Uranium in Dartmoor plants of southwest England

A number of plants from Dartmoor, SW England, were investigated for their U contents. Uranium concentrations in the substrate ranged from 7.8 μg/g in the granite bedrock to 2.8 μg/g in the A horizon. Heather, gorse, bracken and a number of grasses growing in this substrate were sampled and analysed. Among these heather and gorse contained average U concentrations of 0.14 μg/g and 0.13 μg/g, respectively. Bracken and grasses have levels below the detection threshold of 0.02 μg/g. 9 refs.; 1 figure; 3 tabs