Abstract
This paper presents a study of the structural lineaments of the Pantanal extracted visually from satellite images (CBERS-2B satellite, Wide Field Imager sensor, a free image available in INTERNET) and a comparison with the structural lineaments of Precambrian and Paleozoic rocks surrounding the Cenozoic Pantanal Basin. Using a free software for satellite image analysis, the photointerpretation showed that the NS, NE and NW directions observed on the Pantanal satellite images are the same recorded in the older rocks surrounding the basin, suggesting reactivation of these basement structural directions during the Quaternary. So the Pantanal Basin has an active tectonics and its evolution seems to be linked to changes that occurred during the Andean subduction.
Highlights
The main purpose of this paper is to study the structural lineaments of the Pantanal extracted from CBERS-2B satellite images (Wide Field Imager sensor – WFI) combined with field information, and to investigate possible relationships between the structural directions obtained and the reactivation of the basement structures
- The third system trending EW is situated on the southern edge of the Pantanal Basin, being well marked between the alignments of the Negro River and the Tucavaca lineament
The results of this study are similar to the data obtained by the Geological Survey of Brazil in the area surrounding the Pantanal Basin
Summary
The main purpose of this paper is to study the structural lineaments of the Pantanal extracted from CBERS-2B satellite images (Wide Field Imager sensor – WFI) combined with field information, and to investigate possible relationships between the structural directions obtained and the reactivation of the basement structures.Besides the identification of geological struc tures, another purpose of this study is the utilization of free satellite images and a free software in order to evaluate their potential as structural analysis tools.In the present work we identified three main lineament directions: NE, around N-S, and E-W. The main purpose of this paper is to study the structural lineaments of the Pantanal extracted from CBERS-2B satellite images (Wide Field Imager sensor – WFI) combined with field information, and to investigate possible relationships between the structural directions obtained and the reactivation of the basement structures. Besides the identification of geological struc tures, another purpose of this study is the utilization of free satellite images and a free software in order to evaluate their potential as structural analysis tools. In the present work we identified three main lineament directions: NE, around N-S, and E-W. The first two structures are older and related to reactivations of basement structures. In this paper the term lineament is used according to the definition of O’Leary et al (1976), “mappable linear surface features which differ distinctly from the patterns of adjacent features and presumably reflect subsurface phenomena”
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