Abstract
The concentration of 52 elements in a suite of fresh coal seams and their weathered outcrops was determined using INAA. The concentration of organically bound elements such as Br, Cl and S in samples from weathered outcrops was lower than their fresh samples. In contrast, the concentration of inorganically bound elements, such as Al, Ga and Fe, in fresh samples was lower than their weathered outcrops. The concentration or depletion of elements with intermediate bonding such as S in weathered samples, was dependent on its affinity towards the organic or inorganic fraction of coal.
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