Modelling of earth’s geothermal subtle traps using gravity Euler deconvolution

Abstract

Euler deconvolution technique is one of the methods that predicts the subsurface features and structures with help of gravity modelling. The present study was performed to identify the earth’s geothermal potentials in Dholera, Unai, and Gandhar regions of Gujarat, India using gravity technique. The structures and layers of the subsurface were determined by performing the gravity survey and the interpretation of data was carried out using Euler Deconvolution. The survey was conducted along six profile lines: five horizontal and one perpendicular to others in the study areas. After acquiring gravity data, various corrections were applied to convert raw gravity data to corrected Bouguer gravity data. In this paper density of the subsurface formation has been determined using Nettleton and Parasnis methods, which suggests that the subsurface of Dholera, Unai, and Gandhar have densities close to sedimentary rocks. After density determination, regional and residual separation was performed on the Bouguer gravity data to get information on geothermal causative bodies. In this paper, the Euler Deconvolution method was applied to interoperate the spatial position and depth of the subtle geothermal bodies. The Euler solutions for depth in Dholera, Unai, and Gandhar range between 1324–4300 m, 1877–4813 m, and 2345–5536 m. The results of gravity Euler Deconvolution suggests the presence of geothermal potential in these regions.