Padrões de lineamentos e controle estrutural, tectônico e neotectônico no relevo da região de Pancas (Espírito Santo, sudeste do Brasil)

Abstract

The main objective of this research is to investigate the lithostructural, tectonic and neotectonic control in the relief of the Pancas region (Espírito Santo, Southeast of Brazil). The methodology was organized in office and field analyses. In the office, maps of lineaments and structural trends were generated, using the manual extraction technique, using editing tools from the ArcGIS 10.3.1™ software (ESRI, 2012), on a Digital Elevation Model (DEM) with different artificial lighting (scale 1:110,000) and generated orientation rosettes. The geological and geomorphological maps were organized/elaborated with ArcGIS, from the Geographic Information System (GIS) and the cartographic bases were configured in the UTM and DATUM SIRGAS 2000 projection system, zone 24S, later analyzed and compared with the data from the orientations of the traced lineaments, with the orientation of the faults of the studied outcrops and with the existing literature. The results showed NW-SE/NNW-SSE and NE-SW/NNE-SSW orientations, with the predominance of the NNW-SSE and NW-SE orientations identified in the analysis of the lineaments and structural trends, similar to the orientations of the geological faults and of the neotectonic faults present in the studied area, reflecting the regional structure of the area, presenting the same orientations of the Colatina band. The secondary orientations of the Araçuaí Orogen (NE-SW), the identification of morphotectonic features, the presence of abrupt topographic differences (topographic profiles), the identification of tectonic regions (base surface map) and tectonic blocks (scan profile) demonstrate the tectonic control in the relief of the Pancas-ES region, reaching the objective of this research.