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Characterization of the Altered Zone Around a Fracture in Palmottu Natural Analogue

  • K. Hartikainen (a1), H. Pietarila (a1), K. Rasilainen (a2), H. Nordman (a2), T. Ruskeeniemi (a3), P. Höltiä (a4), M. Siitari-Kauppi (a4) and J. Timonen (a1)...

Abstract

A drill core sample penetrating at a natural fracture has been analysed by helium gas techniques and by α-autoradiography. Porosity and diffusivity profiles away from the fracture have been determined and compared with structural profiles. Model calculations are used to determine the effects of sample size on the measured porosities and diffusivities.

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13. Nordman, H. and Vieno, T., Near-field model REPCOM. (Nuclear Waste Commission of Finnish Power Companies, Report YJT-94-12, 1994)

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