Integrating onland lineaments with offshore data using a GIS approach – a case study from the Kutch Basin, India

Abstract

The offshore Kutch Basin is a southwestern extension of the onland Kutch Basin, which is located on the west‐northwest margin of the Indian Shield. The objective of this technical note is to map lineaments over the land portion of the Kutch Basin, identify major lineament zones, and provide evidence for the extension of these zones into the offshore portion of the Kutch basin. Lineaments in the onland part have been identified on Landsat TM and IRS‐1D WiFS data and three dominant lineament trends, ENE–WSW, NW–SE, and NE–SW, have been identified. In this part of the Kutch Basin, analysis of the lineament map in concert with supporting data (gravity, bathymetry, tectonic) has led to the identification of six major lineament zones, and a number of these zones appear to continue offshore, based on inspection of the supporting data. It appears that these lineament zones have divided the offshore basin into a number of tectonic blocks and this apparent pattern map helps to understand the architecture of the offshore basin.