Abstract
The concentration of 58 elements in Byron Creek coals ( % Ro = 0.942 1 ̄ .05 ), and their 1000 °C ashes were determined using intense neutron activation and plasma emission spectrometry. The organic-inorganic affinities of elements were detected by the trend of element concentration versus ash content of the samples. Antimony, boron, bromine and selenium are the only elements that are enriched in these coals. The higher concentration of boron in one coal seam is considered to indicate that this seam was deposited in a more marine environment than the other seams. Coal seams can be identified by the concentration or depletion of certain trace elements, such as boron, sodium, thorium and uranium. Similarity indices of coal samples are also a useful tool in seam identification. Certain elements, for example gallium, thorium and uranium, are more concentrated in carbominerite from the roof or floor than within the coal. Regular variation of boron, sodium, thorium and uranium may indicate the repetition of certain units in tectonically thickened coal seams.
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