NDLI: Cartografía geológica y reconocimiento de áreas de alteración hidrotermal con imágenes LANDSAT-TM en el área de La Manchuria, Macizo del Deseado, Patagonia Argentina.

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Cartografía geológica y reconocimiento de áreas de alteración hidrotermal con imágenes LANDSAT-TM en el área de La Manchuria, Macizo del Deseado, Patagonia Argentina.

Content Provider	Semantic Scholar
Author	Marchionni, Daniela Speme Tessone, Mario
Copyright Year	2009
Abstract	During the last years, the Deseado Massif has been strongly studied, in order to locate precious metals (Au, Ag) bearing mineralization, spatially and temporally associated to the Jurassic acid volcanism of Chon Aike Formation. Within this morphostructural unit, in the La Manchuria area, mineralised vein type structures and disseminated bodies with probable economic significance have been recognised. These ones are related to the main fracture systems and to hydrothermal alteration zones. In this paper we present the results of an investigation based on the analysis and interpretation of LANDSAT-TM multispectral images, which contribute to the geological and structural analysis of this area and to the recognition of hydrothermal alteration zones. Several images processing strategies for mineral exploration have been applied (color compositions, band ratios, density slicing) and a complete geological and structural cartography of the whole area was obtained from remote sensing data and detailed field works. Several areas characterised by the presence of mineral concentrations and hydrothermal alterations have been identified and then characterized by field observations and laboratory analysis. The employed methodology allowed us to confirm again the potential of LANDSAT- TM images for geological mapping and for hydrothermal alteration zones identification in the Deseado Massif and to establish prospecting guides that will facilitate the search of other mineralised areas in the nearness or in similar geological environments.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://marte.dpi.inpe.br/col/dpi.inpe.br/sbsr@80/2008/11.18.01.03.57/doc/3269-3276.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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