Magnetometry
Magnetometry is a passive, non-invasive geophysical survey technique designed to detect local anomalies in the Earth’s magnetic field. These variations result from differences in the magnetic properties between buried sediments or structures and their natural surroundings. Because it does not disturb the ground, it is an ideal method for conducting preliminary investigations to determine the composition of the subsurface before any direct intervention is carried out.
High-sensitivity sensors are used to record these variations, reliably identifying various elements hidden beneath the surface. This technique is essential for locating archaeological remains such as walls, ditches, pits, kilns, or thermally altered soils. Furthermore, it is equally effective in industrial applications for detecting buried man-made metallic objects, including pipes, cables, military artifacts, or accumulations of ferromagnetic materials.
The workflow involves the systematic collection of data using multi-channel equipment mounted on manual trolleys. To cover large areas, our product catalog offers motorized accessories for towing the equipment, thereby speeding up data acquisition. Additionally, measurements are georeferenced using high-precision differential GPS with centimeter-level accuracy to facilitate their subsequent integration into geographic information systems.
Once collected, the data is processed using correction and noise-reduction filters to generate interpolated magnetograms in units of nT or nT/m. These two-dimensional maps clearly visualize the detected anomalies, as they reflect the dimensions, orientation, and magnetic susceptibility of the target, thereby providing an accurate representation of the subsurface.
To complement these studies and obtain three-dimensional data of the highest resolution, we offer advanced ground-penetrating radar (GPR) systems. These innovative devices enable the professional capture, processing, and interpretation of valuable volumetric information, yielding precise horizontal cross-sections at various depths that can be easily exported to fully standardized formats such as KMZ or CAD.
