Diffusion pathway in crystalline rock-examples from Aspo-diorite and fine-grained granite

摘要

The influence of heterogeneous porosity, mineralogical composition and texture on the diffusion of alkali and alkaline earth metals in water-saturated crystalline rock was studied. Through-diffusion technique was used, and the concentration profiles in the rock samples were Measured. The porosity distribution was studied by the ~14C-polymethylmethacrylate(PMMA) Impregnation method. The distribution of the tracers was observed from autoradiographs and was Then compared to the mineralogical and structural composition of the rock.