Anwendung der geologischen Gefügekunde zur Charakterisierung natürlicher Werksteine - Fallbeispiel: Kauffunger Marmor / Application of geological fabric analyses for the characterization of natural building stones. - Case study: Kauffung marble

Abstract

In geology, methods of fabric analyses are largely applied in order to reconstruct the rock-forming processes and define the environments in which they formed. Often, rocks are characterized by polyphase imprints, which occured over a long time span under varying conditions (pressure, temperature, chemical environmentj. In these cases, the final fabrics are usually rather complex. The Kauffung marble is used as an example to demonstrate, how the methods of geological fabric analyses can be applied to the characterization of natural building stones. A correlation with petrophysical analyses reveals that the most important fabric parameters are crystallographic-preferred orientation (texture), the shape-preferred orientation and the microcrack populations, which are usually responsible for a distinct anisotropy. They mainly control the directional dependence of the material properties. These anisotropic properties should be considered during the cutting and later use of natural building stones.