Campus Box 1169
1 Brookings Dr
Saint Louis MO 63130-4899
Experimental Rock Deformation & Structural Geology
Professor Skemer’s research interests include mantle deformation, the formation and the dynamics of plate boundaries, and the interpretation of seismological data. The underlying motivation for his research is to understand the remarkable phenomenon of plate tectonics and its variability among the terrestrial planets. Although primarily an experimentalist, his research uses the microstructures of naturally deformed rocks to infer the importance of specific deformation processes in Earth, and then develops experiments to investigate the sensitivity of these processes to a range of deformation conditions. From these experiments, one can make predictions about rock deformation at conditions or locations that are inaccessible to direct observation.
Skemer is the PI of the Rock Deformation Lab at Washington University, part of the larger Experimental Studies of Planetary Materials (ESPM) group, which includes rock deformation and experimental geochemistry. The ESPM group is also affiliated with the Institute of Materials Science and Engineering (IMSE) and the McDonnell Center for the Space Sciences (MCSS). The Rock Deformation lab has an original Griggs apparatus, which is currently capable of deforming materials at pressures up to 1.5 GPa and temperatures up to ~1250 C, at strain-rates of 10-4 to 10-7 s-1. Members of the rock deformation lab are also building a one-of-a-kind apparatus called the Large Volume Torsion (LVT) apparatus, which will facilitate deformation of materials to larger strains at pressures of up to 6 GPa. The ESPM group has a variety of analytical facilities at our disposal, including an Electron Backscatter Diffraction (EBSD) system for conducting microstructural studies of naturally and experimentally deformed materials and a Cameca 7f-geo SIMS instrument for high resolution geochemical analyses.
A Griggs apparatus for deforming rocks. Experimental deformation of coarse grained dunite.