This enables us to identify transition metals as well as rare ground and the ligands associated with them.

A)    Technological bases of hyperspectral imaging  
The human eye sees three colours in the visible spectrum: red, green and blue. Cameras available on the market allow us to see our environment on a photograph with a precision similar to the eye. Our technology is much more powerful. Instead of analyzing only three bands or wavelengths in the visible spectrum (400nm to 700nm), the Core Mapper™ captures one image every 2 nanometres for the visible and near infrared (400nm to 1000nm) spectra.  

These 300 monochromatic images are compiled in a hyperspectral cube. Using a hyperspectral cube, we produce a matrix. In X and Y, we have the spatial information of our acquisition target, and in Z, we produce the spectrum of each pixel. Thanks to this patented technique, we obtain 1.5 million spectra per acquisition.  Since the acquisition area is 1m x 1.5m, each pixel represents 1mm2 of core surface.

The results of the hyperspectral analyses can be uploaded into most software used to create drill logs and drill hole analyses, such as Geotic, Gemcom, Geosoft Target, Gocad or Datamine. The transfer of information into the client’s databases can be set up using the following measurement criteria: a core box, a metre or even as little as a millimetre of core!  

This tool allows for a more precise and more rapid analysis of the required minerals. It not only identifies the assemblages present and estimates their quantity, but it also allows the user to visualise their distribution on the core. Furthermore, if a customer wishes to conduct a new query – for example on the assemblages indicating rare earth mineralisation instead of gold – all we need to do is integrate this new criteria into our database. By doing so, mining companies will have access to a geological databank of deposit analyses.

B)    Underlying Physics

Geologists are used to physicochemical analysis techniques such as the dispersion of X rays (EDX, microprobe) or X-ray fluorescence (XRF). These techniques measure the X-ray fluorescence emitted by electrons close to the core of atoms, which have been excited by high-energy beams (electrons, X-rays). They make it possible to analyze the atomic composition of materials from a surface of just a few microns, since it is difficult to produce the electron beams and X rays required for this type of analysis on large surfaces.
Our technology lies at another level, i.e. the last layer of electrons. When an element binds to a ligand, the electrons go through transition metals to the ligands, creating an energy imbalance and a change in the direction of the electron curve. These changes are balanced out by the absorption of photons and it is this photon absorption, which is measured by the Core Mapper™.