal and Small-scale Mining (ASM) is a prominent activity in the extractive industry: considering only gold, it produces about 20% of the world market supply. Despite this fact, ASM is generally associated with the negative aspects of its environ mental impact, and operational research is generally neglected. This article empha sizes the peculi
REM, Int. Eng. J.. Publicado em: 2020-09
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2. High Uranium Concentrations in the Groundwater of the Rio de Janeiro State, Brazil, Mountainous Region
Unexpectedly high uranium concentrations, up to 930 µg L-1, approximately thirty times higher than the World Health Organization (WHO) guidance level, were observed in groundwater samples from the mountainous region near Rio de Janeiro City, the so-called “Região Serrana”, approximately 60 km from the city. This region is characterized by a large numbe
J. Braz. Chem. Soc.. Publicado em: 2019-02
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3. ABORDAGEM GEOMORFOLÓGICA NO ESTUDO DO PATRIMÔNIO MINEIRO
RESUMO O trabalho tem como objetivo analisar o potencial do relevo antropogênico enquanto dimensão ainda pouco explorada do patrimônio mineiro, pois compreende que as feições geomorfológicas oriundas do processo de extração mineral possuem valor para ações de geoconservação. Foi realizado o levantamento e análise de referências bibliográficas
Mercator (Fortaleza). Publicado em: 31/01/2019
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4. The Quest for land at Piranema sand cluster
Abstract The Piranema Sand Cluster, located between the Seropédica and Itaguaí counties of Rio de Janeiro Metropolitan Region, is responsible for 65% of the sand used in construction works of the region and is the home of approximately 47 small mining companies. The construction works in progress in this area make this mining district a critical success fa
REM, Int. Eng. J.. Publicado em: 2018-07
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5. Analysis of the economic feasibility of a mining project due to the presence of natural underground cavities
The legislation for the protection and conservation of caves is recent in Brazil. In 2008, the Decree 6.640 was enacted and in 2009, the Normative Instruction Nº 2 by the Brazilian Environment Ministry (MMA, Portuguese acronyms) was published. Mining operations cause a significant impact on the caves when they are present in or next to the mineral body. The
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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6. Soil health: looking for suitable indicators. What should be considered to assess the effects of use and management on soil health?
Soil Health refers to the ecological equilibrium and the functionality of a soil and its capacity to maintain a well balanced ecosystem with high biodiversity above and below surface, and productivity. To understand and use soil health as a tool for sustainability, physical, chemical, and biological properties must be employed to verify which respond to the
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-08
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7. Doenças respiratórias associadas à atividade de mineração no município de Parelhas, região do seridó norte-riograndense
O presente trabalho tem por objetivo a caracterização de trabalhadores em atividades de base mineral expostos aos danos pulmonares, no Município de Parelhas/RN, buscando relacionar as patologias respiratórias que mais se manifestam nesta população a atividades de base mineral. A área estudada (cidade de Parelhas) localiza-se no Seridó oriental norte-
Publicado em: 2009
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8. Paisagem natural paleógena da bacia sedimentar de São Paulo no município de Guarulhos, Estado de São Paulo.
Sedimentary rocks of Cenozoic age, composed primarily of sand and clays, can be found in the city of Guarulhos, located in the metropolitan area of the city of São Paulo, State of São Paulo, Brazil. Paleogene sediments of this region represent a significant source of water for urban, industrial and agricultural activities. This basin is an integral part of
Publicado em: 2008
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9. Influence of calcium supplementation on blood lead levels and markers of lead exposure in posmenopausal women / Influência da suplementação de cálcio sobre os níveis de chumbo e indicadores da exposição ao chumbo em mulheres na pós-menopausa
The accelerated bone loss that occurs during menopause and becomes more prone in the postmenopausal period is mediated by the ending of estrogen production. This bone loss can be a threat for women in this period of life concerning to the lead toxicity. Around 95% of the lead accumulated in the body is stored in the bones and may be mobilized to the bloodstr
Publicado em: 2008
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10. "Um estudo sobre o desequilíbrio radioativo da série do urânio em amostras de solo" / A study on radioactive disequilibrium of the uranium series in soil samples.
The specific activities of 238U , 226Ra, 210Pb, 232Th and 40K were measured, and the 226Ra/238U and 210Pb/226Ra activity ratios were calculated for samples collected in a 2.10 m deep soil profile in a preserved area of the São Paulo Botanic Garden. The sampling site is covered by dense vegetation that, together with the upper soil layer, has not been distur
Publicado em: 2006
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11. Avaliacao dos produtos integrados TM-Landsat, Radarsat e gamaespectrometricos na caracterizacao tectonica e mapeamento geologico de area mineralizada em ouro na regiao de Alta Floresta - MT / Landsat TM, Radarsat and airborne gamma ray digital data integrated products evaluation for tectonic characterization and geological mapping of a gold mineralized area, "Alta Floresta" region MT
The Alta Floresta region, located in the northern part of the Mato Grosso State, is characterized by an almost flat terrain, with intense anthropogenic activities, a high potential in terms of gold mineralization, and a poor geological knowledge. This research has focussed on the application of digital remote sensing integrated products (TM-Landsat/Standard
Publicado em: 1999
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12. A produção de ouro do Estado de Mato Grosso
This dissertation deal with a research on gold mining in Mato Grosso state, since its historical period in the Colonial times until the second Gold Cycle, which attained its climax in the 80 s. Besides geographical, social, economic and historical features of Mato Grosso state, the resumption of prospectors activities in the end 70 s followed by several mini
Publicado em: 1997