Chemical Analysis of Slickensides from Coal Mine Roof Shale.
NTIS: PB 231 986 :13 pages
Coal mine roof shales fracture preferentially as slickensided surfaces because of weak or nonexistent adhesion between two slickensided rock surfaces. The purpose of this Bureau of Mines research was to characterize chemically the thin film of smooth, glossy material that makes up the slickenside. This material was analyzed by electron spectroscopy and ion scattering spectrometry while in place on the rock surface and by standard methods of quantitative chemical analysis on concentrate removed from the rock. These analyses showed that the chemistry and mineralogy of the slickensides are similar to that of the adjacent shale.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 231 986