The study area is located in Bayuda desert lying about 400 km from Khartoum in the state of River Nile, North Sudan. The present study aimed to identify gold mi
This paper gives a mathematical approach to calculate the fractionation factor of isotopes in a general cluster (also known as?super-molecule), which composes o
Surrounding rock of coal seam was one of the important factors to gas occurrence. The coal seam gas occurrence was studied by the index of roof strata thickness