Subsurface structural mapping from high-resolution gravity data using advanced processing methods

The study area has a complex geological structure and is studied for mapping the density interfaces using geophysical techniques. However, it has not been studied for mapping geological structures, such as contacts and faults that appear as lineaments in gravity data. In this study, the lineaments in the area have been delineated using Bouguer gravity anomaly data, though some modern processing methods, such as horizontal gradient amplitude (HGA), tilt angle of horizontal gradient amplitude (THGA), and enhancement of horizontal gradient amplitude (EHGA). Most of the identified lineaments are trending in the NW-SE direction and some WE-trending lineaments in the southeastern region. This study provides new information for a better understanding of the structural framework and tectonic setting of the Thua Thien Hue area. (c) 2021 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

The study area with a complex geological structure was investigated using geophysical techniques to map density interfaces, while neglecting the mapping of geological structures such as contacts and faults visible in gravity data as lineaments. Through modern processing methods like HGA, THGA, and EHGA, the study delineated lineaments trending mainly in the NW-SE direction and some in the WE direction in the southeastern region, providing new insights into the structural framework and tectonic setting of the Thua Thien Hue area.