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Understand how the Gravimetric Method works

Gravimetry is a geophysical method that consists of measuring the acceleration of gravity at predetermined points on the surface of the terrain. This process aims to map density contrasts of materials in the subsurface, allowing the detection of local variations in the Earth’s gravitational field due to lateral changes in the Earth’s density.

These variations, known as gravimetric anomalies, result from differences in density between various rocks in the Earth’s subsurface. The application of gravimetry in prospecting encompasses the search for oil and gas storage structures, as well as economically relevant mineral deposits, such as chromite, iron and copper sulfides, for example. This method offers valuable insights into the distribution of mass in the subsurface, revealing the presence of rocks with different densities.


Main Products and their Applications

After a gravimetric data acquisition campaign, the correction stages (open-air, latitude, tide, Bouguer and instrumental drift) and processing are carried out, resulting in the following main products:

  • Air-free anomaly map;
  • Complete Bouguer anomaly map;
  • Regional and Residual Bouguer anomaly maps;
  • 2D Profile/Modeling;
  • 2D and 3D inversion.

Through gravimetric surveys, it is possible to identify the largest gravimetric anomalies in a region in a comprehensive way. Subsequently, during field checks, it is possible to identify the lithologies present in the area. This information, combined with bibliographic research, makes it possible to evaluate the possibility of the occurrence of minerals in that particular area in order to move forward with other stages of research.

If you are looking for a company specialized in applying the geophysical method of gravimetry, contact us!

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