The boreholes for the PSG experiment were drilled in January 2004. The core material from the injection borehole was found to be completely homogenous matrix to a depth of around 1.3 metres. The cores from the injection borehole are shown below.
Core material from PSG injection borehole - sections shown below in higher resolution
Section 1
Section 2
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Section 4
Section 5
Sections from the cores were sent to Finland for lab based porosity measurements (see the Support of in-situ test section).
The drilled PSG boreholes in the WT tunnel with the air ventilation system in place
Pore Space Geometry (PSG) Experiment