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This work constitutes the first survey of I isotope ratios for Scottish sea water including the first data for the west of Scotland. These data are of importance because of the proximity to the world’s second largest emission source of 129 I to the sea, the Sellafield nuclear reprocessing plant, because of the increasing importance of the sea to land transfer of 129 I and also as input...
The abundance and isotopic composition of He have been determined for a variety of natural gases (oil-field gases) in sedimentary basins in the continent of China. The 3 He/ 4 He and 4 He/ 20 Ne ratios range from 0.004 to 4.99 Ra (where Ra denotes atmospheric 3 He/ 4 He ratio = 1.4 × 10 −6 ), and from 100-39,000, respectively. Helium in the gas...
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