Abstract
Eighty-one samples (coals and associated floors and dirt-partings) from the Barnsley Seam (North Yorkshire) were analysed for mineralogy and major and selected trace elements (V, Cr, Y, Zr, Nb, Ni, Cu, Pb, Zn, Rb, Sr, Ba, Mn). The mineralogical and geochemical data are interpreted as showing that the kaolinite in the Barnsley Seam formed by diagenetic recrystallisation of volcanic ash which was deposited contemporaneously with the peat. This interpretation is based on (a) the high positive correlations between kaolinite and the more immobile elements (Ti, Zr, Y, Nb), and (b) the recognition of a laterally persistent coal horizon within the seam which contains anatase in addition to appreciable amounts of kaolinite, and which is interpreted as a ‘dispersed tonstein’.
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