Characterizing the geometry of the Stripa fracture system for flow and transport studies

The large and small scale geometry of the fracture system at Stripa have been determined using regional scale remote imaging techniques and detailed data from drill core logging and drift mapping. These data identified two sub vertical dipping sets, a strong north-south striking set and a weaker set with a northwest-southeast strike, and two sub horizontal fracture sets. Fracture mapping showed a clear difference between fracture geometry in the average rock and that in the largest fracture zone, the H-zone, that was identified in the test site. The small scale fractures in the averagely fractured granitic rock at the Stripa mine site appear to mimic the large scale features, both in orientation and density. (authors). 14 refs., 2 tabs., 7 figs