Table 2.

Results of the X-ray CT analyses of potential iron sulphide content in the Culm slate and comparison with results of optical microscopy

SampleVoxel resolution (µm)X-ray CT analysis of thin surface slice (thickness of 27 µm comparable with the surface of polished section) (%)X-ray CT analysis of the whole sample volume (%)Polished sections using reflected light (%)
Ac. 180.0130.0230.009
B0.0170.0220.012
C0.0110.0200.021