Gamma-ray Spectrometry

Applications in Mineral Exploration

  • Locate and validate airborne anomalies.
  • Prospect for uranium.
  • Map trace elements associated with rare earth elements (REE).
  • Delineate kimberlite pipes.
  • Geological mapping of lithology.
  • Structural mapping: faults, fractures, shear zones, folds, etc.


Ground and Borehole


Portable spectrometer with gamma-ray detection, model GRS-2 from Pico Envirotec. Equipped with a GPS receiver and a pocket computer to facilitate data acquisition and processing.


Survey data and position are recorded in real time; traverses can, therefore, be surveyed in continuous or stationary mode.

In borehole Gamma-Ray Spectrometry:

  • Natural gamma-ray (total count).
  • Spectral gamma-ray.
  • May be combined with other sensors.

See more information under "Borehole Logging Services".

Supplied Products

Maps of the following elements, or ratios between these elements:

  • Potassium, K (%)
  • Equivalent uranium, eU (ppm)
  • Equivalent thorium, eTh (ppm)
  • Total rate of absorption or total radioactivity (nGy/h)
  • Ratios (eU/eTh, eU/K, and eTh/K)

A chart combining the three principal radioactive elements (K, eU and eTh) can also be calculated to represent a ternary image distribution from these radioactive elements.

Visit our Case Study Tool to see what SPECTROMETRY has done for other discoveries.