MINING EXPLORATION METHODS
Remote sensing and hyperspectral
Aware of the importance of remote sensing, ONHYM has been involved since 1986 in the theoretical and practical training of its teams.
Geophysics
Geophysics has always been one of the exploration tools used within ONHYM…
Geochemistry
A geochemical exploration campaign aims at locating economic mineral deposits through recognition of unusual concentrations of chemical components…
Geological prospecting
For mineral exploration, The ONHYM’s Geologists use basic geological mapping is an absolute necessity…
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Processes
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Regional Prospecting
In areas where geological and mining data are scarce, a first phase of regional exploration (100 to 10,000 km²) called strategic is carried out to highlight anomalous areas. During this stage, essentially non-invasive techniques will be implemented both on the ground and in the airborne:
- Remote sensing by satellite imagery / Hyperspectral
- Airborne geophysics
- Geological mapping
- Regional geochemistry
Anomalies follow-up
Occurrences development
During this qualified phase of occurrences development, superficial tools of the tactical phase (geochemistry and ground geophysics) are used, possibly in more detail, also investigations in the immediate subsoil (by trenches, by surveys or per well). This phase makes it possible to highlight prospects.
Prospect Evaluation
During this phase, which aims to determine the envelope of the ore body and evaluate the resources, we mainly use boreholes and / or destructive holes, initially punctual (scattered) and then tightened systematically according to a regular grid with possibly measurements of the properties of the rocks traversed directly in sounding. This computerized data is used to generate 3D geological models that visualize the mineralized body envelope and its main characteristics.
Prospect development and promotion
This phase consists of developing the prospect and promoting it through economic feasibility studies.
Latest news
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