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Abstract
Introduction: The purpose of this paper is to determinate the position, depth, dip direction and dip angle the faults in the South region of Vietnam from the total magnetic intensity anomalies, that reduced to the magnetic pole (RTP).
 Methods: Based on the Oasis Montaj software, we proposed a new way to compute the positions and the depth to the top of the faults by combining the Tilt angle and the Euler deconvolution methods. In addition, the angle and direction of the dip of theses faults were also determined by considering maximum of the total horizontal derivative of the RTP upward continuation at the different height levels.
 Results: The results show that there are 12 faults along the longitudinal direction, latitudinal direction, Northwest — Southeast direction and Northeast — Southwest direction with the mazimum depth is about 3100 m and the dip angle changes in the range of 65-82◦.
 Results: These indicate that these methods are valuable tools for specifying the characteristics of geology, contribute to give and confirm the useful information on geological structure in the South region of Vietnam.
Highlights
The purpose of this paper is to determinate the position, depth, dip direction and dip angle the faults in the South region of Vietnam from the total magnetic intensity anomalies, that reduced to the magnetic pole (RTP)
After removing the normal magnetic field was calculated by the formula of Nguyen Thi Kim Thoa (1992) 23, the magnetic anomalies map (Figure 2) showed that the magnetic anomalies were relatively stable, on which the anomalous bands prolonged to the North-South direction with positive — negative zones alternating
The magnetic anomalies map and the RTP were built for the initial evaluation of structure and characteristics of anomalies in the South region of Vietnam
Summary
The purpose of this paper is to determinate the position, depth, dip direction and dip angle the faults in the South region of Vietnam from the total magnetic intensity anomalies, that reduced to the magnetic pole (RTP). Methods: Based on the Oasis Montaj software, we proposed a new way to compute the positions and the depth to the top of the faults by combining the Tilt angle and the Euler deconvolution methods. Due to the importance of problem, many other methods have been proposed in the past to determine the position of the boundary and the depth of the source individually or the combination of both, such as the Werner method Werner method [3,4], Euler deconvolution 5,6...
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