Multi-scale approach using remote sensing images to characterize the iron deposit N1 influence areas in Carajás Mineral Province (Brazilian Amazon).
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Date
2012
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Abstract
Mining activities cause a wide range of changes
to the environment, substantially affecting both the physical
and biological environmental sectors. In the Caraja´s
Mineral Province, located in the Amazon rainforest, environmental
regulations tend to be more rigorous, due to the
fragility of the environment in which large iron deposits are
found. The characterization of the impact of mining on
environment considers: the type and extent of the impact,
the physical chemistry differences and similarities of the
mineral deposits, the deposit size, the adopted mining
process, and the environment (both natural and economic)
in which the mining process was developed. Remote
sensing technology is utilized in this study, in particular,
the use of ortho-aerial photograph, and optical and radar
images with distinct spatial resolution. These permit the
elaboration in synoptic maps, multi-scale and dynamic, of
the changes wrought upon the environment: deforestation,
removal of vegetation cover, topographic surface and
landscape alteration, and slope instabilities among others.
In this aspect, determining the extent of influence of the
mining activity is directly tied to the characterization of its
impact on various natural systems at the observed scale,
and not by simply defining a predetermined Euclidean
distance. The results showed that remote sensing technology,
optical and radar images, proved to be efficient in the
study of environmental information and the areas of
influence on the semi-regional and local scales in the
Amazon forest.
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Keywords
Brazilian Amazon, Iron ore, Area of influence
Citation
MORAIS, M. C. de.; MARTINS JÚNIOR, P. P.; PARADELLA, W. R. Multi-scale approach using remote sensing images to characterize the iron deposit N1 influence areas in Carajás Mineral Province (Brazilian Amazon). Environmental Earth Sciences, v. 66, p. 2085-2096, 2012. Disponível em: <https://link.springer.com/article/10.1007/s12665-011-1434-9>. Acesso em: 20 de jun. 2017.