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Identification of Lineaments in the Pravara Basin from ASTER-DEM Data and Satellite Images for their Geotectonic Implication

Author Affiliations

  • 1Dept. of Geography, Shivaji University, Kolhapur, Maharashtra, INDIA
  • 2 Indian Institute of Geomagnetism, Navi Mumbai, Maharashtra, INDIA

Int. Res. J. Earth Sci., Volume 2, Issue (7), Pages 1-5, August,25 (2014)

Abstract

Lineaments are long, linear to slightly curvilinear, geological features with regional to local extent. These are considered to be zones of structural weakness and are important from geological, geomorphological and hydrological perspective. The minerals and water bodies are seen to play along lineaments. Hence, their identification and mapping assumes social and economic significance. Earlier, lineament identification was ambiguous and not too accurate, due to overemphasis on visual interpretation of toposheets and contour maps. These are however filled with cultural bias in terms of man-made drainage lines and anthropogenic land use practices. This lacuna is being overcome by using remote sensing images and interpreting shaded relief, slope, and aspect images, created with Geographical Information System (GIS) software and ASTER-DEM data. The results demonstrate that the lineament detection from Remote Sensing (RS) data and GIS techniques achieves better accuracy compared to traditional sources of lineament identification methods. It has provided better geotectonic understanding of Deccan trap terrain. The imprints of western Ghat orogeny are seen in upper stream section of Pravara basin. Line of crustal dislocation is also identified. The study will help in understanding the geomorphological features and geotectonic implications for Pravara basin.

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