Rock Deformation Apparatus and Experiments for Dynamic Structural Geology

Abstract

Demonstration in the classroom or laboratory of the behavior of rock subjected to differential stress under high confining pressure provides the geologist with insights into natural geologic deformation that are difficult to obtain in any other way. This paper describes an apparatus of unique design that is simple enough for demonstration purposes or student operation, yet is equally well suited for research. The design provides for essentially maintenance-free operation and eliminates the need for bulky and expensive ancillary equipment normally required for triaxial testing. Three sets of experiments are outlined that demonstrate the effects of rock type, confining pressure, and planar anisotropy on strength, ductility, and the mode of deformation. These can be carried out with the apparatus utilizing readily available materials.