Physics
Scientific paper
Jul 1964
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964gecoa..28.1177b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 28, Issue 7, pp.1177-1185
Physics
2
Scientific paper
Carboniferous black shales from the Lower and Middle coal measures of the South Wales Coalfield have been analysed for uranium, thorium, potassium and carbon. In the 32 samples investigated the average values for uranium and thorium are 4·0 and 12·3 ppm respectively, and the Th/U ratio 3·2. Potassium averages 3·2 per cent and organic carbon 1·2 per cent. The amount of uranium in the samples increases with the organic carbon content, but in general shows an inverse relationship towards thorium and potassium.
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