An application of gravity anomaly edge identification method to division of tectonic units in the overburden of Inggen-Ejin basin

Abstract To enhance the support for the construction of ecological civilization and high-quality economic and social development, it is imperative to extend geological studies from bedrock areas to covered areas, particularly focusing on basin-mountain combination zones. The Inggen-Ejin basin, a representative covered area, is crucial for investigating water prospects in concealed regions, understanding basin base properties, and analyzing basin-mountain tectonic relationships. A comparative analysis of various boundary recognition techniques was conducted using 1:250,000 regional gravity data. This approach facilitated the comparison of different methods’ characteristics and identified an appropriate recognition technique for the area. The processing results were validated against existing geological data, enabling the identification and extraction of fault structures within the study area. Ultimately, this research determined the location and strike of deep and large faults, and delineated Mesozoic tectonic units.