Abstract
DTA, modified DTA, thermogravimetric and spectrochemical analyses were performed on twelve samples of Carboniferous carbonaceous shales and coals and two samples of vitrain (separated from the carbonaceous shale or coal) in west-central Sinai. The analyses indicate that these coals and carbonaceous shales belong to the high-volatile sub-bituminous A coal-rank.
Trace-element contents for Pb, Zn, Ga, B, Mn, Ge, Ni, V, Cr, Cu and U are given and averaged. These are then compared with the averages for the only published trace-element contents of the nearby Jurassic Ayun Musa coals. They are found to be richer in Pb, Zn and Ga. Ge is remarkably concentrated in the vitrain bands and seamlets inside the Carboniferous Sinai host-coals while V, Zn and Pb and, to a lesser extent, Mn, Cr and U are depleted in vitrains relative to their host-rocks.