Samples from the Tavantolgoi coal deposit were analyzed by petrographic, elemental, FT-IR, XRD, and float-and-sink tests. The deposit is Permian age and characterized by lithotypes that are bright ...
Six (1987) and seven (2001, 2019) land use classes were recorded with overall accuracies from 84.8 to 85.3 percent. The area of coal open-pit and urban area increased from 5 percent in 1987 to 10 ...