Computer simulations of one-dimensional lattice finge images of various authigenic illites and chlorites indicate several possibilities for misinterpretation of High Resolution Electron Microscopy images of layer silicates. Experimental images of authigenic illites and chlorites from reservoir rocks located offshore Norway have been compared to computer-simulated lattice fringe images based on the multi-slice formalism of solving the Schroedinger equation. The results indicate that an intuitive conception of the mineral imaged combined with energy dispersive X-ray analysis of the same mineral is insufficient in order to discriminate between several different layer silicates.Jahren Jens S., Olsen Arne. Transmission electron microscopy of authigenic layer-silicates from offshore Norway. In: Proceedings of the 9th international Clay Conference, Strasbourg, 1989. Vol V : Industrial applications of clays. Analytical techniques and teaching of clay mineralogy. Strasbourg : Institut de Géologie – Université Louis-Pasteur, 1990. pp. 133-141. (Sciences Géologiques. Mémoire, 89
