Detection of Geological Structures in the Gol Gohar Mining Iron Ore Area Using Airborne Magnetic Data

Document Type : Research Article

Authors

Dept. of Mining and Metallurgy Engineering, Yazd University, Yazd, Iran

Abstract

This study focuses on the analysis of airborne magnetic data to identify surface and subsurface structures at various depths within the Gol Gohar mining area. The Gol Gohar region is recognized as one of the active mining areas in Iran, comprising six major anomalies along with several minor anomalies that contribute to significant complexities in its geological structures. Despite numerous studies conducted in this area, its deeper structures have not been thoroughly examined. The data utilized in this study consists of airborne magnetic data, with a line spacing of 500 meters and an average flight altitude of 120 meters. The methodology of this research begins with the application of the Reduced to the Pole (RTP) filter, utilizing Fast Fourier Transform (FFT) techniques to distinguish local residual structures from broader regional features. This multiscale approach facilitates a deeper understanding of the geological complexities within the study area and reveals its subsurface structures. Subsequently, advanced geophysical methods such as Total Horizontal Derivative (TDHR) and Tilt Angle Derivative (TDR) are employed to delineate the boundaries of anomalies. The objective of employing these methods is to delineate the structural boundaries of magnetic anomalies.  Additionally, an advanced method for estimating the depth of magnetic anomalies, known as Euler Deconvolution, has been employed. Interpretations derived from the airborne magnetic data indicate that the geological structures generally trend NW-SE and are disrupted and offset by a series of faults with an approximately N-S orientation. Furthermore, the results suggest that ferromagnetic bodies are situated at considerable depths, extending from the NW towards the SE. This study is particularly important for identifying the magnetic anomaly structures in the Gol Gohar mining area, as it not only reveals the concealed anomalies of this mineral-rich region but also clarifies the arrangement of these anomalies effectively.

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References

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History

  • Receive Date: 16 November 2024
  • Revise Date: 05 January 2025
  • Accept Date: 22 January 2025

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