DRON-MAG: THE BEST SOLUTION IN AIRBORNE MAGNETOMETRY
With DRON-MAG we can efficiently and automatically survey vast areas of land. We ensure reliable studies across all types of terrain, including highly rugged or hard-to-access zones. Thanks to our stabilization system, UAV platform, and advanced processing methodology, we deliver precise results while saving both time and resources.
The drone-based magnetic survey system (DRON-MAG) was implemented by ZISSOU AUSTRALIA to obtain high-resolution magnetic measurements along any flight direction in less time, thereby reducing acquisition costs. Similar to ground methods, DRON-MAG measures anomalies in the Earth’s magnetic field caused by the magnetic properties of surrounding rocks.
The acquisition method consists of installing a base magnetometer (fixed to the ground) within the study area to monitor diurnal variations in the magnetic field. The DRON-MAG system then flies the survey grid lines, recording magnetic data at 0.1-second intervals (10 Hz). Flight altitude depends on terrain ruggedness, ranging from 30 m in semi-flat areas to 70 m in rugged terrain. The DRON-MAG system has successfully completed surveys under challenging geographic and climatic conditions, operating at altitudes exceeding 5,000 meters above sea level.
Processing
Total Magnetic Intensity (TMI) Gridding
Magnetic prospecting has a wide range of applications. Through analysis, 2D/3D modeling, and interpretation of magnetic anomalies, the DRON-MAG method enables the detection of iron ores and ferromagnetic formations with associated gold mineralization, skarns, porphyries, and mineralization linked to ferromagnetic minerals. It is also applied in chromite and manganese prospecting, the detection of sulfides associated with magnetite and/or pyrrhotite, as well as the identification of kimberlite veins, asbestos, and placer deposits. The method is further used for geological mapping of rock units with contrasting magnetic susceptibilities, structural mapping (faults, fractures, shear zones, folds), and the exploration of deposits related to bedrock topography (stratiform Pb-Zn deposits, uranium in sedimentary-conglomerate settings).
DRON-MAG represents a recent advancement in aeromagnetometry, employing unmanned aerial vehicles (UAVs) equipped with magnetometers, georeferencing systems, and other navigation instruments to perform magnetic surveys with greater efficiency. Automated mission design, low-altitude flights, and the ability to cover large areas in short timeframes make UAV magnetic surveys more controlled, precise, and highly accurate.
What is Aeromagnetometry used for?
What is Aeromagnetometry used for?
Magnetometric exploration is primarily carried out to identify mineralized zones where ore veins or other resources of interest may be located.
It enables the generation of:
Magnetic anomaly maps
Geological structure recognition
Identification of magnetic structures
Mineral resource exploration
Geothermal prospecting
Definition of lithological boundaries
Bedrock configuration
This study is highly valuable for companies and sectors requiring subsurface exploration as part of their operations, including:
Mining
Hydrocarbon exploration
Construction and civil engineering
Archaeology
Agriculture
How does UAV Aeromagnetometry work?
As noted, UAV aeromagnetometry is conducted with specialized magnetometers mounted on drones that execute automated flights. However, data acquisition is only the first step.
Once magnetic data are collected, they must be cleaned, analyzed, and visualized in various formats to generate magnetic maps. Data analysis is a critical step in the study, as accurate visualization and interpretation are essential for making sound geological and geophysical conclusions.
It is important to note that not all mineral resources targeted for extraction are inherently magnetic. This underscores the need for expert teams who, in conjunction with geological studies of the survey area, can analyze and interpret the magnetic data to deliver actionable results. Proper processing and interpretation must be performed by specialists to ensure accurate use of magnetic maps.
What are the advantages of UAV Aeromagnetometry?
Compared with traditional exploration methods such as diamond drilling or explosives, UAV magnetometry is far more cost-effective, versatile, and efficient. While conventional methods are reliable, they are also slower, more expensive, and carry additional risks.
For instance, in a 50-hectare area, 10 or more boreholes may be required just to identify mineralized zones—followed by additional studies to analyze ore grades. With UAV aeromagnetometry, one or two surveys can generate the magnetic map of the terrain and precisely locate the ore body. Instead of drilling 10+ boreholes, only a few are needed for physical confirmation before starting extraction—saving significant costs and accelerating production timelines.
UAV magnetometry is highly versatile, suitable for projects of all scales—from small studies to regional surveys—ensuring secure and timely returns on investment.
Benefits of UAV Aeromagnetometry
Significant cost savings by avoiding “blind” drilling without prior data.
Substantial reduction in exploration time: UAV surveys can cover 50–150 hectares per day.
Increased efficiency in securing investors or funding: confirmed extractable resources enhance project value and facilitate financing.
Key Considerations in UAV Aeromagnetometry Services
Like all industrial activities, UAV operations involve inherent risks. Misuse, lack of expertise, or negligence during surveys can lead to delays and undesirable outcomes. For this reason, drone-based surveys must follow strict, measurable protocols, and both equipment and operators must hold proper identification, certifications, and comply with relevant regulations.
In Peru, the Ministry of Transport and Communications (MTC), through the DGAC, is the civil aviation authority that regulates, supervises, and enforces civil aviation and air navigation activities, under the framework of Law No. 30740 governing the use and operations of remotely piloted aircraft systems (RPAS).
For more information about this and other topics related to UAV-based aeromagnetometry, geophysical exploration, or other industrial solutions, contact info@zissougeophysics.com.
Related Notes
As an innovation in geophysics, ZISSOU GEOPHYSICS has developed the DRON-MAG system: a UAV-based aeromagnetometry service focused on subsurface exploration for the detection of ore veins and other structures identifiable through magnetic anomaly mapping. Originally developed by ZISSOU AUSTRALIA PTY LTD., the system has been successfully applied in mining, energy, and construction projects worldwide.
Some of the key advantages of the DRON-MAG system include faster and more precise acquisition of magnetic data, access to rugged and remote areas, and the versatility to cover large survey regions. Most importantly, it delivers significant cost savings for companies requiring precision studies and subsurface exploration.
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