Study of the Earth's crustal structure in the Area of Kon Tum and It's adjacent using boundary determination method and 3D inversion from gravity data

Abstract

This paper presents researching results of the application of maximum horizontal gradient of gravity anomaly and analytic signal to determining fault systems. The analytical workflow of the 2D modeling problem is used as input data for constructing an initial 3D model and performing 3D inversion to determine the depths of the crystalline basement and the Moho surface. The results have shown that: The fault system in the study area is quite complex, including the Northwest - Southeast, sub-meridian and Northeast - Southwest fault systems. Large and deep faults have been identified and recognized such as: Song Po Co, Ba To - Kon Tum, Song Ba, Hung Nhuong - Ta Vi; The depth of the crystalline basement in the area ranges from 1km to 3.4km, with the location of the basement reaching great depths in the Northwest and Southeast of the area; The depth of the Moho surface changes continuously from 27km to 35km. The deepest location of the Moho is in the Northwest and tends to gradually rise towards the East.