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Tomographic Particle Data

The tomographic 3D images produced by the GeoCore X10 lend themselves well to detailed inspection of core-interior properties, such as geological structures (see Logging Structures) and particles embedded in the surrounding rock.

The example below shows both arsenopyrite (red) and pyrite-pyrrhotite (green) in a wall rock, and coarse gold particles (yellow) in a quartz vein, as revealed by appropriate render settings (Render Settings).

Gold Particles

Quantitative Particle Data

In addition to the 3D tomography itself, the GeoCore X10 analysis also produce quantitative particle data sets, based on spatial segmentation of the tomographic data:

  • High attenuation particles (HAPs) are identified as connected regions in space, where all voxels have an attenuation value equal to or higher than a chosen (high) attenuation threshold. In the image seen above, the gold particles would be identified as HAPs for all of the currently available threshold values (10, 12, 14, 16, 18 and 20 Al), as a voxel filled with gold attenuates even higher.

Particle Size Distribution (PSD) Plot

An often sought particle property is the particle size distribution (PSD). A representation of this is therefore available in Insight in the Particle Size Distribution Plot, enabled by Show → Particle Size Distribution (PSD).

To combine the dimensions of drill depth, particle size, and histogram counts into a 2-dimensional plot, the PSD is represented through a selection of percentile values (p25, p50, p75 and p100) calculated for the selection of particles contained in a depth range:

Particles Plot

By right clicking inside the plot, a popup menu allows the user to select which combinations of attenuation thresholds (for HAPs, see above) and percentiles to show:

Pop Up Menu

The popmenu also allows to select between different Resolutions, where resolution refers to the target length of depth ranges to accumulate particle statistics over:

Select Resolution