ABSTRACT
The work presented here consists of a detailed study of the relationship between fracture morphology, flow, stress and fluid-rock chemical reactions in a fracture in a granite. The objectives of this work were the design, development and experiments of percolation to prove the feasibility of such studies for the understanding of coupled phenomena. From a hydromechanical point of view, the intrinsic transmissivity of the fracture remained constant during the two percolations considered even if the flow pattern was not stable in time. All the results of the chemical analysis showed that the chemical reactions were very sensitive to the hydromechanical conditions imposed to the fracture. The analysis of the morphology of the fracture walls showed that local changes were induced by the percolation of the fluid.
